Hydrogenation method for liquefied gas fraction

Abstract

The invention discloses a hydrogenation method for liquefied gas fraction, which is characterized by comprising the following steps of: filling at least one section of catalyst bed layer into a reactor, introducing a liquefied gas fraction raw material and hydrogen into the reactor from one or more sections of catalyst bed layers to contact a catalyst and perform hydrogenation saturation reaction, and reacting olefin in the liquefied gas fraction and the hydrogen to generate alkane and release a large amount of heat; after heat exchange, feeding the reaction product into a gas-liquid separator and separating the reaction product into a gas phase and a liquid phase, and introducing the separated gas phase flow into the reactor to perform repeated use; and introducing a part of separated liquid phase flow serving as a cyclic reaction product back to the reactor, and introducing the other part of the separated liquid phase flow serving as a liquefied gas fraction hydrogenation product out of the reactor to perform reuse. The hydrogenation product obtained by the method is saturated light hydrocarbon fraction which can be directly used as a raw material for an ethylene cracking device and also can be fractionated and cut into propane, n-butane and iso-butane and the like serving as high value-added chemical base raw materials so as to increase the economic benefit of an oil refining enterprise.

Description

technical field [0001] The invention belongs to a hydrogenation saturation process of light hydrocarbons, in particular to a hydrogenation method of liquefied gas fractions. Background technique [0002] The main components of liquefied gas fractions are C3, C4 alkanes and olefins, and a small amount of C2 and C5 hydrocarbons. In the secondary processing of oil products, processes such as thermal cracking, coking and catalytic cracking will produce liquefied gas fractions. Since the cracking reaction is a process in which macromolecular hydrocarbons are decomposed into small molecular hydrocarbons, saturated hydrocarbons will generate saturated hydrocarbons and olefins after the cracking reaction. Therefore, the cracking reaction products contain a large amount of olefins, and the content of olefins in the liquefied gas fraction is 10v %~80v%. [0003] After the liquefied gas fraction is treated with alkali elution and mercaptan, there are usually the following treatment s...

AI Technical Summary

Problems solved by technology

Therefore, research institutions have done little research on the hydrogenation technology of liquefied gas fractions, and there are no reports on complete technology and product solutions

Images