Dissertation > Industrial Technology > Chemical Industry > Pigment Industry > Color pigments

Hydrolysis of Titanium Sulfate Solution Via Ultrasonic Irradiation

Author WuPan
Tutor ZhangZhao
School Sichuan University
Course Chemical processes
Keywords Titanyl sulfate Hydrolysis Ultrasonic wave Anatase Crystal structure Characterization
Type Master's thesis
Year 2004
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The titanium dioxide is one of the most important products of the titanium-based . Its physical and chemical properties of stable , non-toxic , tasteless , and has excellent optical and electrical properties and excellent pigment performance , a wide range of applications in the chemical industry, metallurgy , electronics industry . Titanium dioxide production methods are mainly divided into the sulfate and chlorination two . Currently in China , sulfuric acid method to produce titanium dioxide occupy a major position . Panzhihua, Sichuan Panzhihua Iron and Steel Group in the production of titanium dioxide to sulfuric acid method titanium dioxide . In the process of production by the sulfuric acid method , hydrolysis of the titanyl sulfate solution is the most important step . Authigenic crystal kinds of titanyl sulfate, titanium solution hydrolysis process , the introduction of 40KHz , 100W ultrasonic role , using XRD, SEM, EDS and TEM and other modern test technology hydrolyzate carried characterization , investigated ultrasonic of titanyl sulfate, titanium solution hydrolysis process of impact. The experiments show that anatase titanium dioxide aqueous hydrolyzate liquid titanium ultrasonic field remains . When the hydrolysis is conducted in the temperature of the titanium solution for about 96 ℃ , applying ultrasonic waves to the hydrolysis rate of 2% -3% . The titanium liquid boiling temperature , whether the gap between the ultrasonic obvious , hydrolysis rate reached more than 97% . And without ultrasound hydrolyzate phase comparison, the lower ultrasonic field under the action of a hydrolyzate of the degree of particle aggregation , particle morphology comparison rule , the particles are uniformly dispersed . After the ultrasonic wave is applied , have a 25% reduction in the sulfur content in the hydrolyzate . The boiling titanium liquid hydrolyzate XRD analysis results show that ultrasound is applied , cell parameters C from 0.9464nm reduce the 0.9103nm . Whether the ultrasonic action , the grain size of hydrolyzate were 3.0nm and 3.3nm after calcined grew as 8.8nm and 10.1nm . After calcination of the hydrolyzate , the performance of the ultrasonic effect of average particle size is significantly reduced, without ultrasound no change . The paper combines the characteristics of ultrasound were analyzed to explore the mechanism of ultrasonic the titanium liquid hydrolysis process , the results indicate that ultrasonic can promote the the titanium solution of hydrolysis , and affect the formation of crystals , resulting in grain refinement , calcined relatively thin particles.

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