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Preparation method of highly pure pseudoboehmite

A pseudo-boehmite and high-purity technology, which is applied in the field of high-purity pseudo-boehmite preparation, can solve the problems of uneven pore size, low crystal phase purity, and unstable products, and achieve stable products and no three wastes Emission, the effect of a single crystal phase

Active Publication Date: 2017-07-11
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the methods of producing pseudo-boehmite in China are mainly carbonization and precipitation methods. The products produced by the existing pseudo-boehmite production process have high impurities, may have uneven pore diameters, low crystal phase purity, and unstable products.

Method used

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  • Preparation method of highly pure pseudoboehmite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 10 grams of metallic aluminum, 0.02 grams of aluminum trichloride and 63 grams of n-hexanol into a four-neck flask, heat to 110°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 was completed, 99.7 g of trimethylbenzene was added to the flask, the temperature was raised to 110° C., and a mixture of tri-n-hexyloxyaluminum and trimethylbenzene was obtained by filtration. Add 30 mL of deionized water into the flask and raise the temperature to 85°C. A mixture of tri-n-hexaneoxyaluminum and trimethylbenzene at a temperature of 85°C was added dropwise to the flask while stirring was started, and the dropwise addition was completed in 30 minutes. The mixture of n-hexanol and trimethylbenzene produced by the hydrolysis of aluminum alkoxide was extracted from the flask. Add 225mL of deionized water to the flask and raise the temperature to 85°C, age for 12 hours and t...

Embodiment 2

[0023] The mixture of n-hexanol and trimethylbenzene extracted after the completion of hydrolysis in Example 1 continues to be used after dehydration treatment. Add a mixture of 10 grams of aluminum metal, 0.01 grams of aluminum trichloride, 0.01 grams of aluminum n-hexyl alcohol and 96.7 grams of n-hexanol and trimethylbenzene into a four-necked flask, and heat to 120°C to start the reaction. When a large number of bubbles are generated in the flask, the remaining n-hexanol and The trimethylbenzene mixture was slowly added dropwise into the flask, and filtered to obtain a mixture of tri-n-hexyloxyaluminum and trimethylbenzene. Add 30 mL of deionized water into the flask, raise the temperature to 85°C, and start stirring. Add the mixture of aluminum alkoxide and trimethylbenzene dropwise to the flask, and the dropwise addition is completed in 30 minutes. The mixture of n-hexanol and trimethylbenzene produced by the hydrolysis of aluminum alkoxide was extracted from the flask....

Embodiment 3

[0025] Add 10 grams of aluminum metal, 0.02 grams of aluminum trichloride and 45.7 grams of n-butanol into a four-necked flask, and heat to 100°C to start the reaction. When a large number of bubbles are generated in the flask, slowly drop 91.3 grams of n-butanol into the flask. After the reaction was completed, 90 grams of 200# solvent oil was added to the flask, the temperature was raised to 110° C., and the mixture of aluminum alkoxide and mesitylene was obtained by filtration. Add 30 mL of deionized water into the flask, raise the temperature to 85°C, and start stirring. Add the mixture of aluminum alkoxide and 200# solvent naphtha dropwise to the flask, and the dropwise addition is completed in 30 minutes. Extract the mixture of n-butanol and 200# solvent naphtha produced by the hydrolysis of aluminum alkoxide from the flask. Add 225mL of deionized water to the flask and raise the temperature to 85°C, age for 12 hours and then filter. The filter cake was dried at 120°C ...

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Abstract

The invention provides a preparation method of highly pure pseudoboehmite. The method comprises the following steps: 1, alkoxylaluminum preparation; 2, filtering; 3, a hydrolysis reaction; 3, alcohol separation; 4, ageing and alcohol distillation; and 6, filtering, and drying for preparing the highly pure pseudoboehmite. The pseudoboehmite product prepared in the invention has the advantages of low impurity content, concentrated pore distribution and good stability. The preparation method has the advantages of environmental protection, no discharge of three wastes, and realization of recycling of the recovered alcohol and solvent after treatment, and the obtained product can be widely applied to catalytic reforming and catalytic hydrogenating carriers.

Description

technical field [0001] The invention belongs to the field of catalyst materials, in particular to a preparation method of high-purity 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. The product γ-Al calcined at 400-700℃ 2 o 3 Widely used as catalyst carrier, catalyst and adsorbent, etc.; calcined at 1100-1200°C to obtain nano-sized γ-Al 2 o 3 , widely used as coating additives, high-grade ceramics, high-efficiency catalysts for p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/42B01J21/04B01J32/00
CPCB01J21/04C01F7/42C01P2006/12C01P2006/14C01P2006/16
Inventor 辛秀兰于刚于雷崔志力黄树楷徐宝财于洋
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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