Preparation method of anatase titanium dioxide

An anatase titanium dioxide, anatase technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of high corrosion resistance, polluted environment, multi-operation steps of crystal transformation, etc., and achieves simple and reliable operation. control effect

An anatase titanium dioxide, anatase technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of high corrosion resistance, polluted environment, multi-operation steps of crystal transformation, etc., and achieves simple and reliable operation. control effect

CN109911931AInactive Publication Date: 2019-06-21正太新材料科技有限责任公司
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  • Preparation method of anatase titanium dioxide
  • Preparation method of anatase titanium dioxide
  • Preparation method of anatase titanium dioxide

Examples

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Embodiment 1

[0046] A preparation method of anatase titanium dioxide, comprising the following steps:

[0047] S1. First add sodium sulfate and sodium hexametaphosphate to 100ml of deionized water, and preheat it to 94°C under stirring conditions to obtain a preheated bottom liquid.

[0048] Among them, with SO 4 2- Calculated, the concentration of sodium sulfate in the bottom liquid is 0.5mol / L; 2 o 5 Calculated, the concentration of sodium hexametaphosphate in the bottom liquid is 0.5mol / L.

[0049] S2. Preheat 400ml of titanyl chloride aqueous solution to 94°C, and add it to the preheated bottom water within 17 minutes, continue to heat up to 100°C, keep warm for 2.5 hours, cool and separate by suction filtration to obtain anatase Hydrated titanium dioxide and hydrochloric acid, recovery of hydrochloric acid.

[0050] Among them, TiO 2 Calculated, the concentration of titanyl chloride in the titanyl chloride aqueous solution is 250g / L.

[0051] S3. The anatase-type hydrated titan...

Embodiment 2

[0054] A preparation method of anatase titanium dioxide, comprising the following steps:

[0055] S1. First, add potassium sulfate and sodium pyrophosphate to 100ml of deionized water, and heat it to 100°C with stirring to obtain a preheated bottom liquid.

[0056] Among them, with SO 4 2- Calculated, the concentration of potassium sulfate in the bottom liquid is 0.1mol / L; 2 o 5 The concentration of sodium pyrophosphate in the bottom liquid is 1mol / L.

[0057] S2. Preheat 300ml titanium oxychloride aqueous solution to 90°C, and add it to the preheated bottom water within 15 minutes, continue to heat up to 90°C, keep warm for 2 hours, cool and separate by suction filtration to obtain anatase Hydrated titanium dioxide and hydrochloric acid, recovery of hydrochloric acid.

[0058] Among them, TiO 2 Calculated, the concentration of titanyl chloride in the titanyl chloride aqueous solution is 250g / L.

[0059] S3. The anatase-type hydrated titanium dioxide is subjected to sal...

Embodiment 3

[0061] A preparation method of anatase titanium dioxide, comprising the following steps:

[0062] S1. First, add sodium sulfate and sodium orthophosphate to 100ml of deionized water, heat it to 98°C under stirring conditions, and obtain a preheated bottom liquid.

[0063] Among them, with SO 4 2- Calculated, the concentration of sodium sulfate in the bottom liquid is 1mol / L; 2 o 5 Calculated, the concentration of sodium orthophosphate in the bottom liquid is 0.1mol / L.

[0064] S2. Preheat 500ml of titanyl chloride aqueous solution to 98°C, and add it to the preheated bottom water within 20 minutes, continue to heat up to 110°C, keep warm for 3 hours, cool and separate by suction filtration to obtain anatase Hydrated titanium dioxide and hydrochloric acid, recovery of hydrochloric acid.

[0065] Among them, TiO 2 Calculated, the concentration of titanyl chloride in the titanyl chloride aqueous solution is 250g / L.

[0066] S3. Put the anatase-type hydrated titanium dioxid...

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Abstract

The invention discloses a preparation method of anatase titanium dioxide, and relates to the field of producing of materials. The preparation method of the anatase titanium dioxide comprises the following steps: mixing a preheated titanium oxide dichloride aqueous solution with a preheated base solution, cooling and separating after hydrolyzing, implementing salt treatment on the obtained anatasehydrated titanium dioxide, and calcining to obtain the anatase titanium dioxide; wherein the base solution is an aqueous solution containing soluble sulfate and soluble phosphate. The preparation method of the anatase titanium dioxide uses titanium oxide dichloride to generate a seed crystal and hydrolyze at the normal pressure, an anion coordination polyhedron is formed by controlling the contents of the sulfate radical and the phosphate radical in the base solution, the growing structure and the connecting mode of the hydrated titanium dioxide are changed, the anatase hydrated titanium dioxide is directly produced, the pure anatase titanium dioxide is obtained through calcining and dehydrating, the flow is simple, no induction period exists, the reaction time is short, the control is simple, and the industrial operation can be implemented.

Description

technical field [0001] This application relates to the field of material production, in particular, to a preparation method of anatase titanium dioxide. Background technique [0002] Titanium dioxide (TiO 2 ) is an important inorganic chemical product, which has important uses in industries such as coatings, inks, papermaking, plastics, rubber, chemical fibers, and ceramics. [0003] The common industrial production methods of titanium dioxide are sulfuric acid method and chlorination method. The sulfuric acid method is to use sulfuric acid to hydrolyze titanium-containing minerals to obtain a titanyl sulfate solution, which is purified and hydrolyzed to obtain hydrated titanium dioxide precipitates, and then fired in a brick kiln to produce titanium dioxide pigment products. There are many steps to discharge waste, crystal transformation requires many steps, and the incineration process used consumes a lot of energy. The chlorination method is to react ilmenite, high-tit...

Claims

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Application Information

Patent Timeline
21 Jun 2019
Publication
CN109911931A
IPC
C01G23/047; C01G23/053
Inventors
鲍领翔; 曹志成