A Catalytic Cracking Method for Improving Heat Distribution

Abstract

The present invention relates to a catalytic cracking method for improving heat distribution, the method comprising: (1), feeding catalytic cracking feedstock oil into the first reaction zone of a catalytic cracking reactor to contact with a catalytic cracking catalyst and performing the first catalytic cracking reaction (2), continuing the second catalytic cracking reaction in the second reaction zone of the catalytic cracking reactor with the first reaction product and the half spent catalyst of the gained, to obtain the second reaction product and the spent catalyst; into the second reaction zone of the catalytic cracking reactor to contact with the first reaction product and the half spent catalyst and carry out the second catalytic cracking reaction together. The method of the invention can improve the heat distribution of the catalytic cracking reactor and improve the distribution of reaction products.

Description

technical field

[0001] The invention relates to a catalytic cracking method for improving heat distribution. Background technique

[0002] Low carbon olefins (C 2 -C 4 Olefins) as basic organic chemical raw materials play a pivotal role in modern petroleum and chemical industries, especially ethylene and propylene. The methods for preparing low-carbon olefins can be roughly divided into two categories, namely traditional petroleum routes and emerging non-petroleum routes. The traditional methods of producing light olefins from petroleum are mainly steam cracking and catalytic cracking processes. Since the 10s of the 20th century, countries around the world have been devoting themselves to the research and development of routes to produce low-carbon olefins from non-petroleum resources, and some progress has been made.

[0003] Chinese patent CN92109905 discloses a catalyst and reaction process for converting methanol into light olefins, a ZSM-5 zeolite catalyst containin...

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