scholarly journals Effects of hydrolysis conditions for rutile TiO2 white pigment preparation via short sulfate process

2021 ◽  
Author(s):  
Congxue Tian ◽  
Gaoqing Zhang
Keyword(s):  
White Pigment ◽  
Rutile Tio2 ◽  
Sulfate Process ◽  
Hydrolysis Conditions

Concentration of TiOSO4 on Rutile White via Short Sulfate Process

2014 ◽  
Vol 968 ◽  
pp. 40-43 ◽  
Author(s):  
Cong Xue Tian
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Raw Material ◽  
Thermal Hydrolysis ◽  
High Quality ◽  
White Pigment ◽  
Hydrolysis Process ◽  
Sulfate Process ◽  
Favorable Structure

Short sulfate process was developed to produce rutile TiO2 white pigment by using low concentration industrial TiOSO4 solution as raw material via self-generated seeded thermal hydrolysis route. The concentration of TiOSO4 solution had significantly influenced the structure and pigment properties of rutile TiO2 white pigment. The samples were characterized by XRD, particle size distribution and pigment properties test. Appropriate concentration of TiOSO4 was beneficial to promoting hydrolysis process in a proper way and obtaining favorable structure and high quality white pigment. The optimized concentration of TiOSO4 solution was of 191.20 g/L.

Influences of Hydrolysis Temperature and Hydrolysis Time on Titanium White Pigment via Short Sulfate Process

2012 ◽  
Vol 602-604 ◽  
pp. 1255-1260 ◽  
Author(s):  
Cong Xue Tian ◽  
Shuang Hua Huang ◽  
Ying Yang
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Boiling Point ◽  
Hydrolysis Rate ◽  
Narrow Particle Size Distribution ◽  
Hydrolysis Time ◽  
White Pigment ◽  
Hydrolysis Temperature ◽  
Sulfate Process

Using low concentration TiOSO4 as titanium raw material, anatase white pigment was prepared by self seeded thermal hydrolysis route via short sulfate process. The effects of hydrolysis temperature and hydrolysis time on the structure and pigment properties of the as-prepared samples were investigated. The samples were characterized by XRD, particle size distribution and pigment properties test. The hydrolysis temperature and time had great effects on the hydrolysis rate, particle size distribution, crystal growth and particle aggregation of TiO2, eventually determined the pigment structure and its pigment properties. The optimized hydrolysis temperature was at faint boiling point, and the hydrolysis time after second boiling point was of 2.5h. Anatase white pigment was appropriate particle size, narrow particle size distribution and good pigment properties.

Effects of Hydrolysis Parameters on TiO2 White Pigment from Low Concentration Industrial TiOSO4 Solution via Sulfate Process

2012 ◽  
Vol 602-604 ◽  
pp. 1243-1249 ◽  
Author(s):  
Cong Xue Tian
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Aging Time ◽  
Volume Ratio ◽  
Narrow Particle Size Distribution ◽  
Water Volume ◽  
White Pigment ◽  
Anatase Titania ◽  
Sulfate Process

Short sulfate process was developed to produce TiO2 white by using unconcentrated industrial TiOSO4 solution as raw material. Herein, anatase titania white pigment was prepared by self-generated seeded thermal hydrolysis route. The effects of hydrolysis parameters (such as pre-adding water volume ratio, F value and aging time) on the structure and pigment properties of the as-prepared samples were investigated. The samples were characterized by XRD, particle size distribution, SEM and pigment properties test. These factors influenced the number and quality of the hydrolysis nuclei, hydrolysis velocity, crystal growth rate and the particles aggregation, eventually determined its structure and pigment properties. The optimized pre-adding water volume ratio was of 0.18:1, the F value was of 1.95 and the aging time after turning-grey-color point was of 20~30 min, and the prepared TiO2 was with anatase phase, narrow particle size distribution and excellent pigment properties.

Effects of Initial Feed Speed of 1 Min on Rutile White Pigment Production via Short Sulfate Process

2014 ◽  
Vol 1030-1032 ◽  
pp. 61-64
Author(s):  
An Bing Liang ◽  
Shuang Hua Huang ◽  
Hong Pu ◽  
Cong Xue Tian ◽  
Hua Chen
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Raw Materials ◽  
Feed Speed ◽  
White Pigment ◽  
Hydrolysis Process ◽  
Feeding Speed ◽  
Sulfate Process ◽  
Titanium White

Hydrolysis is one of the crucial steps in the product of titanium white pigment via sulfate process, and determines quality of the final products. Feed Speed have important effect to the quality and the numbers of seeds of early hydrolyzing. Using low concentration TiOSO4 as raw materials, fine rutile white titanium pigment was prepared by optimizing the key parameters of the hydrolysis process via the achromatic force and the level of whiteness of the samples. The samples were characterized by SEM, particle size distribution and pigment properties test. Resultes have shown that the feeding speed of 1 min is 1.1times to the speed after 1 min. In this conditions, the obtained titanium white pigment showed better pigment performance.

Effects of Concentration of TiOSO4 and Fe/TiO2 Ratio on TiO2 Anatase White Pigment Production via Short Sulfate Process

2013 ◽  
Vol 634-638 ◽  
pp. 391-396 ◽  
Author(s):  
Cong Xue Tian ◽  
Shuang Hua Huang ◽  
Ying Yang
Keyword(s):  
Crystal Structure ◽  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Narrow Particle Size Distribution ◽  
Crystal Formation ◽  
Aggregation Process ◽  
Thermal Hydrolysis ◽  
White Pigment ◽  
Sulfate Process

Using unconcentrated TiOSO4 solution from sulfate process as titanium source, anatase TiO2 white pigment was prepared by self-generating seed thermal hydrolysis route via short sulfate process. The effects of concentration of TiOSO4 solution and Fe/TiO2 ratio on the structure and pigment properties of the TiO2 white pigments were investigated. The samples were characterized by XRD, particle size distribution and pigment properties test. The concentration of TiOSO4 solution and Fe/TiO2 ratio had great effects on the super-saturation of TiO2+, crystal formation, nucleation, crystallization and aggregation process, eventually determined the crystal structure, particle size distribution and its pigment properties. The optimized concentration of TiOSO4 solution was of 195 g/L, and the Fe/TiO2 ratio was at 0.30.The as-prepared anatase white pigment was appropriate particle size, narrow particle size distribution and good pigment properties.

Hydrolysis Time on Rutile TiO2 White Pigment via Short Sulfate Process

2014 ◽  
Vol 968 ◽  
pp. 36-39
Author(s):  
Cong Xue Tian
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Hydrolysis Rate ◽  
Narrow Particle Size Distribution ◽  
Thermal Hydrolysis ◽  
Structure And Properties ◽  
Hydrolysis Time ◽  
White Pigment ◽  
Sulfate Process

Rutile TiO2 white pigment was prepared by self-seeded thermal hydrolysis route via short sulfate process from low concentration TiOSO4 solution. Hydrolysis time had significantly influenced the structure and pigment properties of rutile TiO2. The samples were characterized by XRD, particle size distribution and pigment properties test. The hydrolysis time had great influences on the hydrolysis rate, particle size distribution, crystal growth and particle aggregation of TiO2, eventually determined the pigment structure and properties. The optimized hydrolysis time after second boiling point was of 2.5h. And the prepared rutile TiO2 white pigment was with narrow particle size distribution and nice pigment properties.

Titanium dioxide pigments

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Gerhard Pfaff
Keyword(s):  
Titanium Dioxide ◽  
Surface Treatment ◽  
Organic Matrix ◽  
Visible Range ◽  
White Pigment ◽  
Application System ◽  
Application Systems ◽  
Sulfate Process ◽  
Weather Resistance ◽  
The Stability

Abstract Titanium dioxide (TiO2) is by far the most important white pigment. The extraordinary scattering behavior of TiO2 together with the lack of absorption in the visible range and the stability in different application systems is the reason why TiO2 is the most commonly used pigment. Of the three TiO2 modifications, only rutile and anatase play a role for pigment uses, whereas brookite has no technical importance. Two main processes are used for the production of TiO2 pigments, the sulfate process and the chloride process. Many TiO2 pigments are equipped with an additional surface treatment (aftertreatment) to improve weather resistance and lightfastness of the pigment itself and of the pigmented organic matrix. A second aim of the surface treatment is the improvement of the dispersibility of the pigments in the application system.

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