Catalyst for preparing propylene with ethylene and butene inverse-disproportionation and method of preparing the same

Abstract

The invention discloses a Mo-based catalyst for inverse disproportionate synthesis of propylene from ethylene and butylene and the preparation method thereof. The Mo-based catalyst is characterized in that: the catalyst is composed of A / S, wherein A as major active component is an oxide of molybdenum and S as carrier is a mixture. The preparation method of the catalyst includes the following steps: removing a mesoporous molecular sieve with a templating agent, preparing the carrier mixture S of a certain particle size by using aluminum oxide or a precursor thereof by different methods, immersing the resulting product in a Mo-containing solution, drying, and calcining at 500-800 DEG C for 1-4 hours to obtain the required catalyst. The invention utilizes the composite carrier composed of mesoporous molecular sieve and aluminum oxide. The catalyst has the advantages of simple preparation and excellent stability. Therefore, the catalyst prepared in the invention can be used for the production of propylene with high conversion rate, high selectivity and high stability.

Description

technical field [0001] The invention relates to a catalyst used for the reaction of ethylene and butene anti-disproportionation to produce propylene and a preparation method thereof. Background technique [0002] Propylene is one of the important basic raw materials for the development of petrochemical industry, and it is also the petrochemical product with the fastest growing demand in the world. The world's propylene demand has increased from 18 million tons in 1980 to nearly 50 million tons in 2000. Reached 75 million tons. The reaction of ethylene and butene to produce propylene is one of the methods to increase the output of propylene. Since the supply of butene exceeds the demand at present, especially the lack of effective utilization of 2-butene, the reaction process of ethylene, propylene and ethylene can be reasonably adjusted according to local conditions. Product layout of butene. In addition, the heavy oil catalytic cracking products include some crude ethylen...

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Problems solved by technology

The reaction is carried out in a fixed bed or fluidized bed reactor, the reaction temperature is 0-300°C; the weight space velocity: 0.01-3h ～1 ; C in the reaction feed gas 2 h 4 / 2~C 4 h 8 Ratio: 0.2~4; Reaction pressure: 0.1~2.0MPa, the catalyst preparation method is relatively complicated

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