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Preparation method of aluminium sol and application thereof

A technology of alumina sol and pseudo-boehmite powder, which is applied in chemical instruments and methods, catalyst activation/preparation, and compounds of Group 4/14 elements of the periodic table, etc., which can solve the problems of high production costs, high use requirements, and complex processes, etc. problems, to achieve the effect of reducing preparation cost, simplifying preparation process and remarkable application effect

Inactive Publication Date: 2007-05-16
天津市环科机动车尾气催化净化技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The process of the above-mentioned patented technology is relatively complicated, and the production cost and use requirements are relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Add 80 grams of pseudo-boehmite powder into 1000 ml of deionized water, and stir while adding. After the addition is complete, stir vigorously for about 30 minutes until it is completely dispersed. Then, slowly add 50 milliliters of nitric acid into the dispersion, and continue to stir at room temperature for 2-5 hours to form a stable aluminum sol.

[0015] In the aluminum sol prepared above, add the required catalyst; it can be added according to the conventional ratio, and the catalyst main agent contains three precious metals, platinum, palladium and rhodium.

[0016] The particle size is controlled at 1-20 microns, vigorously stirred for 2-5 hours to form a slurry, and directly coated on the metal honeycomb carrier or the ceramic honeycomb carrier. Then, after calcination at a high temperature of 500-800° C. for 3-5 hours, the catalyst is fixed on the surface of the carrier by the aluminum sol.

[0017] The above-mentioned carrier-loaded catalyst is washed with 10...

Embodiment 2

[0019] Add 100 grams of pseudo-boehmite powder into 1000 ml of deionized water, and stir while adding. After the addition is complete, stir vigorously for about 30 minutes until it is completely dispersed. Then, slowly add 80 milliliters of hydrochloric acid to the dispersion, and continue to stir at room temperature for 2-5 hours to form a stable aluminum sol.

[0020] In the aluminum sol prepared above, add the required catalyst; it can be added according to the conventional ratio, and the catalyst main agent contains three precious metals, platinum, palladium and rhodium. The particle size is controlled at 1-20 microns, vigorously stirred for 2-5 hours to form a slurry, and directly coated on the metal honeycomb carrier or the ceramic honeycomb carrier. Then, after calcination at a high temperature of 500-800° C. for 3-5 hours, the catalyst is fixed on the surface of the carrier by the aluminum sol.

[0021] The above-mentioned carrier-loaded catalyst is washed with 100 Hz...

Embodiment 3

[0023] Add 70 grams of pseudo-boehmite powder into 1000 ml of deionized water, and stir while adding. After the addition is complete, stir vigorously for about 30 minutes until it is completely dispersed. Then, slowly add 60 milliliters of nitric acid into the dispersion, and continue to stir at room temperature for 2-5 hours to form a stable aluminum sol.

[0024] In the aluminum sol prepared above, add the required catalyst; it can be added according to the conventional ratio, and the catalyst main agent contains three precious metals, platinum, palladium and rhodium. The particle size is controlled at 1-20 microns, vigorously stirred for 2-5 hours to form a slurry, and directly coated on the metal honeycomb carrier or the ceramic honeycomb carrier. Then, after calcination at a high temperature of 500-800° C. for 3-5 hours, the catalyst is fixed on the surface of the carrier by the aluminum sol.

[0025] The above-mentioned carrier-loaded catalyst is washed with 100 Hz ultr...

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Abstract

The invention relates to a method for preparing aluminum gel, which comprises: (1), using diaspore powder as material, via mol ratio of aluminum and water is 1:20-50, adding into deionized water, mixing, dispersing; (2), via mol ratio between hydrogen ion and aluminum ion is 1:1-20, adding inorganic acid, mixing, dissolving in normal temperature to form semi-transparent gel; (3), mixing for 2-5hours, to form stable product. When in application, adds needed catalyst into said aluminum gel to form slurry, to coat it on the metal beehive or ceramic beehive surface, baking at 500-800Deg. C for 3-5h, and fixing the catalyst on the carrier via aluminum gel; washing it with alcohol solution for 10min via ultrasonic wave at 100Hz, its carrier fall ratio is lower than 5%.

Description

technical field [0001] The invention relates to a preparation method of a high-temperature-resistant inorganic binder, in particular to a preparation method of an aluminum sol and its application, that is, a preparation process of the aluminum sol used for bonding a honeycomb carrier and a catalyst. Background technique [0002] At present, aluminum sol, as an inorganic binder, is widely used in the field of industrial catalysts and the field of motor vehicle environmental protection technology. [0003] There is a Chinese patent 93112576.6, patent name: a preparation method of monodisperse aluminum sol; a monodisperse aluminum sol is prepared under the condition of heating at 85-99°C and reflux aging for 8-80 hours. There is a Chinese patent 00110421.7, patent name: a preparation method of aluminum sol; stable and clear aluminum sol is prepared under the action of normal temperature and ultrasonic waves, one of the characteristics is that "the aluminum source is aluminum ni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J37/025B01J32/00C07F7/00
Inventor 豆立新程魁玉刘伯潭秦蓁卢珊潘春晖
Owner 天津市环科机动车尾气催化净化技术有限公司
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