Supported catalyst, preparation method and applications thereof

A supported catalyst and catalyst technology, applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems that have not been found to synthesize isobutylene with high selectivity from methyl bromide, and the selectivity of a single product is not high, and achieve the preparation method Simple, mild reaction conditions, easy industrialization effect
CN106140262AActive Publication Date: 2016-11-23CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2016-11-23

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Abstract

The invention discloses a supported catalyst, its preparation method and application. The supported catalyst is composed of zinc oxide, zinc bromide, additive oxide and magnesium-modified hydrogen-type ZSM-5 molecular sieve carrier. According to the weight content of the catalyst, the content of zinc oxide is 0.5%-20%. The zinc content is 10%-50%, and the weight content of the auxiliary oxide in the catalyst is 0.1%-10% in terms of metal elements. The preparation method of the catalyst comprises the following process: (1) treating the hydrogen ZSM-5 molecular sieve with a magnesium salt solution to obtain a magnesium-modified ZSM-5 molecular sieve carrier; (2) introducing zinc oxide into the magnesium-modified hydrogen Type ZSM-5 molecular sieve carrier; (3) carry out bromination treatment on the carrier after introducing zinc oxide; (4) prepare auxiliary oxide; (5) introduce auxiliary oxide into step (3) brominated in the material. The catalyst can convert methyl bromide into isobutene with high selectivity.
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Description

technical field

[0001] The invention relates to a supported catalyst and its preparation method and application, in particular to a supported catalyst with modified ZSM-5 molecular sieve as a carrier, its preparation method and application. Background technique

[0002] Isobutene is an important basic organic chemical raw material. Its derivative products are numerous, the upstream and downstream industrial chains are complicated, and the consumption structure shows a trend of diversification. A variety of high value-added products can be prepared from isobutylene, such as: butyl rubber, polyisobutylene, methyl tert-butyl ether, isoprene and organic glass and other organic chemical raw materials and fine chemical products. As the market scale of isobutene downstream products continues to expand, the contradiction between supply and demand will gradually become prominent, especially in the context of the depletion of oil resources, the output of isobutene has become a key bot...

Claims

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