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A kind of preparation method of low alkali metal catalyzed titanium dioxide

A production method and alkali metal technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problem of ineffective removal of alkali metals and the like

Active Publication Date: 2016-07-06
安徽迪诺环保新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the existing titanium dioxide production process cannot effectively remove alkali metals, so a method for preparing low-alkali metal catalyzed titanium dioxide is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1: After the salt treatment is completed and before calcination, the second-washed metatitanic acid is suction-filtered and beaten to 320g / l, after stirring, 1000ml is put into a clean beaker to continue stirring, and at the same time, an ammonia solution with a mass fraction of 20% is added 115ml and stirred evenly, and then the measured pH was 10.7, and the beaker was heated up in a constant temperature water bath at 85°, and stirred until the temperature of the mixed solution in the beaker reached 80° while heating up, and the measured pH was 10.4 after 1 hour of heat preservation, and the beaker was taken out and cooled to At 35°C, add 50ml of ethanol solution with a mass fraction of 75%, stir for 25min, then filter with suction, take the filter cake, dry it, grind it, and press it into tablets.

Embodiment 2

[0012] Example 2: After the salt treatment is completed and before calcination, the second-washed metatitanic acid is suction-filtered and beaten to 360g / l, after stirring, 1000ml is put into a clean beaker to continue stirring, and at the same time, an ammonia solution with a mass fraction of 20% is added 115ml and stir evenly, and then measure the pH to be 11, heat the beaker to a constant temperature water bath at 95°, stir while heating up until the temperature of the mixed solution in the beaker reaches 90°, and measure the pH to be 10.5 after holding for 1 hour, take out the beaker and cool to At 50°C, add 67ml of ethanol solution with a mass fraction of 75%, stir for 40min, then filter with suction, take the filter cake, dry it, grind it, and press it into tablets.

Embodiment 3

[0013] Example 3: After the salt treatment is completed and before the calcination, the second-washed metatitanic acid is suction-filtered and beaten to 380g / l, after being stirred well, 1000ml is put into a clean beaker to continue stirring, and at the same time, an ammonia solution with a mass fraction of 20% is added 115ml and stir evenly, and then measure the pH to be 10.8, heat the beaker to a constant temperature water bath at 90°, stir while heating up until the temperature of the mixed solution in the beaker reaches 85°, keep the temperature for 1h and measure the pH to be 11.7, take out the beaker and cool to At 40°C, add 100ml of ethanol solution with a mass fraction of 75%, stir for 30 minutes, then filter with suction, take the filter cake, dry it, grind it, and press it into tablets.

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Abstract

The invention discloses a production method of low-alkali metal catalytic titanium dioxide. The production method comprises the following steps: performing acidolysis, crystallization, concentration, hydrolysis, primary washing, bleaching, secondary washing, salt treatment, calcination and crushing sequentially, performing suction filtration and pulping on metatitanic acid which is qualified in secondary washing after salt treatment and before calcination to 320-380g / l, uniformly stirring, then taking 1000ml, placing into a clean beaker, continuously stirring, simultaneously adding 115ml of ammonia water solution with the mass fraction of 20%, uniformly stirring, heating the beaker in a constant-temperature water bath pot at the temperature of 85-95 DEG C, heating while stirring till the temperature of a mixed solution in the beaker achieves 80-90 DEG C, performing heat preservation for 1h, then taking out the beaker, cooling to 35-50 DEG C, adding an ethanol solution in the volume ratio to metatitanic acid of 1: (5-10) and the mass fraction of 75%, stirring for 25-60min, then performing suction filtration, taking a filter cake, drying, grinding and then tabletting. The production method disclosed by the invention has the beneficial effects that the product contains few alkali metals and has a small particle size, and crushing and grading are not required.

Description

technical field [0001] The invention relates to the technical field of denitrification catalytic titanium dioxide production, in particular to a method for preparing low-alkali metal catalytic titanium dioxide. Background technique [0002] TiO 2 As a new type of functional material, the catalyst used as a carrier has the advantages of high activity, good selectivity, strong anti-poisoning, good low-temperature activity, adjustable surface acidity, and high-temperature reducibility. It is not mature enough, but its huge application potential cannot be ignored. Many scholars believe that TiO 2 will become the successor to SiO 2 ,Al 2 o 3 Then the third generation catalyst carrier. The main raw material of titanium dioxide sold on the market is TiO 2 The production process of titanium dioxide by sulfuric acid method generally includes acidolysis, crystallization, concentration, hydrolysis, first washing, bleaching, second washing, salt treatment, calcination and crushing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053
CPCC01G23/08
Inventor 荚玉冬韩军军赵义凯
Owner 安徽迪诺环保新材料科技有限公司