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Solid acid catalyst based on MCM-41 mesoporous molecular sieve as well as preparation method and application of solid acid catalyst

A technology of MCM-41 and solid acid catalyst, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of complex production process, lack of types, poor stability, etc., and achieve low raw materials and short synthesis cycle The effect of short, simple preparation method

Pending Publication Date: 2022-07-29
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the existing problems of complex production process, high cost, poor stability, and lack of species in the existing catalysts for decarboxylation of γ-valerolactone to butene, the present invention provides a short synthesis cycle, low cost, and favorable for mass production. Al-MCM-41 Catalyst Synthesis Method

Method used

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  • Solid acid catalyst based on MCM-41 mesoporous molecular sieve as well as preparation method and application of solid acid catalyst
  • Solid acid catalyst based on MCM-41 mesoporous molecular sieve as well as preparation method and application of solid acid catalyst
  • Solid acid catalyst based on MCM-41 mesoporous molecular sieve as well as preparation method and application of solid acid catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 Solid acid catalyst S(1) based on MCM-41 mesoporous molecular sieve

[0029] (1) The preparation method is as follows

[0030] 1. Preparation of MCM-41 mesoporous molecular sieve

[0031] Dissolve 7.289 g of CTAB in 40 mL of distilled water and stir vigorously until a clear solution is formed. Dissolve 28.42 g of sodium silicate nonahydrate in 40 mL of distilled water until the sodium silicate is completely dissolved. Then, the CTAB solution was slowly added to the aqueous sodium silicate solution, and after stirring was continued for 30 min in a water bath at 35°C, the reaction solution was adjusted to pH=11 with a mixed solution of concentrated sulfuric acid and distilled water with a volume ratio of 1:1, and stirring was continued for 3 h. The reaction mixture was transferred to an autoclave, hydrothermally reacted at 120 °C for 24 h, filtered, washed and dried. Finally, the obtained solid was calcined at 550 °C for 6 h to obtain MCM-41 mesoporous molecula...

Embodiment 2

[0038] Example 2 Solid acid catalyst S (2) based on MCM-41 mesoporous molecular sieve

[0039] The method is the same as in Example 1. Just step 2, with 0.0148g AlCl 3 Instead of 0.1038g AlCl in Example 1 3 , to obtain Al-MCM-41 solid acid catalyst whose Al atomic mass is 1% by mass of MCM-41 mesoporous molecular sieve, named as 1wt% Al-MCM-41 catalyst, and marked as catalyst S(2).

Embodiment 3

[0040] Example 3 Solid acid catalyst S (3) based on MCM-41 mesoporous molecular sieve

[0041] The method is the same as in Example 1. Just step 2, with 0.0445g AlCl 3 Instead of 0.1038g AlCl in Example 1 3 , to obtain an Al-MCM-41 solid acid catalyst whose Al atomic mass is 3% of the mass of MCM-41 mesoporous molecular sieve, which is named as 3wt% Al-MCM-41 catalyst and marked as catalyst S(3).

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Abstract

The invention relates to a solid acid catalyst based on an MCM-41 mesoporous molecular sieve as well as a preparation method and application of the solid acid catalyst. According to the invention, Al is introduced into an MCM-41 mesoporous molecular sieve skeleton through an impregnation method to form Lewis and Bronsted solid acid sites. In a tank reactor, stirring reaction is carried out for 2 h under the reaction conditions that the initial pressure is atmospheric pressure, the temperature is 300 DEG C and the speed is 700 r / min, and then the yield of butene prepared by catalyzing gamma-valerolactone decarboxylation can reach 90% or above. The catalyst disclosed by the invention has the advantages that the catalyst preparation process is simple, the synthesis period is short, the cost is low, and large-batch production can be realized; the obtained catalyst has a relatively large specific surface area; the catalytic reaction conditions are mild, the high butene yield can be achieved within the very short reaction time, and the catalytic stability is good. Therefore, the catalyst provides more thoughts and methods for efficient development and utilization of biomass energy.

Description

technical field [0001] The invention relates to a catalyst for catalyzing the decarboxylation of γ-valerolactone to produce butene, in particular to a catalyst for decarboxylation of γ-valerolactone, a biomass platform compound with large specific surface area, short synthesis period, low cost and mild catalytic reaction conditions The preparation and application of a solid acid catalyst for producing butene belong to the field of developing renewable clean energy. Background technique [0002] Butene is an important energy fuel and an important raw material for the production of gasoline, diesel, aviation fuel, basic chemical products, rubber, fibers, plastics and other polymer chemicals. So far, the large-scale production of butene is still strongly dependent on fossil energy, which will not only bring serious environmental pollution problems, but also be detrimental to the sustainable development of human civilization. In this context, people gradually began to seek a ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/04B01J35/10C07C1/213C07C11/08
CPCB01J29/041C07C1/213B01J2229/183B01J35/647C07C11/08
Inventor 熊英杜欣伟于海彪单炜军崔俊硕娄振宁冯小庚王月娇高婧
Owner LIAONING UNIVERSITY
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