Preparation method of iron-containing MCM-41 molecular sieve membrane used for catalyzing phenol hydroxylation

Abstract

The invention relates to a preparation method of an iron-containing MCM-41 mesoporous molecular sieve membrane used in a process for preparing dihydroxybenzene through phenol hydroxylation. According to the invention, an in-situ hydrothermal synthesis method is adopted; the proportions of a silicon source, an iron source, a templating agent and a complexing agent are adjusted; and synthesis conditions are adjusted, such that the iron-containing mesoporous molecular sieve membrane with good catalytic performance is synthesized. Problems of the separation of catalyst and reaction liquid, poor reaction effect and the like are solved. The method has a good industrial application prospect.

Description

technical field [0001] The invention relates to a preparation method of an iron-containing MCM-41 mesoporous molecular sieve membrane used to catalyze phenol to produce hydroquinone, which belongs to the field of mesoporous materials. Background technique [0002] As an important chemical raw material and intermediate, hydroquinone is widely used in many fields such as spices, dyes, developers, inhibitors, medicines, pesticides and coatings. [0003] The traditional synthesis methods of hydroquinone, such as aniline oxidation method, ortho-chlorophenol hydrolysis, etc., in these methods, strong acids, strong bases, water-soluble metal ions and metal complexes are often used as catalysts, the process is complicated, and the equipment is seriously corroded , The amount of three wastes is large, and the pollution caused is quite serious. [0004] Oxidation of phenol with hydrogen peroxide has become the most important method for the synthesis of quinone due to its short synthe...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of separation of the catalyst and the reaction solution in the hydroxylation reaction of phenol, and provide a catalyst rich in active center iron, with uniform distribution of active centers and a high degree of mesoporous order for catalyzing phenol to produce dibenzene The preparation method of phenolic iron-containing MCM-41 mesoporous molecular sieve membrane, which not only solves the separation problem of catalyst and reaction solution, but also has the advantages of high catalytic activity, clean reaction at room temperature and no pollution.