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Production method of titanyl sulfate and nano titanium dioxide

A technology of titanium oxysulfate and production method, applied in the directions of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problems of long crystallization time, low product quality, high titanium concentration requirements, and achieve high production efficiency, Low wastewater discharge and good product quality

Pending Publication Date: 2022-02-01
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention is mainly to provide a production method of titanium oxysulfate and nano-titanium dioxide, aiming to solve the technical problems of long crystallization time, high concentration requirement of raw material liquid titanium and low product quality existing in the production technology of titanium dioxide by sulfuric acid method

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  • Production method of titanyl sulfate and nano titanium dioxide
  • Production method of titanyl sulfate and nano titanium dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of production method of titanyl sulfate and nano-titanium dioxide comprises the following steps:

[0021] (1) Add sulfuric acid to the sulfuric acid leaching solution of ilmenite or other titanium-containing materials such as metatitanic acid, so that the sulfuric acid concentration of the feed solution is 8mol / L, and the titanium dioxide concentration of the feed solution is 100g / L.

[0022] (2) Heat the feed liquid to 120° C., add pure and uniform titanyl sulfate seed crystals, the amount of seed crystals added is 5% of the mass of titanium dioxide contained in the feed liquid, and keep warm for 150 minutes to precipitate crystallization.

[0023] (3) After the crystallization is completed, cool to room temperature, separate the crystallization mother liquor, and obtain titanyl sulfate crystals, and the crystallization rate reaches more than 90%.

[0024] (4) Wash the obtained crystals with anhydrous or low-moisture ethanol / methanol to remove free water entrain...

Embodiment 2

[0027] A kind of production method of titanyl sulfate and nano-titanium dioxide comprises the following steps:

[0028] (1) Add sulfuric acid to the sulfuric acid leaching solution of ilmenite or other titanium-containing materials such as metatitanic acid, so that the sulfuric acid concentration of the feed solution is 7mol / L, and the titanium dioxide concentration of the feed solution is 140g / L.

[0029] (2) Heat the feed liquid to 100° C., add pure and uniform titanyl sulfate seed crystals, the amount of seed crystals added is 2% of the mass of titanium dioxide contained in the feed liquid, and keep warm and crystallize for 120 minutes.

[0030] (3) After the crystallization is completed, it is cooled to room temperature, and the crystallization mother liquor is separated to obtain titanyl sulfate crystals, and the crystallization rate reaches 93%.

[0031] (4) The obtained crystals are washed with anhydrous or low-water ethanol / methanol to remove free water entrained by th...

Embodiment 3

[0034] A kind of production method of titanyl sulfate and nano-titanium dioxide comprises the following steps:

[0035] (1) Add sulfuric acid to the sulfuric acid leaching solution of ilmenite or other titanium-containing materials such as metatitanic acid, so that the sulfuric acid concentration of the feed solution is 6mol / L, and the titanium dioxide concentration of the feed solution is 180g / L.

[0036] (2) Heat the feed liquid to 100° C., add pure and uniform titanyl sulfate seed crystals, the amount of seed crystals added is 1% of the mass of titanium dioxide contained in the feed liquid, and keep warm for 90 minutes for crystallization.

[0037] (3) After the crystallization is completed, it is cooled to room temperature, and the crystallization mother liquor is separated to obtain titanyl sulfate crystals with a crystallization rate of 93.5%.

[0038] (4) The obtained crystals are washed with anhydrous or low-water ethanol / methanol to remove free water entrained by the ...

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Abstract

The invention provides a production method of titanyl sulfate and nano titanium dioxide, which comprises the following steps: by taking ilmenite, metatitanic acid or sulfuric acid leachate of other titanium-containing materials as a raw material, adding a certain amount of concentrated sulfuric acid into the feed liquid, heating to supersaturate titanium, separating out titanyl sulfate crystals, and separating out crystallization mother liquor to obtain a commodity titanyl sulfate; and calcining titanyl sulfate to obtain an anatase type or rutile type nano titanium dioxide product, and carrying out post-treatment to obtain the commodity nano titanium dioxide. According to the technology, equipment of a traditional sulfuric acid method titanium dioxide production process can be completely utilized, additional equipment investment is not needed, and compared with an existing sulfuric acid method titanium dioxide production process, the technology has the advantages of being better in product quality, higher in crystallization speed, wide in feed liquid application range and the like.

Description

technical field [0001] The invention belongs to the field of metallurgy and chemical industry, and in particular relates to a production method of titanyl sulfate and nanometer titanium dioxide. Background technique [0002] Titanium oxysulfate is a white loose white powder, the microstructure is long strip, usually contains two crystal water, the molecular formula is: TiOSO 4 2H 2 O. Titanyl sulfate is widely used, it can be used as a mordant, reducing agent, water treatment agent, etc. for fabrics, and can also be dissolved and added with a precipitating agent such as urea to make the precipitated nano-titanium dioxide adhere to the fabric, activated carbon and molecular sieve. It has the ability of anti-ultraviolet radiation and high catalytic activity. Direct calcination of titanyl sulfate can be decomposed to obtain titanium dioxide and sulfur dioxide / sulfur trioxide. [0003] Titanium dioxide is a white powder, molecular formula: TiO 2 , is the main component of t...

Claims

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Application Information

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IPC IPC(8): C01G23/00C01G23/047C01G23/08B82Y30/00B82Y40/00
CPCC01G23/008C01G23/08C01G23/047B82Y30/00B82Y40/00C01P2004/64C01P2002/30
Inventor 李青刚李欢张贵清曾理曹佐英关文娟巫圣喜
Owner CENT SOUTH UNIV
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