Catalytic conversion method and catalytic conversion device for productive low-carbon olefin

A low-carbon olefin and catalyst technology, which is applied in the field of catalytic conversion and devices of high-yield low-carbon olefins, can solve the problems that the yield needs to be further improved, there is no coupling optimization, etc., so as to reduce the hydrogen transfer reaction, reduce the thermal cracking reaction, reduce the Effect of dry gas yield
CN112680247AActive Publication Date: 2021-04-20CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2021-04-20

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Abstract

The invention relates to a catalytic conversion method and a device for productive low-carbon olefin, and the method comprises the steps: carrying out the contact reaction of a first hydrocarbon raw material and a catalyst from a regenerator in a first riser reactor, and carrying out the contact reaction of a heavy hydrocarbon raw material, a second hydrocarbon raw material and a catalyst from a regenerator in a second riser reactor, introducing the reacted oil mixture into the fluidized bed reactor for continuous reaction, sequentially performing contact reaction on a third hydrocarbon raw material and a catalyst from a regenerator in a first reaction zone and a second reaction zone of a third riser reactor, separating the reacted oil mixture through a separation device, and introducing the catalyst into a stripper for stripping; introducing heavy hydrocarbons into the bottom of the second riser reactor, and selecting the third hydrocarbon raw material from distillate oil with the distillation range of 180-360 DEG C, preferably distillate oil with the distillation range of 200-340 DEG C. The method provided by the invention can obviously improve the yields of ethylene and propylene.
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Description

technical field

[0001] The invention relates to a catalytic conversion method and device for prolific production of low-carbon olefins. Background technique

[0002] In recent years, with the continuous development of the chemical industry, the demand for low-carbon olefins such as ethylene and propylene has shown a rapid growth trend, and there is a large gap in the low-carbon olefins market. At present, the methods for producing low-carbon olefins mainly include steam cracking technology, catalytic cracking technology, propane dehydrogenation to propylene technology, and coal-to-methanol to olefins technology. Among them, steam cracking technology is the main source of low-carbon olefins. The ethylene produced by it accounts for more than 95% of the total ethylene output, propylene accounts for about 61% of the total propylene output, and the propylene produced by catalytic cracking technology accounts for about 34% of the total propylene output. . As steam cracking adop...

Claims

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