Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing titanium dioxide product for high-specific surface area denitrating catalyst

A technology of denitration catalyst and high specific surface area, applied in the directions of titanium dioxide, catalyst carrier, chemical instruments and methods, etc., can solve the problems of inability to obtain high-performance titanium dioxide products, difficult environmental protection treatment, complicated treatment process, etc., and achieve high specific surface area of ​​products. , Improve the surface chemical activity, the effect of simple process

Inactive Publication Date: 2008-12-10
四川华铁钒钛科技股份有限公司
View PDF6 Cites 40 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Method 1 is to modify the metatitanic acid by adding ammonia water, which can improve the calcination performance of metatitanic acid and obtain a relatively loose calcined product. However, the treatment process of metatitanic acid is relatively complicated in this method, and a large amount of ammonia water is used. The manufacturing cost of the product is high, and the subsequent environmental protection treatment after using ammonia water is difficult, and the environmental protection pressure is also relatively high; method 2 does not modify the metatitanic acid, and controls a certain grain size by controlling the calcination temperature of the metatitanic acid Titanium dioxide products, high performance titanium dioxide products cannot be obtained

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 10Kg metatitanic acid (by TiO 2 Add a certain amount of deionized water to the reactor with a stirring device to adjust the concentration of the slurry to 10-20wt%; after stirring evenly, add 2.0wt% (relative to the weight of titanium dioxide) Tween 80 to the slurry , after fully stirring and filtering, the filter cake is dried at 120°C, and the dried filter cake is calcined at 200°C to 480°C for 5 hours, of which 200°C to 350°C for 2.5 hours, 350°C to 400°C for 1.0 hour, 400℃~480℃ for 1.5 hours, crush the calcined material to prepare a powdered titanium dioxide product. The X-ray diffraction method shows that the crystallite size of the anatase crystal (101) surface is 13nm; BET method The specific surface area of ​​titanium dioxide powder is 113m 2 / g.

Embodiment 2

[0025] Weigh 10Kg metatitanic acid (by TiO 2 ) into a reactor with a stirring device, add a certain amount of deionized water, and adjust the slurry concentration to 20-30wt%; after stirring evenly, add 0.8wt% (relative to the weight of titanium dioxide) OP emulsifier in the slurry , after fully stirring and filtering, the filter cake is dried at 120°C, and the dried filter cake is calcined at 200°C to 500°C for 5 hours, of which 200°C to 350°C for 2.5 hours, 350°C to 400°C for 1.0 hour, 400°C-500°C for 1.5 hours, crush the calcined material to prepare a powdered titanium dioxide product. The X-ray diffraction method shows that the crystallite size of the anatase crystal (101) surface is 14nm; BET method The specific surface area of ​​titanium dioxide powder is 102m 2 / g.

Embodiment 3

[0027] Weigh 10Kg metatitanic acid (by TiO 2 ) into a reactor with a stirring device, add a certain amount of deionized water, and adjust the slurry concentration to 18-20wt%; after stirring evenly, add 1.0wt% (relative to the weight of titanium dioxide) Tween 80 to the slurry , then add 3.0wt% water-soluble silicone oil JT-708, filter after thorough stirring, dry the filter cake at 120°C, and calcinate the dried filter cake at 200°C-480°C for 5 hours, of which °C for 2.5 hours, 350°C to 400°C for 1.0 hour, 400°C to 480°C for 1.5 hours, pulverize the calcined material to prepare a powdered titanium dioxide product, determined by X-ray diffraction method, anatase crystal (101) The crystallite particle size of the surface is 11nm; the specific surface area of ​​titanium dioxide powder measured by BET method is 121m 2 / g.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Crystallite sizeaaaaaaaaaa
Specific surface areaaaaaaaaaaa
Crystallite sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for preparing titania raw materials with high specific surface area used by denitration catalyst, which relates to the chemical product preparation technical field. The method comprises the following steps that: a metatitanic acid produced by adoption of the sulfuric acid method is processed by an organic surfactant and then modified so as to reduce the viscosity of the metatitanic acid; and loose titania products with high specific surface area and high surface chemical activity used by the denitration catalyst are prepared through filtration and calcination of the processed metatitanic acid. The method has a simple technique for processing the metatitanic acid and has low cost; and added organic substances are fully decomposed during the calcining stage, thereby impurities can not be brought into the final products and the environmental pollution can not be caused.

Description

technical field [0001] The invention relates to the technical field of chemical product preparation, in particular to a method for preparing a titanium dioxide product applied to a denitration catalyst and having a high specific surface area. Background technique [0002] Nitrogen oxides are one of the main air pollutants and important precursors for inducing photochemical smog and acid rain. Flue gas denitrification is another key area for the state to control pollutant emissions from thermal power plants after flue gas desulfurization. The denitrification catalyst is used to control the nitrogen oxides emitted by coal-fired and other thermal power plants to improve air quality and control acid rain pollution. The denitrification catalyst mainly uses ultra-fine-grained titanium dioxide as the active carrier, uses the oxides of vanadium and tungsten as the catalytic active components, and reduces the nitrogen oxides into nitrogen and water through ammonia. The specific surf...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C01G23/08B01J21/06B01J32/00B01J35/10B01D53/56
Inventor 李建彬鲁东胡新平
Owner 四川华铁钒钛科技股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com