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Preparation method of titanium dioxide with high specific surface area

A technology of titanium oxychloride and titanium tetrachloride, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of high production cost, poor product quality, environmental pollution, etc., to prevent agglomeration, prevent particle agglomeration, high purity effect

Active Publication Date: 2014-11-19
仙桃市中星电子材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention mainly solves the technical problems existing in the production of titanium dioxide in the

Method used

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  • Preparation method of titanium dioxide with high specific surface area
  • Preparation method of titanium dioxide with high specific surface area

Examples

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Example Embodiment

[0014] Example 1: Add 3mol of titanium tetrachloride slowly to 1L of deionized water to dissolve, and control the dissolution to stabilize below 60°C to obtain a 3mol / L titanium oxychloride solution; under continuous stirring, 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; gradually increase the temperature to 70°C, add 9mol / L liquid ammonia to the above solution; gradually After heating to 90°C, holding for 2 hours to obtain a metatitanic acid gel, which is filtered to obtain a metatitanic acid filter cake; add the filter cake to the calciner for calcination, control the calcination temperature at 750°C, and take it out after calcination for 2 hours , Pulverize and pass through a screen of more than 60 meshes to obtain titanium dioxide powder; after adding the above powder to a ball mill for ball milling 20 times, it is screened through an 80-mesh screen, and those that...

Example Embodiment

[0016] Example 2: Add 3.2 mol of titanium tetrachloride slowly to 1L of deionized water to dissolve, and control the stability of the dissolution to be below 60°C to obtain a 3.2mol / L titanium oxychloride solution; under the condition of continuous stirring, Add a mixture of polyvinyl alcohol, ethanolamine, citric acid, and triol silane (1:2:1:2) with a total mass of 6‰ to the solution; when the temperature is gradually increased to 70°C, add 9.1mol / L to the above solution Ammonia; Gradually increase the temperature to 92°C and keep it for 3 hours to obtain a metatitanic acid gel, which is then filtered to obtain a metatitanic acid filter cake; add the filter cake to the calcining furnace for calcination, control the calcination temperature at 800°C, and calcine 3 After hours, take it out, pulverize, and pass through a screen of more than 60 meshes to obtain titanium dioxide powder; after adding the above powder to a ball mill for 20 times, it is screened by an 80-mesh screen, a...

Example Embodiment

[0018] Example 3: Add 3.5mol of titanium tetrachloride slowly to 1L of deionized water to dissolve, and control the stability of the dissolution to be below 60°C to obtain a 3.5mol / L titanium oxychloride solution; under continuous stirring conditions, Add a mixture of polyvinyl alcohol, ethanolamine, citric acid, and triolsilane (1:2:1:2) with a total mass of 7‰ to the solution; when the temperature is gradually increased to 70°C, add 9.2mol / L of liquid to the above solution Ammonia; After gradually raising the temperature to 95°C, keep it for 4 hours to obtain a metatitanic acid gel, and obtain a metatitanic acid filter cake by pressure filtration; add the filter cake to the calcination furnace for calcination, control the calcination temperature at 900°C, and calcine 4 After hours, take it out, pulverize, and pass through a screen of more than 60 meshes to obtain titanium dioxide powder; after adding the above powder to a ball mill for 20 times, it is screened by an 80-mesh sc...

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Abstract

The invention relates to a preparation method of titanium dioxide with high specific surface area. The preparation method comprises the following steps of: firstly dissolving titanium tetrachloride serving as raw material in deionized water; adding liquid ammonia and additives (polyvinyl alcohol, ethanolamine, citric acid and triol silane) for hydrolysis to generate gel; and then carrying out filter pressing, calcining, ball milling, screening, washing and drying, thus obtaining the titanium dioxide powder with high specific surface area. The preparation method of the titanium dioxide with high specific surface area is simple in technology and low in cost; the quality of the obtained titanium dioxide product is stable, and the specific surface area of the titanium dioxide is 25-35m<2>/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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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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