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Relevant bibliographies by topics / Titanium sulphate. Titanium dioxide

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Journal articles

Academic literature on the topic 'Titanium sulphate. Titanium dioxide'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Titanium sulphate. Titanium dioxide"

1

Gordienko, P. S., V. A. Dostovalov, and E. V. Pashnina. "Hydrofluoride Method of Complex Processing of Titanium-Containing Raw Materials." Solid State Phenomena 265 (September 2017): 542–47. http://dx.doi.org/10.4028/www.scientific.net/ssp.265.542.

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The use of titanium dioxide is so diverse that varies from food to heavy industry and it is the main substance in the titanium industry. Over 90% of the world's mined titanium concentrates are processed to produce pigments. The sources for the production of titanium dioxide are the typically used titanium-containing ores including minerals rutile, ilmenite, and others. The volume of world production of titanium dioxide pigment exceeds 5 million tons per year and it is carried out in two ways: sulphate and chlorine (in approximately equal volumes). The changed approach to the green production processes requires the improvement of existing technologies and the development of new methods for processing titanium-containing raw materials. The authors have experimentally confirmed the high efficiency of complex, waste-free processing of titanium-containing raw materials developed by hydrofluoride. Creating pigment production on the basis hydrofluoride method will meet not only the domestic needs but also offer thepigment for export, as its parameters will surpass those of the best world analogues.

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2

Grzmil, Barbara, Daniel Grela, and Bogumił Kic. "Effects of processing parameters on hydrolysis of TiOSO4." Polish Journal of Chemical Technology 11, no. 3 (2009): 15–21. http://dx.doi.org/10.2478/v10026-009-0030-1.

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Effects of processing parameters on hydrolysis of TiOSO4 The influence of both TiOSO4 concentrations in the starting solution and a way of conducting hydrolysis on the degree of titanyl sulphate conversion to hydrated titanium dioxide were studied. Titanyl sulphate solution, an intermediate product in the commercial preparation of titanium dioxide pigments by sulphate method, was used. The continuous method of conducting hydrolysis was applied using one or two reactors connected in series. It was found that the degree of hydrolysis markedly depends on the studied parameters. It was also found that TiOSO4 hydrolysis using the continuous method should be conducted: i) at a possibly low concentration of free sulfuric acid in the solution and; ii) in two or more rectors connected in series.

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3

Sumisha, Anappara, Gangasalam Arthanareeswaran, Ahmad Fauzi Ismail, Dharani Praveen Kumar, and Muthukonda V. Shankar. "Functionalized titanate nanotube–polyetherimide nanocomposite membrane for improved salt rejection under low pressure nanofiltration." RSC Advances 5, no. 49 (2015): 39464–73. http://dx.doi.org/10.1039/c5ra03520a.

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Copper functionalised titanium dioxide (Cu-TNT) nanotubes dispersed polyetherimide (PEI mixed matrix membrane showed a better salt rejection of salts solution of potassium sulphate (K<sub>2</sub>SO<sub>4</sub>), sodium chloride (NaCl) and calcium chloride (CaCl<sub>2</sub>).

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4

Gázquez, Manuel Jesús, Manuel Contreras, Silvia María Pérez-Moreno, Jose Luis Guerrero, Melquiades Casas-Ruiz, and Juan Pedro Bolívar. "A Review of the Commercial Uses of Sulphate Minerals from the Titanium Dioxide Pigment Industry: The Case of Huelva (Spain)." Minerals 11, no. 6 (2021): 575. http://dx.doi.org/10.3390/min11060575.

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This study was focused on the historical evolution of the waste management policy carried out by the Spanish industry devoted to titanium dioxide pigments manufacturing for minimising its environmental impact. This challenge was achieved by modifying the original chemical process and converting the originally dissolved sulphate and sulphuric acid present in the final streams of the factory into sulphate minerals (melanterite FeSO4·7H2O, szomolnokite FeSO4·H2O, and gypsum CaSO4·2H2O). These by-products were physicochemically, mineralogically and radiologically characterised in order to gain basic information for its subsequent commercial use. Some of the uses summarised in this study for both ferrous sulphates are as a supplier of iron to prevent chlorosis, animal food, manufacture of cement (to reduce Cr VI), primary flocculants for ferrous sulphates, magnetite nanoparticle and nano-Fe2O3 formation, production of magnetite concentrate, remediation of polluted soils with metals, and treatment of wastewaters. Red gypsum was analysed as a substitute for natural gypsum in the manufacture of cement, construction materials, inhibitor in soil erosion, and the immobilisation of heavy metals in agricultural soils and carbonation processes.

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5

Ricceri, Riccardo. "ADSORPTION OF POLYSTYRENE SULPHONATE AND CETYLTRIMETHYLAMMONIUM ON TITANIUM DIOXIDE." Journal of Dispersion Science and Technology 18, no. 3 (1997): 251–60. http://dx.doi.org/10.1080/01932699708943734.

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6

Vondruska, M., V. Bednarik, and M. Sild. "Stabilization/solidification of waste ferrous sulphate from titanium dioxide production by fluidized bed combustion product." Waste Management 21, no. 1 (2001): 11–16. http://dx.doi.org/10.1016/s0956-053x(00)00075-1.

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7

Ginsberg, T., M. Modigell, and W. Wilsmann. "Thermochemical characterisation of the calcination process step in the sulphate method for production of titanium dioxide." Chemical Engineering Research and Design 89, no. 7 (2011): 990–94. http://dx.doi.org/10.1016/j.cherd.2010.11.006.

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8

Ayre, Wayne Nishio, Nicole Scully, Carole Elford, et al. "Alternative radiopacifiers for polymethyl methacrylate bone cements: Silane-treated anatase titanium dioxide and yttria-stabilised zirconium dioxide." Journal of Biomaterials Applications 35, no. 10 (2021): 1235–52. http://dx.doi.org/10.1177/0885328220983797.

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Poly (methyl methacrylate) (PMMA) bone cement is widely used for anchoring joint arthroplasties. In cement brands approved for these procedures, micron-sized particles (usually barium sulphate, BaSO4) act as the radiopacifier. It has been postulated that these particles act as sites for crack initiation and subsequently cement fatigue. This study investigated whether alternative radiopacifiers, anatase titanium dioxide (TiO2) and yttria-stabilised zirconium dioxide (ZrO2), could improve the in vitro mechanical, fatigue crack propagation and biological properties of polymethyl methacrylate (PMMA) bone cement and whether their coating with a silane could further enhance cement performance. Cement samples containing 0, 5, 10, 15, 20 and 25%w/w TiO2 or ZrO2 and 10%w/w silane-treated TiO2 or ZrO2 were prepared and characterised in vitro in terms of radiopacity, compressive and bending strength, bending modulus, fatigue crack propagation, hydroxyapatite forming ability and MC3T3-E1 cell attachment and viability. Cement samples with greater than 10%w/w TiO2 and ZrO2 had a similar radiopacity to the control 10%w/w BaSO4 cement and commercial products. The addition of TiO2 and ZrO2 to bone cement reduced the bending strength and fracture toughness and increased fatigue crack propagation due to the formation of agglomerations and voids. Silane treating TiO2 reversed this effect, enhancing the dispersion and adhesion of particles to the PMMA matrix and resulted in improved mechanical properties and fatigue crack propagation resistance. Silane-treated TiO2 cements had increased nucleation of hydroxyapatite and MC3T3-E1 cell attachment in vitro, without significantly compromising cell viability. This research has demonstrated that 10%w/w silane-treated anatase TiO2 is a promising alternative radiopacifier for PMMA bone cement offering additional benefits over conventional BaSO4 radiopacifiers.

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9

Krysenko, G. F., D. G. Epov, M. A. Medkov, and E. B. Merkulov. "Studying of possibility for breakdown of ilmenite concentrate with ammonium sulphate." Kompleksnoe Ispolʹzovanie Mineralʹnogo syrʹâ/Complex Use of Mineral Resources/Mineraldik Shikisattardy Keshendi Paidalanu 4, no. 312 (2020): 22–30. http://dx.doi.org/10.31643/2020/6445.03.

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The data on investigation of the possibility of breakdown of ilmenite concentrate of the Ariadnensky deposit in Primorsky Krai with ammonium sulfate are presented in the article. For study the ilmenite concentrate and ammonium sulfate interaction, the concentrate and (NH4)2SO4 were mixed based on the formation of sulfates of the main components of the concentrate and then double sulfates of the components of the concentrate and ammonium. The interaction was carried out in glassy carbon crucibles, which were placed in a muffle furnace controller company Nabertherm GmbH (Germany). The weight of sample was 10–40 g. Thermogravimetry, X-ray diffraction and atomic absorption analyses were used in the study. It was found that when the temperature of thermal decomposition of (NH4)2SO4 (3000С) is reached, the interaction of the main components of the concentrate with (NH4)2SO4 begins and proceeds in the temperature range of 300-3600С with the formation of a mixture of double salts well soluble in water - ammonium sulfate and iron compounds (NH4)2Fe2(SO4)3 and NH4Fe(SO4)2 and ammonium sulfate and titanyl of the composition (NH4)2TiO(SO4)2. The interaction at a temperature above 3600С leads to thermal decomposition of the formed double sulfates of ammonium and titanyl and ammonium and iron to sulfates and then oxides. It was shown that water leaching of the product of the interaction of ilmenite concentrate with (NH4)2SO4 at 3600С allows to extract practically all titanium and the bulk of iron to water in the form of well soluble double salts. The conditions for the titanium dioxide separation in the form of anatase from the water leaching solution were found.

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10

Suppiah, S., and D. L. Burns. "Hydrogen sulphide oxidation over teflon treated activated alumina and titanium dioxide catalysts." Canadian Journal of Chemical Engineering 71, no. 5 (1993): 704–10. http://dx.doi.org/10.1002/cjce.5450710508.

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