Catalyst for dimethyl ether preparation through methanol dehydration, its preparation method and application

Abstract

The invention discloses a catalyst for dimethyl ether preparation through methanol dehydration, its preparation method and application. The catalyst is composed of 30%-80% (dry basis weight) of a molecular sieve and 70%-20% (dry basis weight) of a binder, wherein, the molecular sieve is a Y-beta composite molecular sieve, and the binder is silica. The preparation method consists of: subjecting the hydrogen type Y-beta composite molecular sieve, the binder, a lubricating agent, and water to kneading and molding, then conducting drying and roasting so as to obtain the catalyst with high activity, high selectivity and good stability. The production process of the catalyst in the invention is simple, thus being in favor of industrial production and application.

Description

technical field

[0001] The invention relates to a catalyst for preparing dimethyl ether by methanol dehydration, a preparation method and application thereof. Background technique

[0002] Dimethyl ether (DME) is a class of ether chemical products. It is a colorless, non-toxic and environmentally friendly gas at normal temperature and pressure. It is widely used in industrial fields such as refrigeration, pharmaceuticals, dyes and pesticides. At the same time, dimethyl ether itself contains oxygen, has a short carbon chain, good combustion performance, high thermal efficiency, and its emission is lower than that of methanol and second only to hydrogen. It has great potential as a fuel to replace liquefied petroleum gas (LPG) and diesel, and is called the fuel of the 21st century. "Ultra Clean Energy".

[0003] Under the catalysis of solid acid, the preparation of dimethyl ether by methanol dehydration is a common method for producing dimethyl ether technology at present. T...

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