Catalyst for production of propylene and ethylene with carbon alkatetraenes, regeneration and uses thereof

Abstract

The invention discloses catalyst for preparing propylene and ethylene with C4 fraction and a regeneration method and application thereof, which belongs to the technical proposal of low molecular alkene preparing the propylene and ethylene, and relates to catalyst including 25 to 40 percent of high silica zeolite, 45 to 65 percent of silica and 10 to 15 percent of modified component provided for solving the problems of the prior art that the operation cycle is short, the selectivity is poor and the catalyst regeneration method is not provided, and the C4 mixture not including diolefin is takenas the raw material, water vapor is used as diluent, and the reaction is realized in a fixed-bed adiabatic reactor to produce the propylene and ethylene. The catalyst of the invention can be reused after being regenerated. The process of preparing propylene and ethylene of the invention has simple process and convenient operation, the operation cycle of the catalyst is long, the propylene and ethylene can be prepared for a long time with high efficiency, and the regeneration method of the catalyst of the invention is simple, and the service life is long.

Description

technical field

[0001] The present invention relates to the catalyst and method of utilizing low molecular weight olefins to produce propylene and ethylene, more specifically, the present invention relates to the C4 raffinate of ethylene plant or the C4 fraction of oil refinery under the effect of catalyst, in fixed bed adiabatic reactor Processes for the production of propylene and ethylene as well as catalysts used and methods for their regeneration. Background technique

[0002] With the rapid development of the national economy, propylene is an important organic raw material second only to ethylene, and its demand is also increasing, and its development speed is increasing. In 2002, the global propylene output was 56.95 million tons, and the demand in 2010 will reach 88 million tons. At present, the supply of propylene in my country is in short supply, and the traditional method of increasing propylene production can no longer meet the demand of the market. Hydrocarbon...

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