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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 production process of nano-titanium dioxide / diatomite composite photocatalytic material solves the problems that the photocatalytic material in the prior art cannot completely remove harmful substances, and the effect of advanced treatment of exhaust gas is not ideal, and reduces the cost and improves the photocatalytic performance.

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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Effect test

Embodiment 1

[0025] Purifying refined diatomite from raw ore comprises the following steps:

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

[0027] Wet acid leaching: Put 1680kg of sulfuric acid with a concentration of 72%, and 420kg of the above-mentioned sorted diatomaceous earth into the reaction kettle, carry out wet chemical purification with sulfuric acid, further remove the acid-soluble impurities in the diatom shell, and dredge the diatoms. When the temperature of the reaction kettle reaches 100°C, keep warm for 4 hours; after keep warm for 4 hours, inject 1600L of clean water, and keep warm for 1 hour;

[0028] Filtration and washing: inject the purified solution in the above reaction kettle into ...

Embodiment 2

[0042] In the described pulping step, the concentration is 36% hydrochloric acid solution: water = 308.2: 30: 6000 in parts by weight;

[0043] In the described hydrolysis precipitation step, be the titanium tetrachloride of 200g / L by weight part concentration: concentration is the ammonium sulfate of 200g / L: the ratio of the ammonium carbonate=339:308.2:308.2 that concentration is 200g / L carries out hydrolysis precipitation reaction;

[0044] In the step of filtering and washing, filter and wash in the ratio of parts by weight 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] Other steps are the same as in Example 1.

Embodiment 3

[0049] In the pulping step, after mixing in the ratio of refined diatomite in parts by weight: hydrochloric acid solution with a concentration of 36%: water = 260: 12: 5000, stir for 7 minutes;

[0050] In the described hydrolysis precipitation step, be the titanium tetrachloride of 200g / L by weight part concentration: the ammonium sulfate that concentration is 200g / L: the ratio of the ammonium carbonate=280:240:240 that concentration is 200g / L carries out hydrolysis precipitation reaction;

[0051] In the described filtering and washing step, filtering and washing is carried out in a ratio of parts by weight 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] 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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