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Silicon oxide-aluminium oxide having pseudo thin allophane structure and its preparation method

A pseudo-boehmite and silica technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of low content of four-coordinated aluminum, and achieve high N value and high N value. The effect of catalytic cracking activity

Inactive Publication Date: 2006-08-02
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] The purpose of the present invention is to provide a new pseudo-boehmite with a relatively high content of four-coordinated aluminum, aiming at the shortcoming of low content of four-coordinated aluminum in the existing silica-alumina with pseudo-boehmite structure. Silica-alumina with bauxite structure and preparation method thereof

Method used

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  • Silicon oxide-aluminium oxide having pseudo thin allophane structure and its preparation method

Examples

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Effect test

example 1

[0033] Take by weighing 515 grams of aluminum trichloride (Beijing Chemical Reagent Factory product), dissolve into 1.6 liters of aluminum trichloride solution a1(Al 2 o 3 Concentration is 65 grams / liter); 500 milliliters of concentrated ammonia water (product of Beijing Yili Fine Chemicals Co., Ltd., concentration is 25%-28%) is diluted with deionized water into 1500 milliliters of solution b1; Get the modulus of industrial grade as 3.26, SiO 2Content is 220 milliliters of water glass solutions (Changling refinery product) of 280 grams per liter, is diluted with deionized water into 1000 milliliters of solution c1; Get 75 grams of sodium hydroxide, is dissolved into 150 milliliters of solutions d1 with deionized water.

[0034] Add 1.7 liters of deionized water into a 2-liter reaction tank, stir and heat to 40 ° C, and flow into solutions a1 and b1, adjust the flow rate so that the pH of the reaction system is 7, and the reaction product enters the aging tank for aging. Con...

example 2

[0040] Take by weighing 800 grams of aluminum nitrate (product of Beijing Chemical Reagent Factory), dissolve into 1.6 liters of aluminum nitrate solution a2(Al 2 o 3 Concentration is 65 grams per liter); 500 milliliters of concentrated ammonia water (product of Beijing Yili Fine Chemical Co., Ltd., concentration is 25%-28%) is diluted with deionized water into 1500 milliliters of solution b2; Get the modulus of industrial grade as 3.26, SiO 2 Content is 280 grams per liter of water glass solution (Changling Oil Refinery product) 60 milliliters, is diluted into 240 milliliters of solutions c2 with deionized water; Get 75 grams of sodium hydroxide, be dissolved into 150 milliliters of solutions d2 with deionized water.

[0041] Add 1.7 liters of deionized water into a 2-liter reaction tank, stir and heat to 50 ° C, and flow into solutions a2 and b2, adjust the flow rate so that the pH of the reaction system is 8, and the reaction product enters the aging tank for aging. The c...

example 3

[0043] Take by weighing 800 grams of aluminum nitrate (product of Beijing Chemical Reagent Factory), dissolve into 1.6 liters of aluminum nitrate solution a3(Al 2 o 3 Concentration is 65 grams per liter); 500 milliliters of concentrated ammonia water (product of Beijing Yili Fine Chemical Co., Ltd., concentration is 25%-28%) is diluted with deionized water into 1500 milliliters of solution b3; Get the modulus of industrial grade as 3.26, SiO 2 Content 280 grams per liter of water glass solution (Changling Refinery product) 160 milliliters, be diluted into 500 milliliters of solutions c3 with deionized water; Get 35 grams of sodium hydroxide, be dissolved into 150 milliliters of solutions d3 with deionized water.

[0044] Add 1.7 liters of deionized water into a 2-liter reaction tank, stir and heat to 40 ° C, and flow into solutions a3 and b3, adjust the flow rate so that the pH of the reaction system is 8, and the reaction product enters the aging tank for aging. The conditi...

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Abstract

A catalyst carrier with pseudo-boehmite structure is prepared from silicon oxide and aluminium oxide through calcining. It has higher catalytic cracking activity and high N value (0.2-1).

Description

technical field [0001] The invention relates to a silica-alumina and a preparation method thereof, more specifically to a silica-alumina with a pseudo-boehmite structure and a preparation method thereof. Background technique [0002] Compared with molecular sieves, silica-alumina with divergent pore distribution has high specific surface area, good sintering resistance and certain acid catalytic activity after activation. It is often used as a carrier and active component to prepare various types of catalysts. In the existing methods, silica-alumina is often prepared by co-gelling or step-by-step gelation of alkali metal silicate and aluminum-containing salt. The silica-alumina prepared by these methods are mostly amorphous silica-alumina. For amorphous silica-alumina, there are generally problems of poor product quality stability and molding operability. For example, in practical applications, silica-alumina is usually made into a carrier by usin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/08B01J21/04
Inventor 曾双亲李大东杨清河聂红石亚华舒兴田
Owner CHINA PETROLEUM & CHEM CORP
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