Catalyst and preparation method and application thereof, and preparation method for durene

Abstract

The invention provides a catalyst and a preparation method and application thereof, and a preparation method for durene. The catalyst is mainly prepared from the following components by weight: 45 to 85% of a beta-molecular sieve, 10 to 55% of a binder and 0 to 10% of a modified element, wherein the binder is one or more selected from a group consisting of alumina, alumina sol and silica sol, and the modified element is one or more selected from a group consisting of zinc, iron, magnesium, calcium and rare earth elements. The catalyst has high catalytic activity to alkylation and can substantially improve the conversion rate of pseudocumene in preparation of durene from pseudocumene and methanol.

Description

technical field

[0001] The invention relates to the field of petrochemical industry, in particular to a catalyst, its preparation method, application and the preparation method of durene. Background technique

[0002] Durene is an important chemical raw material, mainly used in the production of homoanhydride, that is, pyromellitic dianhydride (PMDA). In recent years, the use of PMDA has continued to expand, for example, it can be used as an important raw material for high-quality powder coating matting agents, curing agents and plasticizers. In addition, PMDA can also be used to synthesize polyimide and so on. Polyimide is a new type of synthetic material with high temperature resistance, radiation resistance, impact resistance and excellent electrical and mechanical properties. It is widely used in the production of fibers, films, dipping paints, adhesives, casting parts and foam plastics Wait. Polyimide products have been widely used in the fields of aerospace, missile...