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Preparation method of titanium dioxide with high specific surface area

A high specific surface area, titanium dioxide technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of poor product quality, high production cost, environmental pollution, etc., and achieve the effect of preventing particle aggregation, preventing agglomeration, and high purity

Active Publication Date: 2016-10-19
仙桃市中星电子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention mainly solves the technical problems existing in the production of titanium dioxide in the prior art, such as complicated process, serious environmental pollution, high production cost and poor product quality.

Method used

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  • Preparation method of titanium dioxide with high specific surface area

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1: Slowly add 3 mol of titanium tetrachloride to 1 L of deionized water to dissolve, control the dissolution to be stable below 60 ° C, and obtain a 3 mol / L titanium dioxychloride solution; under continuous stirring conditions, add to the above solution Add a mixture of polyvinyl alcohol, ethanolamine, citric acid and triol silane (1:2:1:2) with a total mass of 5‰ of the solution; when the temperature is gradually raised to 70°C, add 9mol / L liquid ammonia to the above solution; gradually After heating up to 90°C, keep it warm for 2 hours to obtain metatitanic acid gel, and obtain a metatitanic acid filter cake by pressure filtration; put the above filter cake into a calciner for calcining, control the calcining temperature to 750°C, and take it out after calcining for 2 hours , pulverized, and passed through a sieve of more than 60 mesh to obtain titanium dioxide powder; after adding the above powder into a ball mill for ball milling for 20 times, it was screened...

Embodiment 2

[0016] Example 2: Slowly add 3.2 mol of titanium tetrachloride to 1 L of deionized water for dissolution, and control the dissolution to stabilize below 60° C. to obtain a 3.2 mol / L titanium dioxychloride solution; Add a mixture of polyvinyl alcohol, ethanolamine, citric acid and triol silane (1:2:1:2) to the solution with a total mass of 6‰; when the temperature is gradually raised to 70°C, add 9.1mol / L liquid Ammonia; after gradually raising the temperature to 92°C, keep it warm for 3 hours to obtain metatitanic acid gel, and obtain a metatitanic acid filter cake by pressure filtration; add the above filter cake to a calciner for calcining, control the calcining temperature to 800°C, and calcined for 3 Take it out after 1 hour, crush it, and pass through a sieve of 60 mesh or more to obtain titanium dioxide powder; add the above powder into a ball mill for 20 times of ball milling, pass through a 80-mesh sieve, and put the powder that cannot pass through the sieve into the ba...

Embodiment 3

[0018] Example 3: Slowly add 3.5 mol of titanium tetrachloride into 1 L of deionized water for dissolution, and control the dissolution to stabilize below 60°C to obtain a 3.5 mol / L titanium dioxychloride solution; Add a mixture of polyvinyl alcohol, ethanolamine, citric acid and triol silane (1:2:1:2) with a total mass of 7‰ to the solution; when the temperature is gradually raised to 70°C, add 9.2mol / L liquid Ammonia; after gradually raising the temperature to 95°C, keep it warm for 4 hours to obtain metatitanic acid gel, and obtain a metatitanic acid filter cake by pressure filtration; add the above filter cake to a calciner for calcining, control the calcining temperature to 900°C, and calcined for 4 Take it out after 1 hour, crush it, and pass through a sieve of 60 mesh or more to obtain titanium dioxide powder; add the above powder into a ball mill for 20 times of ball milling, pass through a 80-mesh sieve, and put the powder that cannot pass through the sieve into the ba...

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Abstract

A preparation method of titanium dioxide with a high specific surface area is to use titanium tetrachloride as raw material, first dissolve titanium tetrachloride in deionized water, add liquid ammonia, additives (polyvinyl alcohol, ethanolamine, citric acid, triol silane) to make The gel is hydrolyzed, and then press-filtered, calcined, ball-milled, screened, washed and dried to obtain the required high specific surface area titanium dioxide powder. The preparation method has simple process and low cost, and the obtained product has stable quality, and the specific surface area of ​​the titanium dioxide powder is between 25-35㎡ / g.

Description

technical field [0001] The invention relates to a method for preparing titanium dioxide, in particular to a method for preparing titanium dioxide with a high specific surface area. Background technique [0002] Titanium dioxide (titanium dioxide) is widely used in coatings, paper coatings and fillers, plastics and other fields. In particular, nano-titanium dioxide can also be used in the fields of new materials such as electronic materials, denitrification catalysts, and photoelectric catalysts. There are three crystal forms of carbon dioxide: anatase phase, rutile phase and brookite phase. Generally, the anatase phase titanium dioxide has high catalytic activity, and the catalysts supported by titanium dioxide in industry usually have an anatase phase structure or a mixed phase structure of anatase and rutile. As a catalyst reaction site, titanium dioxide is generally required to have a larger specific surface area to provide more active sites. Titanium dioxide with a hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/047
Inventor 赵中友吴兵生陈连章黄敏资美勇张国瑞肖银华
Owner 仙桃市中星电子材料有限公司
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