Effect of HCl and H2SO4 on SiO2 coating of rutile titanium dioxide

Liu Chan; Lu Ruifang; Yang Fang; Cheng Xiaozhe

doi:10.7513/j.issn.1004-7638.2021.01.010

Volume 42 Issue 1

Feb. 2021

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Liu Chan, Lu Ruifang, Yang Fang, Cheng Xiaozhe. Effect of HCl and H2SO4 on SiO2 coating of rutile titanium dioxide[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(1): 60-64. doi: 10.7513/j.issn.1004-7638.2021.01.010

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Liu Chan, Lu Ruifang, Yang Fang, Cheng Xiaozhe. Effect of HCl and H₂SO₄ on SiO₂ coating of rutile titanium dioxide[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(1): 60-64. doi: 10.7513/j.issn.1004-7638.2021.01.010

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Effect of HCl and H₂SO₄ on SiO₂ coating of rutile titanium dioxide

doi: 10.7513/j.issn.1004-7638.2021.01.010

1.
State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Pangang Group Research Institute Co., Ltd., Panzhihua 617000, Sichuan, China
2.
School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400030, China

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Received Date: 2020-08-18
Publish Date: 2021-02-10

Abstract

Abstract

Using sodium silicate as the coating agent for rutile titanium dioxide from chlorination process, the relationship between the pigmentary properties of the coated titanium dioxide and the addition amount of hydrochloric acid used for pH adjustment during the coating process, was investigated firstly. The results show that with increase of the hydrochloric acid addition, the brightness, whiteness L value and blue whiteness of the titanium dioxide decrease, while the blue phase indexes (e.g. Scx and b value) of the titanium dioxide are improved gradually. Subsequently, the homogeneity and compactness of the silicon dioxide coating layer, pigmentary and application properties of the titanium dioxide from sulfuric acid and hydrochloric acid systems were compared and analyzed. A better homogeneity and compactness coupled with a higher glossiness of the silicon dioxide coating layer can be obtained for titanium dioxide from sulfuric acid system, while the titanium dioxide from hydrochloric acid system has a better blue phase.
- rutile TiO₂,
- inorganic coating,
- HCl,
- H₂SO₄,
- pigmentary properties

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References(9)

References

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