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Method for preparing shape-selective catalyst

A catalyst, a certain amount of technology, applied in the preparation of organic compounds, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of cumbersome preparation of shape-selective catalysts, high cost, and low shape-selective performance, and achieve improved shape-selective performance , low cost, and high shape-selective performance

Inactive Publication Date: 2014-03-05
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a simple and low-cost synthesis method for the preparation of shape-selective catalysts in the process of synthesizing p-alkylphenols and p-dialkylbenzenes. , a method for preparing a shape-selective catalyst with high shape-selective performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Weigh melamine (3 g), add it into dimethyl sulfoxide, wherein the mass ratio of melamine to dimethyl sulfoxide is 1:5, and raise the temperature to 50° C. to dissolve it completely. Then add 3g of microporous molecular sieve MCM-22 into the above solution, the mass ratio of melamine to microporous molecular sieve is 1:1, stir evenly, let it stand at room temperature for 24 hours, dry it in a water bath at 80°C, and then transfer it to air drying Dry it in an oven at 110°C for 6h, put it into a muffle furnace for calcination, use argon as a protective gas, raise the temperature to 500°C at 3°C / min and keep for 4h to obtain the desired shape-selective catalyst Cat1.

Embodiment 2

[0014] Weigh melamine (3 g), add it into dimethyl sulfoxide, wherein the mass ratio of melamine to dimethyl sulfoxide is 1:5, and raise the temperature to 50° C. to dissolve it completely. Then add 15g microporous molecular sieve MCM-22 into the above solution, the mass ratio of melamine to microporous molecular sieve is 1:5, stir evenly, let it stand at room temperature for 24 hours, dry it in a water bath at 80°C, and then transfer it to air drying Dry it in an oven at 110°C for 6h, put it into a muffle furnace for calcination, use argon as a protective gas, raise the temperature to 500°C at 3°C / min and keep for 4h to obtain the desired shape-selective catalyst Cat2.

Embodiment 3

[0016] Weigh melamine (3 g), add it into dimethyl sulfoxide, wherein the mass ratio of melamine to dimethyl sulfoxide is 1:5, and raise the temperature to 50° C. to dissolve it completely. Then add 9g of microporous molecular sieve MCM-22 into the above solution, the mass ratio of melamine to microporous molecular sieve is 1:3, stir evenly, let it stand at room temperature for 24 hours, dry it in a water bath at 80°C, and then transfer it to blast drying Dry it in an oven at 110°C for 6h, put it into a muffle furnace for calcination, use argon as a protective gas, raise the temperature to 500°C at 3°C / min and keep for 4h to obtain the desired shape-selective catalyst Cat3.

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PUM

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Abstract

The invention relates to a method for preparing a shape-selective catalyst. According to the method, a microhole molecular sieve ZSM-5 or MCM-22 is taken as a matrix; melamine is used as a precursor; carbon nitride (C3N4) is loaded on the outer surface of the microhole molecular sieve through immersing and calcining; during immersing, dimethyl sulfoxide (DMSO) is used as a solvent; and the mass ratio of melamine to the microhole molecular sieve is 1:1-1:5. The method has the advantages of simplicity, low cost, high shape-selective performance and the like; the acid site on the outer surface of the molecular sieve can be completely covered; and therefore, the shape-selective performance of the microhole molecular sieve is improved.

Description

technical field [0001] The invention relates to the field of preparation of a high-performance catalyst in an alkylation process, in particular to a preparation method for a shape-selective catalyst used in the synthesis of p-alkylphenol or p-dialkylbenzene. Background technique [0002] p-Alkylphenol is widely used in the production of phenolic resins, rubber anti-aging agents, surfactants and other important fields, and is also an important intermediate in the production of spices and pesticides. The synthesis methods of p-alkylphenol mainly include natural separation method, methylaniline diazotization hydrolysis method, methylbenzene chlorination hydrolysis method and phenol alkylation method. Among them, the first three methods have been gradually eliminated due to the complex process, serious corrosion in the production process and low product quality. The phenol alkylation method is a hot research topic at present. P-dialkylbenzene is also an important chemical raw m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/40B01J29/03C07C37/16C07C39/07C07C2/86C07C15/08
CPCY02P20/52
Inventor 薛冰李永昕柳娜许杰
Owner CHANGZHOU UNIV
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