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Preparation method of AL-MCM-41

An A1-MCM-41, a certain amount of technology, applied in chemical instruments and methods, molecular sieve catalysts, physical/chemical process catalysts, etc., can solve the problems of high cost, large amount, deactivation of catalytic active centers, etc.

Inactive Publication Date: 2016-05-11
SHAANXI YUHANG ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, ionic liquids have disadvantages such as large usage, high cost, deactivation of catalytic active centers due to filtration of ionic liquids during recycling, and the need to use a large amount of extractant when extracting products from ionic liquids.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0006] The preparation method of an ionic liquid according to the present invention mainly includes the following steps: (1) dissolving CTMAB in a certain amount of distilled water; (2) stirring in a water bath at 40°C until it is completely dissolved into a colorless transparent solution , add an aqueous solution of sodium silicate, and stir for 4 hours; (3) add an aqueous solution of aluminum sulfate, and stir for 6 hours; (4) use 2mol / L H 2 SO 4 Adjust the pH value of the system to 10.5, and the material ratio of each substance in the system is nSiO 2 %:nCTMAB%:nH 2 O=1:0.2:120, continue to stir and age for 4 hours, and put it into a stainless steel pressure vessel; (5) crystallize at 110°C for 4 days, after filtering, washing, and drying, the obtained product is heated in an air atmosphere at 1°C . Min -1 The temperature was raised to 550°C at a certain rate, and roasted for 6 hours to obtain AL-MCM-41 / AL-MCM-41 X sample.

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PUM

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Abstract

The invention relates to a preparation method of AL-MCM-41. The preparation method mainly includes following steps: (1), dissolving CTMAB in a certain amount of distilled water; (2), stirring in water bath at 40 DEG C, adding a water solution of sodium silicate after CTMAB is completely dissolved to form a colorless transparent solution, and stirring for 4 h; (3), adding a water solution of aluminum sulfate, and stirring for 6 h; (4), using 2 mol / L H2SO4 solution to adjust PH value of a system to 10.5, wherein an amount ratio of SiO2 to CTMAB to H2O in the system is 1:0.2:120; continuing stirring for aging for 4 h, and filling a stainless steel pressure kettle. The AL-MCM-41 sample prepared by the method is high in specific surface area, thermostability and hydrothermal stability.

Description

technical field [0001] The invention relates to a preparation method of AL-MCM-41. Background technique [0002] As a new type of environment-friendly solvent and liquid acid catalyst, ionic liquid has both the high density of reactive sites of liquid acid and the non-volatility of solid acid, wide liquid range, high stability, wide variety and structural adjustability . However, in practical applications, ionic liquids have disadvantages such as large amount of use, high cost, deactivation of catalytic active centers due to filtration of ionic liquids during recycling, and the need to use a large amount of extractant when extracting products from ionic liquids. In recent years, scholars have begun to explore the synthesis of supported ionic liquids and their applications in the fields of catalysis, separation, and polyelectrolytes. Ionic liquid loading is to immobilize or immobilize ionic liquid on a solid carrier by physical or chemical methods. Make the carrier surface...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/70B01J35/10
CPCB01J29/7038B01J2229/10B01J35/61
Inventor 郝青
Owner SHAANXI YUHANG ELECTRONICS