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Process for catalytic thermocracking of bydrocarbon by descending-bed reactor

A catalytic pyrolysis and bed reactor technology, applied in the field of fractionation and cracking of petroleum products, can solve the problems of long gas-solid contact time, radial non-uniformity, impact on economy and popularization and application, high olefin content, etc., and achieve increased stability , low production cost and high yield

Inactive Publication Date: 2005-03-23
TSINGHUA UNIV
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Problems solved by technology

Due to the large gas-solid back-mixing, long gas-solid contact time and serious radial non-uniformity in the riser reactor used, their yields of by-products such as methane and coke are relatively high, and the olefin content of the obtained liquid product is relatively high. High and unstable, affecting its economy and popularization and application

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  • Process for catalytic thermocracking of bydrocarbon by descending-bed reactor
  • Process for catalytic thermocracking of bydrocarbon by descending-bed reactor

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Embodiment Construction

[0009] The invention is a method for catalytic thermal cracking of hydrocarbons by using a down-bed reactor. That is, when the catalytic thermal cracking process is carried out in the down-bed reactor, the raw material oil and catalyst enter the reactor through the catalyst inlet section, realize uniform distribution on its cross section, and enter the oil agent mixing area, and the raw material oil depends on the action of steam at the same time Realize atomization, and quickly contact and mix with the high-temperature catalyst, the gas-solid mixture flows downward, and the cracking reaction occurs at the same time, generating high-temperature oil and gas including a wide-boiling hydrocarbon mixture; the catalyst loses catalytic activity due to coke deposition on it, after regeneration Reuse; the gas-solid mixture of high-temperature oil and gas stays in the reactor for a short time, and is quickly separated by the gas-solid rapid separation device at the end of the down-bed r...

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Abstract

A process for catalytic cracking of hydrocarbons by descending-bed reactor features that the crude oil takes part in catalytic thermocracking reaction under the action of high temp and catalyst to obtain the gas prdouct whose main component is light olefine (ethylene, propylene and butylene) and the liquid product rich in arylhydrocarbon. Its advantages are high output rate of light hydrocarbons, thorough suppression to by-products (methane and coke), and easy control.

Description

technical field [0001] The invention belongs to the technical category of fractionation and cracking of petroleum products. In particular, it relates to a method for catalytic thermal cracking of hydrocarbons using a down-bed reactor to obtain high-yield light olefins and stable, aromatic-rich liquid phase products from hydrocarbons. technical background [0002] Light olefins with carbon-carbon unsaturated bonds are an important class of organic chemical raw materials. Starting from them, a variety of polymer materials such as plastics, rubber, and fibers can be synthesized, and other chemical products can also be produced through processes such as alkylation. Especially ethylene, its output is usually used as a symbol to measure the development level of a country's petrochemical industry. The source of light olefins is not the only one, the initial propylene etc. are the by-products of the catalytic cracking unit. When the tube furnace pyrolysis process appeared, olefin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G11/00C10G11/18
Inventor 魏飞张琪皓李强邓任生金涌
Owner TSINGHUA UNIV
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