Process for producing nano titanium dioxide/diatomite composite photocatalytic material

A technology of nano-titanium dioxide and composite photocatalysis, which is applied in the direction of physical/chemical process catalysts, chemical/physical processes, catalyst activation/preparation, etc., can solve the problems of unsatisfactory advanced treatment of exhaust gas and the inability to completely remove harmful substances, etc., and achieve improvement Photocatalytic performance, ideal effect, and the effect of simplifying the preparation process

Active Publication Date: 2010-08-18
临江市宝健纳米复合材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problems existing in the above-mentioned traditional technology, through hard exploration and research, using natural diatomite as raw material, after purifying and dredging pores, using titanium tetrachloride as titanium source, and adopting hydrolysis precipitation method, a kind of The p

Method used

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  • Process for producing nano titanium dioxide/diatomite composite photocatalytic material
  • Process for producing nano titanium dioxide/diatomite composite photocatalytic material
  • Process for producing nano titanium dioxide/diatomite composite photocatalytic material

Examples

Experimental program
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Example Embodiment

[0024] Example 1

[0025] Purification of refined diatomaceous earth from raw ore includes the following steps:

[0026] Dry the diatomite ore to a moisture content of 0-2%, and use an airflow turbine separator to sort and remove sand to remove grit and impurities with a particle size> 43μm, and then calcinate with a rotary kiln to remove organic matter. The calcining temperature is 500 ℃, heat preservation calcination time 90min

[0027] Wet acid leaching: Put 1680kg of sulfuric acid with a concentration of 72% and 420kg of diatomaceous earth after the above sorting into the reactor, and use sulfuric acid for wet chemical purification to further remove the acid-soluble impurities in the diatom shell and dredge the diatom The pores of the body increase the specific surface area of ​​the diatomaceous earth. When the temperature of the reactor reaches 100°C, the reaction is kept for 4 hours; after the reaction is kept for 4 hours, 1600L of water is injected, and the reaction is kept f...

Example Embodiment

[0041] Example 2

[0042] In the pulping step, mixing in parts by weight refined diatomaceous earth: a 36% concentration of hydrochloric acid solution: water = 308.2:30:6000;

[0043] In the hydrolysis and precipitation step, the hydrolysis is carried out at the ratio of weight parts of titanium tetrachloride with a concentration of 200g / L: ammonium sulfate with a concentration of 200g / L: ammonium carbonate with a concentration of 200g / L=339:308.2:308.2 Precipitation reaction

[0044] In the filtering and washing step, filtering and washing are performed in a ratio of parts by weight of refined diatomaceous earth: water = 308.2:13000;

[0045] In the drying step, the drying temperature is 300°C, and the drying is stopped when the water content reaches 0-6%;

[0046] In the calcination step, the calcination time is 6 hours, and the calcination temperature is 620°C;

[0047] The other steps are the same as in Example 1.

Example Embodiment

[0048] Example 3

[0049] In the said pulping step, after mixing in parts by weight refined diatomaceous earth: 36% hydrochloric acid solution: water = 260:12:5000, stirring for 7 minutes;

[0050] In the hydrolysis and precipitation step, the hydrolysis is carried out at the ratio of weight parts of titanium tetrachloride with a concentration of 200g / L: ammonium sulfate with a concentration of 200g / L: ammonium carbonate with a concentration of 200g / L=280:240:240 Precipitation reaction

[0051] In the filtering and washing step, filtering and washing are performed according to the ratio of parts by weight of refined diatomaceous earth: water = 260:10000;

[0052] In the drying step, the drying temperature is 280°C;

[0053] In the calcination step, the calcination time is 3 hours, and the calcination temperature is 700°C;

[0054] The other steps are the same as in Example 1.

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Abstract

The invention relates to a process for producing a nano titanium dioxide/diatomite composite photocatalytic material. The process comprises the following steps: purifying a diatomite raw material by using grading and acid-washing processes; synthesizing nano titanium dioxide/diatomite composite particles by adopting a hydrolysis-precipitation method through the purified diatomite serving as a carrier, titanium tetrachloride serving as a precursor and hydrochloric acid, ammonium sulfate and ammonium carbonate serving as aids; and filtering, washing, drying and burning the composite particles to form a finished product. The process can thoroughly remove harmful substances, has quite ideal effect on deep treatment of waste gas, lowers the cost and improves the photocatalytic performance.

Description

technical field [0001] The invention relates to a production process of a photocatalytic material, in particular to a production process of a nano titanium dioxide / diatomite composite photocatalytic material. Background technique [0002] Environmental protection and ecological construction is one of the major challenges facing mankind in the 21st century, which is directly related to human survival and sustainable economic and social development. With the enhancement of human environmental protection awareness and the improvement of global environmental protection standards, the environmental protection industry will become an important emerging industry in the new century. [0003] Diatomaceous earth is a light, porous (pore size distribution of several nm to hundreds of nm), natural mineral whose main component is amorphous silica, has a high specific surface area and can absorb various organic and inorganic pollutants. It has the advantages of easy access to raw materia...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J37/03B01J37/08B01J20/14A62D3/10A62D101/28
Inventor 王秀宝
Owner 临江市宝健纳米复合材料科技有限公司
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