A new method for production of titanium dioxide pigment

被引：128

作者：

Middlemas, Scott ^{[1
]}

Fang, Z. Zak ^{[1
]}

Fan, Peng ^{[1
]}

机构：

[1] Univ Utah, Dept Met Engn, Salt Lake City, UT 84112 USA

来源：

HYDROMETALLURGY | 2013年 / 131卷

关键词：

Titanium dioxide; Slag roasting; Energy reduction; Solvent extraction; EXTRACTION; KINETICS; SLAG;

D O I：

10.1016/j.hydromet.2012.11.002

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Titanium dioxide (TiO2) has been widely used as pigment in paints, paper and cosmetic products, as well as high-tech applications such as solar cells, semiconductors, biomedical devices and air purification. TiO2 pigment is primarily produced by a high temperature chloride process, which forms CO2 as a reaction byproduct. A novel hydrometallurgical process for making TiO2 pigment without direct CO2 emission is investigated. The novel process involves alkaline roasting of titania slag, with subsequent washing, leaching, solvent extraction, hydrolysis, and calcination stages, resulting in high-purity anatase or rutile pigments. Experimental validation for each of the processing steps is demonstrated. Pigment whiteness is critically sensitive to trace amounts of discoloring impurities such as iron. The use of solvent extraction proved to be highly effective in reducing the concentration of discoloring impurities in the final pigment to commercially acceptable levels. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：107 / 113

页数：7

共 27 条

[1]

Balderson G.F., 1999, US Patent, Patent No. [5 885 324, 5885324]

[2]

Barksdale J., 1966, TITANIUM ITS OCCURRE, P256

[3]

Bauer G., 1996, ULLMANNS ENCY IND A, VA27, P367

[4]

Borowiec K., 1998, US Patent, Patent No. [5,830,420, 5830420]

[5]

European Commission, 2007, INT POLL PREV CONTR, P103

[6]

Fang Z.Z., 2011, Production of Titanium Dioxide Pigments, Patent No. [PCT/US2011/067583, 2011067583]

[7] Extraction of titanium(IV) from aqueous hydrochloric acid solutions into alamine 336-m-xylene mixtures [J].

Filiz, Mehmet ;

Sayar, Ahmet Alp .

CHEMICAL ENGINEERING COMMUNICATIONS, 2006, 193 (09) :1127-1141

[8]

Foley E., 1970, J. Solid State Chem, V1, P566

[9]

Gambogi J., 2010, USGS MINERAL COMMODI, P172

[10] Photoelectrochemical cells [J].

Grätzel, M .

NATURE, 2001, 414 (6861) :338-344

← 1 2 3 →