Preparation method of high-gum-solubility pseudoboehmite

A technique of pseudo-boehmite and high glue is applied in the field of preparation of pseudo-boehmite with high peptization, can solve the problems of low crystal phase purity, non-uniform pore size, low peptization performance, etc., and achieves low preparation cost , the effect of high preparation efficiency and simplified preparation process

Active Publication Date: 2017-05-10
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the domestic production methods of pseudo-boehmite are mainly carbonization and precipitation methods. The products pr

Method used

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  • Preparation method of high-gum-solubility pseudoboehmite

Examples

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Example Embodiment

[0018] Example 1:

[0019] Put 10 grams of metallic aluminum, 0.02 grams of n-hexanol aluminum and 63 grams of n-hexanol into a four-necked flask, heat to 120°C to start the reaction, and slowly drop 126 grams of n-hexanol into the flask when a large number of bubbles are generated in the flask. After the reaction, 102 g of n-hexanol was added to the flask, the temperature was raised to 120° C., and aluminum tri-n-hexanoxide was obtained by filtration. Add 30 mL of deionized water to the flask, raise the temperature to 85° C., add dropwise aluminum tri-n-hexanoxide solution at 85° C. into the flask while stirring, and complete the dripping in 30 minutes. The n-hexanol produced by the hydrolysis of aluminum alkoxide is drawn out from the flask. Add 270 mL of deionized water to the flask and raise the temperature to 85° C. After aging for 6 hours, spray drying to obtain highly peptized pseudo-boehmite.

Example Embodiment

[0020] Example 2:

[0021] Put 10 grams of metallic aluminum, 0.02 grams of n-hexanol and 63 grams of n-hexanol into a four-necked flask, and heat to 130°C to start the reaction. When a large number of bubbles are generated in the flask, 126 grams of n-hexanol is slowly dropped into the flask. After the reaction, 102 grams of n-hexanol was added to the flask, the temperature was raised to 120° C., and aluminum tri-n-hexanoxide was obtained by filtration. Add 30 mL of deionized water to the flask, raise the temperature to 85° C., add dropwise aluminum tri-n-hexanoxide solution at 85° C. into the flask while stirring, and complete the dripping in 30 minutes. The n-hexanol produced by the hydrolysis of aluminum alkoxide is drawn out from the flask. 400mL of deionized water was added to the flask and the temperature was raised to 85°C. After aging for 8 hours, spray-dried to obtain highly peptized pseudo-boehmite.

Example Embodiment

[0022] Example 3:

[0023] Put 10 grams of metallic aluminum, 0.02 grams of n-hexanol aluminum and 63 grams of n-hexanol into a four-necked flask, heat it to 140°C to start the reaction, and slowly drop 126 grams of n-hexanol into the flask when a large number of bubbles are generated in the flask. After the reaction, 102 grams of n-hexanol was added to the flask, the temperature was raised to 120° C., and aluminum tri-n-hexanoxide was obtained by filtration. Add 30 mL of deionized water to the flask, raise the temperature to 85° C., add dropwise aluminum tri-n-hexanoxide solution at 85° C. into the flask while stirring, and complete the dripping in 30 minutes. The n-hexanol produced by the hydrolysis of aluminum alkoxide is drawn out from the flask. 600mL of deionized water was added to the flask and the temperature was raised to 85°C. After aging for 12 hours, spray-dried to obtain highly peptized pseudo-boehmite.

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Abstract

The invention provides a preparation method of high-gum-solubility pseudoboehmite for a catalyst. The preparation method comprises the following preparation steps: (1) preparing aluminum alkoxide; (2) filtering; (3) hydrolyzing the aluminum alkoxide; (4) aging, and distilling out alcohol; and (5) performing spray drying to obtain the pseudoboehmite. The pseudoboehmite product prepared by the invention has the advantages of favorable gum solubility, centralized pore distribution, single crystal phase and the like; and the obtained product can be widely used for catalyst carriers.

Description

technical field [0001] The invention belongs to the field of catalyst materials, in particular to a preparation method of highly peptized pseudo-boehmite. Background technique [0002] Pseudo-boehmite, also known as pseudo-boehmite, is a kind of aluminum hydroxide with fine particles, incomplete crystallization, and thin wrinkled sheets. Its water-containing state is a thixotropic gel with specific surface High, large pore volume and other characteristics. It can be used as the raw material for the production of catalyst carrier and activated alumina, as well as the molding binder for molecular sieves, silicate refractory products, etc., and the catalyst for the production of ethylene and ethylene oxide by alcohol dehydration. At present, it is an essential raw material for catalysts used in domestic catalytic reforming and xylene isomerization. [0003] At present, the domestic production methods of pseudo-boehmite are mainly carbonization and precipitation methods. The p...

Claims

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Application Information

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IPC IPC(8): C01F7/02B82Y40/00
CPCC01F7/30C01P2004/64
Inventor 辛秀兰黄树楷侯松松于洋徐宝财
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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