Anti-sintering catalyst for preparing low-carbon olefin by low-carbon alkane dehydrogenation and preparation method thereof

Abstract

The invention relates to a platinum-tin catalyst of low-carbon alkane dehydrogenation and a preparation method thereof, and mainly solves the problem that in the prior art, in high temperature and carbon burning processes of a catalyst, metal platinum particles are easy to coalesce to grow up to affect the stability of the catalyst. According to the platinum-tin catalyst of low-carbon alkane dehydrogenation and the preparation method thereof, a technical scheme is adopted to well solve the problem, the technical scheme is shown as follows: first introducing assistants of alkalinous metals such as calcium, magnesium and the like into an alumina carrier by a coprecipitation method to get a compound metal oxide carrier, then using a dipping method to load tin and platinum components, namely dipping an aqueous solution of soluble salts of the platinum and tin components, and thus obtaining the platinum-tin catalyst by drying, roasting and water vapor treatment. The platinum-tin catalyst of low-carbon alkane dehydrogenation and the preparation method thereof can be used in industrial preparation of the catalyst for preparing low-carbon olefin by low-carbon alkane dehydrogenation.

Description

technical field [0001] The invention relates to a catalyst for producing low-carbon olefins by dehydrogenating sintering-resistant low-carbon alkanes and a preparation method thereof. Background technique [0002] Propylene / isobutylene mainly comes from the co-production or by-product of steam cracking and fluid catalytic cracking in refineries, and can be widely used in the synthesis of polymers, gasoline additives, rubber and various chemical intermediates. With the increasing demand for low-carbon olefins, the traditional production process is difficult to meet the rapid growth of market demand. A large amount of low-carbon alkanes obtained from refineries are the main components of liquefied petroleum gas, which are mainly used as civil fuels. The development of the process of producing low-carbon alkenes from low-carbon alkanes is of great significance for making full use of low-carbon alkanes to open up new sources of alkenes. At present, propane catalytic dehydrogen...

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Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is that in the existing preparation technology, the metal particles of the catalyst are easy to aggregate and grow up in the process of high temperature and charcoal burning, which affects the performance of the catalyst. It provides a new anti-sintering low-carbon alkane dehydrogenation A catalyst for producing low-carbon olefins. This catalyst is used in the process of producing low-carbon alkanes from dehydrogenation of low-carbon alkanes. It has the advantages that metal particles are not easy to aggregate and grow, and the catalyst has high stability under high temperature and charcoal regeneration conditions.

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