Recycling method of liquid zirconium sulfate hydrolysate for coating rutile titanium dioxide

A rutile type titanium dioxide and hydrolyzate technology, which is applied in zirconium sulfate, chemical instruments and methods, energy and wastewater treatment, etc., can solve the problems of large water consumption for washing and sodium removal, long treatment process, and high recycling cost, and achieves reduction of Emissions, shortening of process flow, and the effect of improving yield

Pending Publication Date: 2022-07-12
重庆思必水处理材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are following deficiencies in the prior art: 1, the treatment process flow is long
Basically, the production process of zirconium sulfate is prepared according to the zirconium raw material, and the operation is cumbersome; 2. The cost of recycling is high
The main reason is that the melting reaction needs to be carried out during the preparation process, the energy consumption is high, and the water consumption of washing and removing sodium is large, etc.

Method used

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  • Recycling method of liquid zirconium sulfate hydrolysate for coating rutile titanium dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take 100g of sulfuric acid mother liquor and pour it into a 500ml burner, stir and pour into 100g of zirconium slag hydrolyzed with rutile titanium dioxide coated with zirconium sulfate (broken into powdery particles with a particle size of 80 meshes), and mix at a stirring condition of 200 rpm. For 30min, slowly pour 80g 98% concentrated sulfuric acid into the burner, continue to stir, the temperature rises, control the temperature of the system to continue the reaction at 105±3℃ for 65min, the zirconium sulfate crystals are continuously precipitated in the middle, and start when there are zirconium sulfate crystals. Gradually lower the temperature to 40°C, pour it into a Φ100mm Buchner funnel for suction filtration, and use the filtrate to wash the burnt and prepare it for later use. Then add 300 g of tap water to the burner, add the filter cake just filtered under stirring at 63 rpm, and add 30 g of sulfuric acid mother liquor or filtrate, and continue stirring for 10...

Embodiment 2

[0024] Take 100g of sulfuric acid mother liquor and pour it into a 500ml burner, stir and pour in 100g of zirconium slag hydrolyzed with zirconium sulfate coated with rutile titanium dioxide (crushed into powdery particles with a particle size of 80 meshes) and 0.05g of conversion accelerator A, at 200 rpm Mixing for 30min under stirring conditions per minute, then slowly pour 80g 98% concentrated sulfuric acid into the burner, continue stirring, the temperature rises, control the temperature of the system to continue the reaction at 105±3°C for 65min, and zirconium sulfate crystals are continuously precipitated in the middle. When zirconium sulfate crystals are precipitated, the temperature is gradually lowered to 40°C, and all are poured into a Φ100mm Buchner funnel for suction filtration. Then add 300 g of tap water to the burner, add the filter cake just filtered under stirring at 63 rpm, and add 30 g of sulfuric acid mother liquor or filtrate, and continue stirring for 10 ...

Embodiment 3

[0026] Take 100g of sulfuric acid mother liquor and pour it into a 500ml burner, stir and pour 100g of zirconium slag hydrolyzed with rutile titanium dioxide coated with zirconium sulfate (crushed into powdery particles with a particle size of 80 meshes) and 0.05g of conversion accelerator B, at 200 rpm Mixing for 30min under stirring conditions per minute, then slowly pour 80g 98% concentrated sulfuric acid into the burner, continue stirring, the temperature rises, and the temperature of the control system is kept at 105±3°C for 65min, and zirconium sulfate crystals are continuously precipitated in the middle. When zirconium sulfate crystals are precipitated, the temperature is gradually lowered to 40°C, and all are poured into a Φ100mm Buchner funnel for suction filtration. Then add 300 g of tap water to the burner, add the filter cake just filtered under stirring at 63 rpm, and add 30 g of sulfuric acid mother liquor or filtrate, and continue stirring for 10 min to obtain a ...

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Abstract

The embodiment of the invention discloses a recycling method of liquid zirconium sulfate hydrolysate for coating rutile type titanium dioxide, and particularly relates to the field of coating of rutile type titanium dioxide, which comprises the following steps: step 1, zirconium slag comes from hydrolysate in a storage tank of zirconium sulfate solution for coating rutile type titanium dioxide, adding a proper amount of conversion accelerant according to the amount of the zirconium slag, and then performing crushing treatment; 2, adding zirconium slag and sulfuric acid mother liquor into the beaker, and stirring and mixing; 3, slowly pouring sulfuric acid with the concentration of 98% into the boiler, stirring, and controlling the reaction temperature and the reaction time; according to the method, external heating is not needed when the zirconium sulfate solution is prepared from the zirconium slag, the recycling rate of the zirconium slag reaches 99% or above, the problem of recycling of zirconium sulfate hydrolysate for rutile titanium dioxide coating is solved, discarding of waste in the storage stage of zirconium sulfate is reduced, the technological process for converting the zirconium slag into zirconium sulfate is shortened, and the production cost is reduced. And the reaction rate of the zirconium slag in the sulfuric acid solution is improved.

Description

technical field [0001] The embodiment of the present invention relates to the field of coating of rutile titanium dioxide, in particular to a method for recycling liquid zirconium sulfate hydrolyzate for coating of rutile titanium dioxide. Background technique [0002] Some special-purpose rutile titanium dioxide needs surface treatment (commonly known as: coating) during the production process. Liquid zirconium sulfate needs to be used in the coating process of rutile titanium dioxide to improve the weather resistance of rutile titanium dioxide, etc. Performance, coating mechanism is that when zirconium sulfate solution and soluble hydroxide are added, white colloidal precipitate ZrO will be precipitated 2 .nH 2 O, the water content of which can be changed, when dehydration is obtained, ZrO 2 It has a very high melting point, has special resistance to acids and alkalis, and has good mechanical properties. However and The zirconium sulfate solution is very easy to hydrol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/36C09C3/06C01G25/06
CPCC09C1/3653C09C3/06C01G25/06Y02W10/37
Inventor 郭福平杨鹏宇杨彪
Owner 重庆思必水处理材料有限公司
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