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Preparation method for titanium dioxide serving as catalyst carrier

A catalyst carrier, titanium dioxide technology, applied in the directions of catalyst carrier, titanium dioxide, chemical instruments and methods, etc., can solve the problem of not being able to obtain high-performance titanium dioxide products, and achieve the effects of high product specific surface area, good product performance and low cost.

Inactive Publication Date: 2012-07-18
四川华铁钒钛科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method does not modify the metatitanic acid, and by controlling the calcination temperature of the metatitanic acid, the titanium dioxide product with a certain grain size cannot be obtained, and high-performance titanium dioxide products cannot be obtained.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation of ammonia water: liquid ammonia is decompressed into ammonia gas, and the ammonia gas is passed into pure water to prepare concentrated ammonia water for later use.

[0029] Weigh 10Kg metatitanic acid (according to TiO 2 meter), add it into the reactor with a stirring device, add a certain amount of deionized water, and adjust the concentration of the slurry to 12-24wt%; after stirring evenly, add ammonia water to the slurry to adjust the pH value to 8.5; after fully stirring, filter, filter The obtained filter material is massive metatitanic acid; the mass fraction of titanium dioxide in the massive filter cake is 40%-55%. The filter cake obtained by mechanically crushing massive metatitanic acid was dried at 200°C to 360°C for 2.7 hours, and the dried filter cake was calcined at 360°C to 410°C for 0.8 hours and at 410°C to 560°C for 2.5 hours. The obtained calcined kiln material is pulverized by a shear pulverizer to prepare a powdered titanium dioxide ...

Embodiment 2

[0033] Preparation of ammonia water: liquid ammonia is decompressed into ammonia gas, and the ammonia gas is passed into pure water to prepare concentrated ammonia water for later use.

[0034] Weigh 10Kg metatitanic acid (according to TiO 2meter), add it to the reactor with a stirring device, add a certain amount of deionized water, and adjust the concentration of the slurry to 15-20wt%; after stirring evenly, add ammonia water to the slurry to adjust the pH value to 8.0; after fully stirring, filter, The filter material obtained by filtering is massive metatitanic acid; the mass fraction of titanium dioxide in the massive filter cake is 40%-50%. The filter cake obtained by mechanically crushing massive metatitanic acid was dried at 200°C to 360°C for 2.7 hours, and the dried filter cake was calcined at 360°C to 410°C for 0.8 hours and at 410°C to 540°C for 2.5 hours. The obtained calcined kiln material is pulverized by a shear pulverizer to prepare a powdered titanium dioxi...

Embodiment 3

[0037] Preparation of ammonia water: liquid ammonia is decompressed into ammonia gas, and the ammonia gas is passed into pure water to prepare concentrated ammonia water for later use.

[0038] Weigh 10Kg metatitanic acid (according to TiO 2 meter), add it to the reactor with a stirring device, add a certain amount of deionized water, and adjust the slurry concentration to 20-24wt%; after stirring evenly, add ammonia water to the slurry to adjust the pH value to 8.8; after fully stirring, filter, The filter material obtained by filtering is massive metatitanic acid; the mass fraction of titanium dioxide in the massive filter cake is 42%-48%. The filter cake obtained by mechanically crushing massive metatitanic acid was dried at 200°C to 360°C for 2.7 hours, and the dried filter cake was calcined at 360°C to 410°C for 0.8 hours and at 410°C to 530°C for 2.5 hours. The obtained calcined kiln material is pulverized by a shear pulverizer to prepare a powdered titanium dioxide pro...

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Abstract

The invention discloses a preparation method for titanium dioxide serving as a catalyst carrier. The preparation method comprises the following steps of: dispersing metatitanic acid serving as a raw material by pulping, and adjusting until the concentration of the slurry is 12 to 26 mass percent based on titanium dioxide (TiO2); adding ammonia water into the slurry, and adjusting the pH value to be between 6.0 and 9.0; filtering and dehydrating to obtain a blocky filter cake; mechanically crushing the blocky filter cake; drying and calcining the crushed filter cake at 200 to 560 DEG C for 6 hours; and grinding the calcined material in a kiln to obtain a titanium dioxide product which serves as a denitration catalyst carrier. By the preparation method, the manufacturing cost is low, the process is simple, the prepared product has the advantages of large specific area, high surface chemical activity and high processability, and the prepared final product is high in catalytic efficiency.

Description

technical field [0001] The invention relates to the technical field of chemical product preparation, in particular to a preparation method of sulfated titanium dioxide used as a catalyst carrier. Background technique [0002] High-temperature combustion exhaust gas - flue gas contains a large amount of NOx (nitrogen oxides), which is one of the main air pollutants. Nitrogen oxides, mainly nitrogen monoxide and nitrogen dioxide, are an important cause of photochemical smog and acid rain. At the same time, nitrogen oxides are also an important greenhouse gas. The impact of the greenhouse effect on the same amount is several times that of carbon dioxide. Ten times to hundreds of times. Therefore, the denitrification treatment of flue gas is a very important and urgent task for environmental protection. SCR (Selective Catalytic Reduction) flue gas denitrification technology is currently the most effective technology commonly used in the world to solve atmospheric nitrogen oxid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053C01G23/08B01J32/00B01J21/06
Inventor 王兰武李振兴章强
Owner 四川华铁钒钛科技股份有限公司
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