Catalyst for preparing isobutene by dissociation of methyl tert-butyl ether, preparation method and use thereof

US9708229B2 · kind B2 · utility

Assignees

• CHINA PETROLEUM & CHEMICAL CORPORATION · CN
• Fushun Research Institute of Petroleum and Petrochemicals, SINOPEC CORP. · CN

Inventors

• Shumei Zhang · 东风镇, CN
• Kai Qiao · Zhoushan City, CN
• Ming J. Chen · Valley Cottage, US
• Qingtong Zhai · 东风镇, CN
• Changxin Guo · 东风镇, CN
• Chunmei Wang · 东风镇, CN

Key dates

• Filing date: Oct 24, 2012
• Grant date: Jul 18, 2017
• Expiry date: Jan 5, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2529/06
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Disclosed is a catalyst for preparing isobutene by dissociation of methyl tert-butyl ether, the catalyst comprising amorphous silica alumina and a silicalite-1 molecular sieve, wherein the total IR acid amount of weak acids in the catalyst is in a range from 0.020 to 0.080 mmol/g, and the ratio of B acid/L acid of the weak acids is in a range from 2.5:1 to 4.0:1. Also provided is a method of preparing the catalyst and the use thereof. The catalyst has a high selectivity with respect to isobutene, and high conversion of methyl tert-butyl ether, and can also effectively inhibit formation of the by-product dimethyl ether.