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Preparation method for denitration catalyst carrier nano titanium dioxide

A nano-titanium dioxide and denitration catalyst technology, which is applied to catalyst carriers, titanium dioxide, chemical instruments and methods, etc., can solve the problems of cumbersome production process, increase production cost, affect single-pass yield, etc., achieve simple process, reduce equipment corrosion, Effects that are easy to implement

Inactive Publication Date: 2015-06-03
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process requires the concentration of metatitanic acid to be 7~9%, and the low concentration affects the yield per pass.
[0011] In summary, the above patents have prepared denitrification catalyst carrier nano-TiO by certain methods. 2 , but in the preparation process, some use concentrated sulfuric acid to dissolve metatitanic acid into titanyl sulfate and then precipitate it. The preparation process is long and the production process is cumbersome; some add a large amount of organic surfactant before and after the reaction, which increases the production cost. ; some use HNO 3 、H 2 SO 4 Such strong acid is highly corrosive to production equipment

Method used

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  • Preparation method for denitration catalyst carrier nano titanium dioxide
  • Preparation method for denitration catalyst carrier nano titanium dioxide
  • Preparation method for denitration catalyst carrier nano titanium dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Weigh 15g of metatitanic acid and add 66g of water to beat and disperse under stirring at room temperature, adjust the concentration of the slurry in terms of metatitanic acid to 123g / L, stir at room temperature for 0.5h, and mark it as A.

[0038]Weigh 0.08g of ammonium carbonate and add it to slurry A, stir in a water bath at 50oC for 2 hours, gradually add ammonia water dropwise to adjust the pH value of the slurry to 5, continue to add 0.08g of ammonium polyacrylate and stir for 2 hours; Cool completely, add appropriate amount of deionized water to wash, and finally filter with Buchner funnel, calcinate the filter cake at 100oC for 3h, then calcinate at 200oC for 3h, continue calcining at 300oC for 3h, and finally calcinate at 400oC for 3h, crush and grind to obtain denitrification Catalyst carrier nano titanium dioxide, marked as T-1.

[0039] Depend on figure 1 It can be seen that the titanium dioxide product synthesized by the present invention has uniform parti...

Embodiment 2

[0042] Weigh 20g of metatitanic acid and add 43g of water to beat and disperse under stirring at room temperature, adjust the concentration of the slurry in terms of metatitanic acid to 250g / L, stir at room temperature for 1h, and mark it as B.

[0043] Weigh 0.1g of ammonium carbonate and add it to slurry B, stir in a water bath at 60oC for 1.5h, gradually add ammonia water dropwise to adjust the pH value of the slurry to 5, continue to add 0.10g of ammonium citrate and stir for 2h; Cool completely, add appropriate amount of deionized water to wash, finally filter with Buchner funnel, calcinate the filter cake at 150oC for 3h, then calcinate at 250oC for 3h, continue calcining at 350oC for 3h, and finally calcinate at 450oC for 3h, crush and grind to obtain denitrification Catalyst carrier nano titanium dioxide, marked as T-2.

Embodiment 3

[0045] Weigh 20g of metatitanic acid and add 54g of water to beat and disperse under normal temperature stirring conditions, adjust the concentration of the slurry in terms of metatitanic acid to 200g / L, stir at room temperature for 1h, and mark it as C.

[0046] Weigh 0.07g of ammonium citrate and add it to slurry C, stir in a water bath at 60oC for 0.5h, gradually add ammonia water dropwise to adjust the pH value of the slurry to 7, continue to add 0.03g of ammonium carbonate and stir for 2.5h; Cool the slurry completely, add an appropriate amount of deionized water to wash, and finally filter it with a Buchner funnel, calcinate the filter cake at 150oC for 3h, then calcinate at 250oC for 3h, continue calcining at 350oC for 3h, and finally calcinate at 500oC for 2h, and then grind and grind to obtain The denitrification catalyst supports nano-titanium dioxide, marked as T-3.

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Abstract

The invention discloses a preparation method for a denitration catalyst carrier nano titanium dioxide. According to the method, an intermediate metatitanic acid for preparing titanium dioxide with a sulfuric acid method is used as a raw material; an ammonium salt is added to adjust the pH value; and the steps of washing, filtering, drying and roasting are carried out to obtain the denitration catalyst carrier nano titanium dioxide product. Compared with the prior art, the method disclosed by the invention has low manufacturing cost and a simple process; and the prepared product has the advantages of large specific surface area, high dispersion degree, uniform particle morphology, narrow grain diameter distribution, small grain diameters of aggregates and the like.

Description

technical field [0001] The invention relates to a preparation method of nano-titanium dioxide supported by a denitration catalyst. Background technique [0002] With the development of modern industry and the increasing number of automobiles, human beings emit NO into the atmosphere x More and more, mainly NO and NO 2 Exists in the form of NO, where NO accounts for about NO x 95% of the total. NO x Pollution has become an increasingly serious global problem, which is very harmful to human health and leads to the greenhouse effect, ozone layer destruction, photochemical smog and acid rain. [0003] my country is the largest coal producing and consuming country in the world, and it is also one of the few countries in the world where coal is the main energy source. The consumption of coal resources continues to increase, and NO in the atmosphere x At the same time, the rapid development of my country's motor vehicle industry in recent years has also brought about increasin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J32/00C01G23/053B01D53/86B01D53/56
Inventor 唐志诚张朋韩维亮潘霞
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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