Catalyst for methyl tert-butyl ether cracking reaction to prepare isobutene and preparation method thereof

Abstract

The invention provides a catalyst for methyl tert-butyl ether cracking reaction to prepare isobutene and a preparation method thereof. The catalyst is prepared through supporting boron trifluoride with perfluorinated sulfonic resin as a support. Perfluorinated sulfonic resin supplies a B-acidity active site to the catalyst, and boron trifluoride supplies an L-acidity active site to the catalyst, so that the temperature resistance of the catalyst is high, the catalyst can still keep relatively-high activity after long-term operation, and the service life of the catalyst is long.

Description

technical field [0001] The invention relates to a cracking catalyst and a preparation method thereof, in particular to a catalyst for the reaction of producing isobutylene by cracking methyl tert-butyl ether and a preparation method thereof. technical background [0002] As an important chemical raw material, the demand for isobutene continues to grow. At the same time, due to the continuous improvement of the purity requirements of isobutene in the production of many chemicals, the research and development of MTBE cracking to produce isobutene technology has undoubtedly been promoted. The MTBE synthesis process is matched with the cracking process, forming a relatively advanced process route for the separation of C4 and the production of high-purity isobutene, making the preparation of isobutene by etherification the most researched and most widely used method in the current industrial production of isobutene . The reaction process of MTBE cracking to produce isobutene is...

AI Technical Summary

Problems solved by technology

[0009] The above-mentioned patented technologies all have the shortcoming that the service life of the catalyst is relatively short, and after coke is accumulated on the surface of the catalyst, the catalyst is quickly deactivated. Generally, the cation exchange resin is acidic after being exchanged with acid, so it has certain activity for MTBE cracking.

However, due to the poor tolerance of ion exchange resins to high temperatures, when the reaction temperature is too high, the sulfonic acid groups are easy to fall off, and the resin will be deformed, so the stability is not high. Frequent replacement of catalysts will affect production efficiency and increase production costs, so how to Prolonging the service life has become an urgent problem to be solved

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