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Dissertations / Theses on the topic 'Solvent extraction processes'

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Published: 4 June 2021

Last updated: 1 February 2022

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1

Haupt, Petronella. "Effective solvent extraction of coal and subsequent separation processes." Diss., Pretoria : [s.n.], 2006. http://upetd.up.ac.za/thesis/available/etd-08282007-113611.

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Thesis (M. Eng.)(Chemical Engineering)--University of Pretoria, 2006.<br>Accompanied by a CD-ROM containing Matlab programs. Includes bibliographical references. Available on the Internet via the World Wide Web.

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2

Rashid, Salman Ghanem. "Studies on copper extraction with hydroxyoxime extractants for the design of hollow fibre membrane based extraction processes." Thesis, University of South Wales, 1999. https://pure.southwales.ac.uk/en/studentthesis/studies-on-copper-extraction-with-hydroxyoxime-extractants-for-the-design-of-hollow-fibre-membrane-based-extraction-processes(7e631b77-71e2-4d6e-8c03-4636d42f9f69).html.

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This work has included a review of the most relevant aspects of measurement techniques and mathematical models proposed in the literature to assess the equilibrium and mass transfer data of metal extraction by the use of chelating agents. The limitations of these techniques and models have been highlighted. Three chelating extractants diluted in EscaidllO were used to study the extraction equilibrium of copper. The extractants are 5-nonylacetophenone oxime (LIX84®), 5- dodeylsalicylaldoxime (LIX860®) and 50/50 v/v mixture of both oximes (LIX984®). The copper concentration changes in the aqueou

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3

Gordon, Ross John. "Improved mass transport efficiency in copper solvent extraction." Thesis, University of Edinburgh, 2009. http://hdl.handle.net/1842/5673.

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This thesis considers methods which can be employed to increase the mass of copper transferred into and out of the organic phase during the load and strip stages of commercial solvent extraction processes. Conventional 5-alkylsalicylaldoxime reagents transfer 1 mol of divalent copper per 2 mol of ligand in a neutral complex of the type [Cu(L-H)2] via a pH-swing process. New triacidic ligands have been designed which triple the molar transport of copper to form [Cu3(L-3H)2]. Until recently copper recovery by solvent extraction has been confined to oxidic ores which are leached with sulfuric aci

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4

Pavón, Regaña Sandra. "Rare earth elements recovery from E-wastes by solvent extraction and supported liquid membrane processes." Doctoral thesis, Universitat Politècnica de Catalunya, 2019. http://hdl.handle.net/10803/671107.

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Nowadays, rare earth elements (REEs) have gained importance due to their indispensable and critical use in many high-tech industries like hybrid cars, fluorescent lamps, flat screen televisions, mobile phones, disc drives and wind turbines. Since these metals are needed to supply the required functionality in advanced technologies development and the lack of alternative materials, the REEs recovery from urban mining seems to be promising. Moreover, being the ores mines and their strip mining to REEs production placed in a few specific countries such as China, United States and Australia, the s

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5

SOARES, PAULO S. M. "Estudo preliminar do fracionamento de terras raras medias e pesadas em grupos com extracao por solventes." reponame:Repositório Institucional do IPEN, 1994. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10353.

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6

FAVARO, DEBORA I. T. "Estudo do comportamento de alguns lantanidios nas extracoes com misturas binarias de acido DI-(2-ETILHEXIL) fosforico (HDEHP) tenoiltrifluoroacetona." reponame:Repositório Institucional do IPEN, 1985. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9843.

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7

Negrete-Virgen, Juan Alejandro. "Manufacture of adenoviral vectors for gene therapy applications : critical comparison of solvent extraction and adsorption-based processes." Thesis, University of Birmingham, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288887.

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The biotechnology industry has recently been demanding nanoparticulate products (20-200 nm) such as viruses, plasmids, virus-like particles and drug delivery assemblies. These products are mainly used as gene delivery systems in gene therapy protocols. Adenoviral vectors {Ad) are the most exploited gene therapy vectors in industry worldwide. The :ma.nu.fu.cture of Ad fuces several problems including {i) small volumes of product per batch of cell culture, {ii) inaccurate, time consuming and multifuctor-dependant methods for infectivity determination and (iii) downstream processing. The downstre

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ZARPELON, LIA M. C. "Contribuicao ao estudo da separacao zirconio/hafnio no sistema MIBK-HSCN-HCL." reponame:Repositório Institucional do IPEN, 1995. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10423.

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9

Turkington, Jennifer Rachel. "Investigation into the modes of action of extractants for base metal cations and metalate anions." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/9567.

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This thesis involves the design and development of reagents for the recovery of base metals (specifically zinc, nickel and cobalt) in hydrometallurgical solvent extraction processes. The work aims to demonstrate how ligand design can affectively tune the strength and selectivity of extractants to achieve efficient recovery of the desired base metals. Chapter 1 reviews current solvent extraction processes used in extractive metallurgy, encompassing both the well established technologies developed for sulfate streams as well as those more recently explored for treating chloride streams. Also rev

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SANTOS, JACINETE L. dos. "Recuperacao de ions Eu(III) e de U(VI) de efluentes aquosos utilizando a tecnica de membranas liquido suportadas (MLS) e macrociclicos como agentes extratores." reponame:Repositório Institucional do IPEN, 2007. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9379.

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Ramirez, Cadavid David A. "Development of Processes for the Extraction of Industrial Grade Rubber and Co-Products from the Roots of Taraxacum kok-saghyz (TK)." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1512060296142347.

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Lundstedt, Staffan. "Analysis of PAHs and their transformations products in contaminated soil and remedial processes." Doctoral thesis, Umeå universitet, Kemi, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-57.

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Soil that is heavily contaminated with polycyclic aromatic hydrocarbons (PAHs) is often found at the sites of former gasworks and wood-impregnation plants. Since PAHs are toxic these sites represent a hazard to human health and the environment, and therefore they need to be treated, preferably by a method that destroys the contaminants, and thus eliminates the problem permanently. However, during biological and chemical degradation of PAHs other toxic compounds may be formed. If these transformation products are sufficiently persistent they could potentially accumulate during remedial processe

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13

Makaka, Siphokazi. "The development of an empirical mass transfer relationship for the extraction of copper ions in a carrier facilitated tubular supported liquid membrane system." Thesis, Cape Peninsula University of Technology, 2011. http://hdl.handle.net/20.500.11838/866.

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Thesis submitted in fulfilment of the requirements for the degree Master of Technology: Chemical Engineering in the Faculty of Engineering at the Cape Peninsula University of Technology 2011<br>Treatment of waste material from mining and mineral processing is gaining increasing importance as a result of the increasing demand for high purity products and environmental concerns. Supported liquid membranes (SLMs) have been proposed as a new technology for the selective removal of metal ions from a solution. This technology can be described as the simultaneous extraction and stripping operation, c

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14

Khalfalla, Hamza Abdulmagid. "Modelling and optimisation of oxidative desulphurization process for model sulphur compounds and heavy gas oil : determination of rate of reaction and partition coefficient via pilot plant experiment : modelling of oxidation and solvent extraction processes : heat integration of oxidation process : economic evaluation of the total process." Thesis, University of Bradford, 2009. http://hdl.handle.net/10454/4247.

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Heightened concerns for cleaner air and increasingly more stringent regulations on sulphur content in transportation fuels will make desulphurization more and more important. The sulphur problem is becoming more serious in general, particularly for diesel fuels as the regulated sulphur content is getting an order of magnitude lower, while the sulphur contents of crude oils are becoming higher. This thesis aimed to develop a desulphurisation process (based on oxidation followed by extraction) with high efficiency, selectivity and minimum energy consumption leading to minimum environmental impac

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Manic, Marina. "Alternative solvents in separation processes." Doctoral thesis, Faculdade de Ciências e Tecnologia, 2012. http://hdl.handle.net/10362/8774.

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Dissertation presented to obtain the Ph.D degree in Sustainable Chemistry<br>Fundação para a Ciência e Tecnologia - through doctoral fellowship SFRH/BD/45323/2008, and grant No Pest-C/EQB/LA0006/2011; partially supported from the Conselho de Reitores das Universidades Portuguesas (CRUP) – Integrated project Portugal-Spain, No E-95/10.

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Van, Dyk Braam. "Computerized design of solvents for extractive processes." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52171.

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Thesis (PhDEng)--University of Stellenbosch, 2001.<br>ENGLISH ABSTRACT: Separation processes are an integral part of chemical engineering. The purity of a chemical product is among the principal factors influencing its value. Therefore, any method that can increase the purity of a product or decrease the cost of purification will have a direct effect on the profitability of the entire plant. An important class of separation processes is the solvent-based separations. This includes processes like extractive distillation, liquid-liquid extraction and chromatographic separation. Heterogen

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Machado, Alex Barreto. "Estudos do processo de extração liquido-liquido para a purificação do acido acrilico." [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/267256.

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Orientadores: Maria Regina Wolf Maciel, Martin Aznar<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Quimica<br>Made available in DSpace on 2018-08-11T22:03:29Z (GMT). No. of bitstreams: 1 Machado_AlexBarreto_M.pdf: 1251594 bytes, checksum: 12614335c44f56e98288ed9de32033db (MD5) Previous issue date: 2007<br>Resumo: Observa-se que, nos últimos anos, a procura por novos processos de separação para a recuperação de ácidos orgânicos, dentre eles o ácido acrílico, a partir de seu caldo de fermentação, tem sido intensa. O processo de extração líquido-líquido

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Alberts, Estelle. "Stripping rare earth elements and iron from D2EHPA during zinc solvent extraction." Thesis, Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/17999.

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Thesis (MScEng)--Stellenbosch University, 2011.<br>ENGLISH ABSTRACT: At Skorpion Zinc mine, in south-west Namibia, zinc oxide ore is refined through sulphuric acid leaching, solvent extraction, electrowinning and casting of the final 99.995 % Zn metal. Over the last four years, the rare earth element concentrations, with particular reference to Y, Yb, Er and Sc, have significantly increased in the circulating electrolyte and the zinc-stripped organic phase streams in the electrowinning and solvent extraction processes. This project had two main objectives: firstly, the effect(s) of rare e

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Olivier, Michiel Casparus. "Developing a solvent extraction process for the separation of cobalt and iron from nickel sulphate solutions." Thesis, Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/17984.

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Thesis (MScEng)--Stellenbosch University, 2011.<br>ENGLISH ABSTRACT: Crude NiSO4 solutions are often produced as a product of Sherrit based matte leach processes leading to iron and cobalt contaminated solutions of NiSO4. To upgrade the quality of these solutions for either, the production of NiSO4 crystals or cathode/precipitated nickel, the iron and cobalt must be removed. Conventional processes use either pure or saponified Cyanex 272 in solvent extraction to extract iron and cobalt from pregnant nickel leach solutions. These processes require the addition of an alkali like NaOH to neutral

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Luo, Haoqun. "The production of food-grade protein isolates from yellow mustard seed by solvent extraction and membrane processng techniques." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape10/PQDD_0004/MQ40911.pdf.

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Bonomi, Élida Castilho 1980. "Extração de pilocarpina e episopiloturina de jaborandi utilizando processos envolvendo solventes supercriticos." [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266131.

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Orientadores: Theo Guenter Kieckbusch, Alvaro Bandeira Antunes de Azevedo, Paulo Mazzafera<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Quimica<br>Made available in DSpace on 2018-08-12T06:53:04Z (GMT). No. of bitstreams: 1 Bonomi_ElidaCastilho_M.pdf: 844306 bytes, checksum: ded6228c542b4a2c0395b78051da004e (MD5) Previous issue date: 2008<br>Resumo: Pilocarpina é um alcalóide encontrado somente nas folhas de jaborandi (Pilocarpus microphyllus), uma espécie vegetal nativa da flora brasileira e empregada principalmente no tratamento de glaucoma e de x

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Santos, Kátia Andressa. "Estudo dos processos de extração do óleo de candeia (Eremanthus erythropappus) com fluidos pressurizados e solvente assistido por ultrassom." Universidade Estadual do Oeste do Paraná, 2018. http://tede.unioeste.br/handle/tede/3579.

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Submitted by Marilene Donadel (marilene.donadel@unioeste.br) on 2018-04-27T00:49:59Z No. of bitstreams: 1 Katia_A_Santos_2018.pdf: 1940481 bytes, checksum: dd10357b3e5c25bdf7e64bb4148af513 (MD5)<br>Made available in DSpace on 2018-04-27T00:49:59Z (GMT). No. of bitstreams: 1 Katia_A_Santos_2018.pdf: 1940481 bytes, checksum: dd10357b3e5c25bdf7e64bb4148af513 (MD5) Previous issue date: 2018-03-02<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>Candeia (Eremanthus erythropappus) is a native species of the Brazilian Atlantic forest from which an essential oil with high co

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Ben, Amor Bouthaina. "Maîtrise de l'aptitude technologique de la matière végétale dans les opérations d'extraction de principes actifs : texturation par détente instantanée contrôlée (DIC)." Phd thesis, Université de La Rochelle, 2008. http://tel.archives-ouvertes.fr/tel-00399131.

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Le présent travail de thèse porte sur l‘étude de l‘effet de la texturation par Détente Instantanée Contrôlée (DIC) sur l‘opération d‘extraction solide liquide d‘oligosaccharides à partir des graines de Tephrosia purpurea et d‘anthocyanes à partir de calices de Roselle (Hibiscus sabdariffa) en vue d‘améliorer la cinétique et le rendement d‘extraction. Une analyse fondamentale a prouvé l‘importance de la diffusion du solvant dans la matrice solide et de l‘extrait dans le solvant, en tant que principal processus limitant. L‘expansion de la structure solide a donc été identifiée comme principale a

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Addo, Douglas Kweku. "OPERATION AND PROCESS CONTROL DEVELOPMENT FOR A PILOT-SCALE LEACHING AND SOLVENT EXTRACTION CIRCUIT RECOVERING RARE EARTH ELEMENTS FROM COAL-BASED SOURCES." UKnowledge, 2019. https://uknowledge.uky.edu/mng_etds/50.

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The US Department of Energy in 2010 has identified several rare earth elements as critical materials to enable clean technologies. As part of ongoing research in REEs (rare earth elements) recovery from coal sources, the University of Kentucky has designed, developed and is demonstrating a ¼ ton/hour pilot-scale processing plant to produce high-grade REEs from coal sources. Due to the need to control critical variables (e.g. pH, tank level, etc.), process control is required. To ensure adequate process control, a study was conducted on leaching and solvent extraction control to evaluate the po

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Ager, Patrick. "Recycle of complexing reagents during mechanical pulping." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=82813.

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The stability of hydrogen peroxide (H2O2) is a critical factor for the brightening of mechanical pulps. Inorganic ions, including Fe, Mn and Cu catalytically decompose H2O2. These troublesome metals promote the rapid transformation of H2O2 to nonselective hydroxyl radicals that degrade the cellulose fibres and decrease yields.<br>The interaction of aqueous metal•complexes with magnesium metal (Mg°) or bimetallic mixtures of magnesium with either palladium (Pd°/Mg°) or silver (Ag°/Mg°) were optimized to remove metals (Mn, Cu and Fe) from solution with concomitant release of the complexi

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Klein, Elissandro Jair. "Obtenção de compostos bioativos de folhas de uvaia (Eugenia pyriformis Cambess.) utilizando CO2 supercrítico e extração com solvente assistida por ultrassom." Universidade Estadual do Oeste do Paraná, 2016. http://tede.unioeste.br/handle/tede/3729.

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Submitted by Marilene Donadel (marilene.donadel@unioeste.br) on 2018-06-04T23:33:22Z No. of bitstreams: 1 Elissandro_Klein_2016.pdf: 4516260 bytes, checksum: 605fbf2e69fd746b1152b1431bf0dca5 (MD5)<br>Made available in DSpace on 2018-06-04T23:33:22Z (GMT). No. of bitstreams: 1 Elissandro_Klein_2016.pdf: 4516260 bytes, checksum: 605fbf2e69fd746b1152b1431bf0dca5 (MD5) Previous issue date: 2016-02-04<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>Eugenia pyriformis Cambess. (Uvaia), typical of the Atlantic Forest belongs to the Myrtaceae family, the same family of cher

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Obón, Estrada Eleonora. "Towards the recovery of rare earth elements from end-of-life products : hydrometallurgical routes and mathematical modelling of extraction systems." Doctoral thesis, Universitat Politècnica de Catalunya, 2019. http://hdl.handle.net/10803/669262.

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The rare earth elements (REEs) are essential ingredients for the development of modern industry and the transition to a more sustainable economy model. The unique physicochemical features of these elements, such as their magnetism and optical properties, are greatly expanding their application. They have become key elements for the manufacture of many ordinary consumer goods like hybrid cars, fluorescent lamps or electronic devices like mobile phones or tablets. The growing popularity of the rare earth elements derivatives is leading to an increase in the global demand and the price of these e

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Minier, Michel. "Fermentation acetonobutylique par couplage a des procedes membranaires et fermentation extractive." Toulouse 3, 1987. http://www.theses.fr/1987TOU30290.

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Cesari, Laëtitia. "Extraction de composés phénoliques à partir d’une bio-huile de lignine." Thesis, Université de Lorraine, 2017. http://www.theses.fr/2017LORR0148/document.

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La biomasse ligno-cellulosique est principalement constituée de cellulose, d’hémicellulose et de lignine. Par conversion thermochimique, la lignine se transforme en bio-huile riche en composés phénoliques. Ces composés phénoliques sont généralement récupérés à l’aide de plusieurs étapes d‘extractions liquide-liquide consécutives impliquant des solvants aqueux et organiques. À l’aide d’une approche multi-échelle, nous avons étudié, la faisabilité et l’efficacité d’un liquide ionique, la [Choline][NTf2], pour l’extraction liquide-liquide de ces composés. En effet, l’utilisation de ce solvant per

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Christen, Pierre. "Faisabilite d'un procede a membrane liquide pour l'extraction continue de l'ethanol produit par fermentation." Paris, ENMP, 1987. http://www.theses.fr/1987ENMP0055.

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Une membrane liquide composee d'un support poreux hydrophobe impregne d'un solvant organique a ete mise au point; l'isotridecanol s'est avere etre biocompatible, impermeable aux sels et au glucose et autorise un flux d'ethanol important (35 g/h. M**(2)). Cette membrane liquide mise en oeuvre avec une phase receptrice aqueuse a permis, par l'extraction de l'ethanol inhibiteur, une detoxification significative d'un mout de fermentation en activite: amelioration de la viabilite des levures et de productivite du fermenteur d'un facteur 2,5. En outre, ce procede d'extraction a permis de mettre en e

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SENEDA, JOSE A. "Separação e recuperação de chumbo-208 dos resíduos de tório terras raras gerados na unidade piloto de purificação de nitrato de tório." reponame:Repositório Institucional do IPEN, 2006. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11424.

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Marin, Gallego Mylene. "Valorisation chimique des condensats issus de la torréfaction de biomasses : modélisation thermodynamique, conception et analyse des procédés." Thesis, Toulouse, INPT, 2015. http://www.theses.fr/2015INPT0131.

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La biomasse lignocellulosique est considérée comme une ressource de carbone renouvelable possédant un grand potentiel pour la une valorisation énergétique et chimique. La torréfaction de la biomasse sèche (de type bois) est un procédé de transformation thermique s’effectuant à des températures comprises entre 200°C et 300°C, et un temps de séjour compris entre quelques minutes et plusieurs heures, opérant sous pression atmosphérique et en défaut d’air. Le produit principal de la torréfaction est un combustible solide hydrophobe et stable. Cette opération génère des coproduits gazeux à haute te

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Nimet, Graziane. "Avaliação dos solventes dióxido de carbono supercrítico e propano subcrítico na extração do óleo de girassol." Universidade Estadual do Oeste do Parana, 2009. http://tede.unioeste.br:8080/tede/handle/tede/1882.

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Made available in DSpace on 2017-07-10T18:08:11Z (GMT). No. of bitstreams: 1 Graziane Nimet.pdf: 1353692 bytes, checksum: 58189bc7e0667a1191782c8b8899d494 (MD5) Previous issue date: 2009-02-13<br>The extraction of oil from greasy seeds is traditionally based in the use of organic solvents. Currently the most used method is the process of extraction by n-hexane. Aiming the obtainment of vegetable oil with higher quality using clean technologies with reduction of oil contamination through solvent and minimizing the damage to the environment is that the technology with fluid pressurized has bec

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Silva, Simone Braga da. "Estudo da extração do óleo de pitanga (Eugenia uniflora L.) vermelha e roxa empregando os solventes CO2 e n - propano em altas pressões." Universidade Estadual do Oeste do Parana, 2012. http://tede.unioeste.br:8080/tede/handle/tede/1908.

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Made available in DSpace on 2017-07-10T18:08:20Z (GMT). No. of bitstreams: 1 Simone B da Silva.pdf: 2034717 bytes, checksum: 1c7683115c59f0015aa5cc305ee2e164 (MD5) Previous issue date: 2012-02-15<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>From Surinam cherry s leaves (Eugenia uniflora L.) it is possible to extract oil that has been utilized industrially, especially by cosmetics and pharmaceuticals sectors. The extraction of this oil by using conventional methods often causes the thermal degradation of its components, and an interesting alternative has been the use of s

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Pederssetti, Marcia Mantovani. "Análise dos efeitos da temperatura e pressão na extração supercrítica do óleo essencial de canola com dióxido de carbono supercrítico e n-propano pressurizado." Universidade Estadual do Oeste do Parana, 2008. http://tede.unioeste.br:8080/tede/handle/tede/1880.

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Made available in DSpace on 2017-07-10T18:08:11Z (GMT). No. of bitstreams: 1 Marcia Mantovani Pederssetti.pdf: 917281 bytes, checksum: 50ba8dd14f7101247d812d9fdf8375a6 (MD5) Previous issue date: 2008-12-08<br>Currently it is possible to observe a great interest in the consumption of canola oil due to medical and nutritionist indication as a functional food for people who are interested in a healthy diet, for the reason of its excellent composition of fatty acid. The most common employed process to the canola oil extraction is the use of organic solvents, normally it is used the n-hexane that

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Ribas, Marielen Cozer. "Estudo do processo combinado de extração em altas pressões e purificação do óleo de candeia pelo processo de adsorção em coluna de leito fixo." Universidade Estadual do Oeste do Parana, 2012. http://tede.unioeste.br:8080/tede/handle/tede/1830.

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Made available in DSpace on 2017-07-10T18:07:56Z (GMT). No. of bitstreams: 1 Marielen Cozer Ribas.pdf: 2522665 bytes, checksum: 1020b92a3d388f2660eb04bfac58016a (MD5) Previous issue date: 2012-02-14<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>The Candeia (Eremanthus erythropappus) has a rich oil in α-bisabolol, a substance of high commercial value and wide industrial application. An alternative to traditional methods of extraction and / or fractionation of the candeia oil is the use of supercritical technology, with the advantage of not having the disadvantages o

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GideonEffendi, Petrick, and 黃敏獅. "Study on Recovery of Nonionic Surfactants by Solvent Extraction after Surfactant-Based Extraction Processes." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/60300843438629892098.

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Ferreira, Ana Maria da Conceição. "Ionic liquids aqueous solutions as sustainable solvents in separation processes." Doctoral thesis, 2018. http://hdl.handle.net/10773/24094.

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This work is focused on the development of sustainable and cost-effective solvents and separation processes, particularly by applying aqueous solutions of ionic liquids (ILs). It is shown the potential of ILs aqueous solutions as alternative solvents to extract value-added compounds from biomass, avoiding the use of the commonly applied volatile organic solvents, and their use as phase-forming components of aqueous biphasic systems (ABS) to develop reversible and/or integrated separation platforms. In the first set of results, it is demonstrated the high performance of ILs aqueous solutions t

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Cheng, Hou-Chieh, and 程厚捷. "Computer-Aided Solvent Design for Extractive Fermentation Processes with Cell-recycling." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/12297184056097072527.

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博士<br>國立中正大學<br>化學工程所<br>96<br>In this study, a systematic framework for the design and analysis of solvents in extractive fermentation-distillation systems is developed using a computer-aided molecular design (CAMD) technique. The article framework consists of performances of fermentation process, solvent evaluation, and solution strategy approaches. Bioethanol is a bulk chemical and must carry out continuous fermentation to achieve economic and beneficial production. Achieving high productivity of ethanol continuous fermentation requires retaining high cell density culture and maximizing the

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Chiou, Ming-Hao. "Process Simulation and Evaluation of Alternative Solvents for Jatropha Curcas L. Seed Oil Extraction in Biodiesel Production." Thesis, 2011. http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-9205.

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Jatropha curcas L. is a drought-resistant plant which can be grown in poor soil and marginal lands. The use of Jatropha seed oil to produce biodiesel has been widely studied in recent years. Results showed that it is one of the most promising alternatives for conventional petro-diesel. Currently, hexane is still the most commonly used solvent for commercial oil extraction. However, the increasing price and flammability properties of hexane are motivating industry to seek alternative solvents. The objectives of this study are to design and analyze the Jatropha seed oil extraction for use in bio

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Bastos, João António Pereira de Carvalho. "Modelagem de processos de destilação extractiva : selecção de solventes, simulação e integração energética." Tese, 1987. http://hdl.handle.net/10216/12240.

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Bastos, João António Pereira de Carvalho. "Modelagem de processos de destilação extractiva : selecção de solventes, simulação e integração energética." Doctoral thesis, 1987. http://hdl.handle.net/10216/12240.

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Sousa, Ana Maria do Sacramento Lopes. "Valorização de resíduos da indústria vinícola através de processos de extração por solventes." Master's thesis, 2020. http://hdl.handle.net/10316/92283.

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Dissertação de Mestrado Integrado em Engenharia Química apresentada à Faculdade de Ciências e Tecnologia<br>A indústria vinícola é um setor de atividade muito importante em Portugal e no mundo, gerando elevadas quantidades de resíduos sólidos e líquidos. O bagaço de uva é um dos resíduos sólidos resultantes do processo de vinificação que é rico em compostos de valor acrescentado, os polifenóis. Estes compostos são uma classe de metabolitos produzidos pelas plantas, com elevado poder antioxidante, e com inúmeros benefícios biológicos, podendo ser utilizados na indústria alimentar ou farmacêutic

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Detcheberry, Mylene. "Valorisation chimique des condensats issus de la torréfaction de biomasses : modélisation thermodynamique, conception et analyse des procédés." Thesis, 2015. http://www.theses.fr/2015INPT0131/document.

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La biomasse lignocellulosique est considérée comme une ressource de carbone renouvelable possédant un grand potentiel pour la une valorisation énergétique et chimique. La torréfaction de la biomasse sèche (de type bois) est un procédé de transformation thermique s’effectuant à des températures comprises entre 200°C et 300°C, et un temps de séjour compris entre quelques minutes et plusieurs heures, opérant sous pression atmosphérique et en défaut d’air. Le produit principal de la torréfaction est un combustible solide hydrophobe et stable. Cette opération génère des coproduits gazeux à haute te

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