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

A technology of methyl tert-butyl ether and isobutylene, which is applied in the field of cracking catalysts and its preparation, can solve the problems of easy drop-off of sulfonic acid groups, short service life of catalysts, and deactivation of catalysts, and achieve high temperature resistance, high activity, highly selective effect

Active Publication Date: 2013-12-11
KAIRUI ENVIRONMENTAL PROTECTION TECH
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  • Abstract
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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 to

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Put the perfluorosulfonic acid resin into the reaction kettle, add methanol as a dispersant, in terms of mass, methanol / perfluorosulfonic acid resin = 400%; then add boron trifluoride ether solution, the solution mass concentration is 30% , by mass, boron trifluoride / perfluorosulfonic acid resin = 5%, the temperature is 50°C, stirred for 48 hours, and washed repeatedly with methanol to obtain the reaction catalyst product of methyl tert-butyl ether cracking to isobutylene, the code is KRB- 1.

Embodiment 2

[0021] On a mass basis, boron trifluoride / perfluorosulfonic acid resin=10%, and the others are the same as in Example 1, and the obtained product number is KRB-2.

Embodiment 3

[0023] In terms of mass, boron trifluoride / perfluorosulfonic acid resin=20%, the others are the same as in Example 1, and the obtained product number is KRB-3.

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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...

Claims

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Application Information

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IPC IPC(8): B01J31/10C07C11/09C07C1/20
Inventor 张勇王金明
Owner KAIRUI ENVIRONMENTAL PROTECTION TECH
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