Academic literature on the topic 'Sulfite pulping'
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Journal articles on the topic "Sulfite pulping"
Fearon, Olesya, Susanna Kuitunen, and Tapani Vuorinen. "Reaction kinetics of strong nucleophiles with a dimeric non-phenolic lignin model compound with α-carbonyl functionality (adleron) in aqueous alkali solution." Holzforschung 70, no. 9 (September 1, 2016): 811–18. http://dx.doi.org/10.1515/hf-2015-0236.
Full textZHU, J. Y., M. SUBHOSH CHANDRA, ROLAND GLEISNER, WILLIAM GILLES, JOHNWAY GAO, GEVAN MARRS, DWIGHT ANDERSON, and JOHN SESSIONS. "Case studies on sugar production from underutilized woody biomass using sulfite chemistry." TAPPI Journal 14, no. 9 (October 1, 2015): 577–83. http://dx.doi.org/10.32964/tj14.9.577.
Full textFISKARI, JUHA, OLGA DERKACHEVA, and TUOMAS KULOMAA. "QUICK NON-DESTRUCTIVE ANALYSIS OF CONDENSED LIGNIN BY FTIR. PART 2. PULP SAMPLES FROM ACID SULFITE COOKING." Cellulose Chemistry and Technology 55, no. 3-4 (April 20, 2021): 263–70. http://dx.doi.org/10.35812/cellulosechemtechnol.2021.55.26.
Full textLatibari, Ahmad Jahan, Mohammad Ali Hossein, and Reza Hosseinpour. "Application of alkaline sulfite pulping on corn stalks." BioResources 6, no. 1 (November 3, 2010): 48–58. http://dx.doi.org/10.15376/biores.6.1.48-58.
Full textAkhtaruzzaman, A. F. M., Samar Kanti Bose, Paritosh Das, and Sujith Kumar Chowdhury. "Neutral sulfite anthraquinone pulping of bagasse." Nordic Pulp & Paper Research Journal 6, no. 1 (January 1, 1991): 8–11. http://dx.doi.org/10.3183/npprj-1991-06-01-p008-011.
Full textWang, D. L. K., and R. Patt. "Alkaline Sulfite-Anthraquinone Pulping of Bagasse." Holzforschung 43, no. 4 (January 1989): 261–64. http://dx.doi.org/10.1515/hfsg.1989.43.4.261.
Full textHögman, Stefan, and Nils Hartler. "Refiner addition of sulfite in mechanical pulping." Nordic Pulp & Paper Research Journal 3, no. 1 (January 1, 1988): 38–43. http://dx.doi.org/10.3183/npprj-1988-03-01-p038-043.
Full textKeskin, A., and G. J. Kubes. "Kinetics of Neutral Sulfite Semichemical and Neutral Sulfite Semichemical-Anthraquinone Pulping." Journal of Wood Chemistry and Technology 14, no. 1 (February 1, 1994): 103–17. http://dx.doi.org/10.1080/02773819408003088.
Full textWang, Zhe, Jing Wen Xue, Ji Shi Zhang, and Wen Xia Liu. "Ultrafiltration Treatment and Physical Properties of Ammonia Sulfite Pulping Liquor of Wheat Straw." Advanced Materials Research 560-561 (August 2012): 909–13. http://dx.doi.org/10.4028/www.scientific.net/amr.560-561.909.
Full textDo, Vu Thang, Keishi Tanifuji, Guangfan Jin, and Hiroshi Ohi. "Neutral Sulfite Semi–Chemical Pulping of Moso–Bamboo." JAPAN TAPPI JOURNAL 74, no. 4 (2020): 379–87. http://dx.doi.org/10.2524/jtappij.74.379.
Full textDissertations / Theses on the topic "Sulfite pulping"
Keskin-Schneider, Aliye. "Engineering reaction kinetics in sulfite and sulfite-anthraquinone pulping." Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=70207.
Full textIn preliminary studies, an experimental design was tested and optimum kinetic conditions were found so that penetration and diffusion would not be the rate-controlling steps and the amount of anthraquinone would not be reaction limiting.
Delignification and carbohydrate degradation rate expressions for both NS and NS-AQ pulping were developed. Research was extended to develop delignification rate expressions for NSSC and NSSC-AQ pulping. The degree of delignification was measured by determining the lignin content of the pulp. Carbohydrate content in the pulp was estimated from the difference between the pulp yield and the residual lignin in the pulp. Reaction temperature and pulping chemical concentrations were held essentially constant in all kinetic experiments. Isothermal experiments were conducted in the temperature range between 165 and 180$ sp circ$C. A concentration of 150g/l sodium sulfite with a liquor-to-wood ratio of 62 was used.
The effect of sulfite concentration on the delignification rate expressions for NS and NS-AQ pulping was also investigated. The rates of delignification were determined at 175$ sp circ$C over the concentration range of 54 to 154 grams sodium sulfite per liter. It was observed that the reaction rate orders with respect to sodium sulfite charge were 0.3 and 0 for the delignification rate of NS and NS-AQ pulping respectively.
The applicability of the H-factor for predicting pulping characteristics during NS-AQ and NSSC-AQ pulping was confirmed.
The role of anthraquinone as a redox catalyst in NS-AQ was investigated. It was observed that anthraquinone is reduced in NS liquor, and that the redox cycle is involved in NS-AQ pulping.
Wei, Hongmei. "The role of surfactants in sulfite pulping /." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=84853.
Full textA mixture of anionic and nonionic surfactants, effective in neutral sulfite pulping, was selected during the pulping experiments. Due to the surfactants present in the pulping liquor, the reaction rate of carbohydrate degradation was found to be considerably lower when compared with those of control without surfactants.
The surfactant mixture was observed to accelerate the deresination process during the pulping heat-up period. However, the dissolved extractives diffused out of the wood chips at slower rate when the surfactants were present. This was a result of more micelles being formed by surfactants and dissolved extractives which also are surfactants.
The sodium sulfite concentration profiles in wood after cooking indicated that the surfactant mixture could increase the diffusion process by improving the swelling of the lignin fraction. It was concluded that surfactants could modify the mass transfer mechanism. However, the experiments also indicated that the diffusion of surfactants was rather slow. Compared to the cooks with the surfactants, the reaction rates of the control cooks were found to be higher. As more of the wood components got dissolved, the more porous wood structure was developed during pulping, which explains, why after certain period of time, the sodium sulfite content of the control cook was higher.
In order to obtain quantitative information on the diffusion process, the chemical profiles in wood were simulated using the diffusion model with simultaneous reactions. The simulated chemical distribution curve was adjusted to fit the measured ones by changing the effective diffusivity.
Measurements of a dynamic contact angle, as well as a diameter and volume of a droplet of pulping liquor were carried out to obtain an in-depth understanding of the surfactants behavior in pulping process. The results show that the surfactants did not improve the spreading wetting but improved the absorption. This phenomenon could not be simply explained as a function of capillary pressure, in fact, the liquor containing surfactants must have been able to disperse the air inside the wood structure and therefore to reduce the resistance of air to penetration and diffusion.
Finally, it was found that surfactants improved the pulp yield as a result of a slower reaction rate and faster diffusion rate, as less lignin condensation and carbohydrate degradation was observed.
Morin, Francois. "Mass transfer limitations in sulfite pulping with anthraquinone." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=28495.
Full textIn a heterogeneous reaction system, such as wood pulping, two main factors control the overall reaction rate: liquor penetration and chemical diffusion. As a first step, some wood characteristics affecting liquor impregnation were evaluated: 1) fiber hydraulic radius, 2) air, steam and water content, 3) wood elasticity and compressibility. Secondly, impregnation and pulping experiments were performed while varying the pre-steaming, compression and soaking time. Finally, experimental profiles were compared to computer simulated results. The two most commonly used species by the pulp industry were chosen for this study: 1) black spruce sapwood and heartwood as well as 2) trembloid poplar sapwood.
Impregnation of sulfite-AHQ liquor in wood blocks was simulated by a three-dimensional "Control Volume Finite Difference Method (CVFDM)". To de-couple the pressure and velocity fields, typical to convection-diffusion problems, a mass balance around individual control volume was performed using Poiseuille's capillary flow equation. The pulping kinetic differential equations were included into the CVFDM model to simulate a three-dimensional delignification pattern in the wood.
In general, the progression of the anthraquinone impregnation was slow and non-uniform in comparison to sulfite which penetrated rapidly and uniformly during pulping. Furthermore, delignification uniformity was related to the initial chemical profiles observed after impregnation. This confirms the importance of chemical pre-treatment for high yield pulping in order to minimize uneven delignification for chips thicker than 3mm. Results showed that, in most cases, computer simulated profiles were similar to experimental anthraquinone and sulfite impregnation patterns.
Agarwal, Niraj. "Modeling of continuous pulping /." Thesis, Connect to this title online; UW restricted, 1993. http://hdl.handle.net/1773/5564.
Full textDeshpande, Raghu. "The initial phase of sodium sulfite pulping of softwood : A comparison of different pulping options." Doctoral thesis, Karlstads universitet, Institutionen för ingenjörs- och kemivetenskaper, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-46929.
Full textThe sulfite pulping process is today practised in only a small number of pulp mills around the globe and the number of sulfite mills that use sodium as the base (cation) is less than five. However, due to the increasing interest in the wood based biorefinery concept, the benefits of sulfite pulping and especially the sodium based variety, has recently gained a lot of interest. It was therefore considered to be of high importance to further study the sodium based sulfite process to investigate if its benefits could be better utilized in the future in the production of dissolving pulps. Of specific interest was to investigate how the pulping conditions in the initial part of the cook (≥ 60 % pulp yield) should be performed in the best way. Thus, this thesis is focused on the initial phase of sodium based single stage bisulfite, acid sulfite and two-stage sulfite cooking of either 100 % spruce, 100 % pine or 100 % pine heartwood chips. The cooking experiments were carried out with either a lab prepared or a mill prepared cooking acid and the temperature and cooking time were varied. Activation energies for different wood components were investigated as well as side reactions concerning the formation of thiosulfate. LCC (Lignin carbohydrates complexes) studies were carried out to investigate the influence of different cooking conditions on lignin carbohydrate linkages.
Biasca, Karyn L. "A study of the kinetics of delignification during the early stage of alkaline sulfite anthraquinone pulping." Diss., Available online, Georgia Institute of Technology, 1989:, 1989. http://etd.gatech.edu/theses/available/ipstetd-10/biasca%5Fkl.pdf.
Full textKilian, André. "Control of an acid sulphite batch pulp digester based on a fundamental process model." Pretoria : [s.n.], 1999. http://upetd.up.ac.za/thesis/available/etd-12202006-100726/.
Full textSandrock, Carl. "Implementation and performance analysis of a model-based controller on a batch pulp digester." Diss., Pretoria : [s.n.], 2003. http://upetd.up.ac.za/thesis/available/etd-10152004-113239/.
Full textSummaries in Afrikaans and English. Includes bibliographical references (leaves 83-86) and index. Available on the Internet via the World Wide Web.
Patoine, Alain. "Détoxification d'un effluent de pâte chimico-thermomécanique par voie anaérobie /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1992. http://theses.uqac.ca.
Full textRésumé disponible sur Internet. CaQCU Bibliogr.: f. [67]-71. Document électronique également accessible en format PDF. CaQCU
Heazel, Thomas Edward. "Cell wall sulfur distribution in sulfonated southern pine latewood." Diss., Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/5786.
Full textBooks on the topic "Sulfite pulping"
International Symposium on Wood and Pulping Chemistry. 1985 International Symposium on Wood and Pulping Chemistry: Technical papers. [Vancouver: s.n., 1985.
Find full textInternational Symposium on Wood and Pulping Chemistry (9th 1997 Montreal, Quebec). ISWPC: 9th International Symposium on Wood and Pulping Chemistry, June 9-12, 1997 : oral presentations. Montreal: Technical Section, CPPA, 1997.
Find full textInternational Symposium on Wood and Pulping Chemistry (9th 1997 Montreal, Quebec). ISWPC: 9th International Symposium on Wood and Pulping Chemistry, June 9-12, 1997 : poster presentations. Montreal: Technical Section, CPPA, 1997.
Find full textInternational Sulfite Pulping Conference (1989 Seattle, Wash.). 1989 International Sulfite Pulping Conference: Westin Seattle, Seattle, WA, Oct. 25-27. Atlanta, GA: TAPPI Press, 1989.
Find full textBranch, Ontario Water Resources. The preliminary report on the second six months of process effluent monitoring in the MISA Pulp and Paper Sector (July 1, 1990 to December 31, 1990): Report. [Toronto]: Environment Ontario, 1991.
Find full textCompany, Sandwell and. Dead load reduction in the Kraft pulping process. Ottawa, Ont., Canada: Environment Canada, 1986.
Find full textLindgren, Torbjörn. Modelling of cellulose and pulp processes using spectroscopy. Umeå, Sweden: Umeå Universitet, 1995.
Find full textFricke, Arthur L. Physical properties of kraft black liquor: Interim report, phase II. Washington, D.C: [U.S. Dept. of Energy, Office of Scientific and Technical Information], 1985.
Find full textBezúch, Bohuslav. Structure of hardwood lignin and its behaviour in kraft pulping. Bratislava: Paper and Pulp Research Institute, 1987.
Find full textKraft Pulping Short Course (2001 Louisville, Kentucky). 2001 Kraft Pulping Short Course: Seelbach Hilton Hotel, Louisville, KY, May 7-10, 2001. Atlanta, Georgia: TAPPI Press, 2001.
Find full textBook chapters on the topic "Sulfite pulping"
Paridah, M. T., Amin Moradbak, A. Z. Mohamed, Folahan Abdulwahab Taiwo Owolabi, Mustapha Asniza, and H. P. Shawkataly Abdul Khalil. "Alkaline Sulfite Anthraquinone and Methanol (ASAM) Pulping Process of Tropical Bamboo (Gigantochloa scortechinii)." In Bamboo - Current and Future Prospects. InTech, 2018. http://dx.doi.org/10.5772/intechopen.76806.
Full text"Failure of a Type 317L Stainless Steel Clad Bottom Cone of an Acid Sulfite Pulping Batch Digester." In Handbook of Case Histories in Failure Analysis, 198–200. ASM International, 1992. http://dx.doi.org/10.31399/asm.fach.v01.c9001069.
Full textReports on the topic "Sulfite pulping"
Integration of the Mini-Sulfide Sulfite Anthraquinone (MSS-AQ) Pulping Process and Black Liquor Gasification in a Pulp Mill. Office of Scientific and Technical Information (OSTI), January 2010. http://dx.doi.org/10.2172/970980.
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