Residual oil hydrogenation treatment and catalytic cracking combined processing method

Abstract

The invention discloses a residual oil hydrogenation treatment and catalytic cracking combined processing method, which comprises: performing the hydrogenation reaction of a residual oil raw material in the presence of hydrogen and a hydrogenation treatment catalyst, and performing gas-liquid separation of efflux of hydrogenation reaction, wherein a gas phase is circularly used in a hydrogenation reaction, and a liquid phase is fractioned to form a light component and a heavy component; allowing a light component to enter a reactor from the bottom of a catalytic cracking riser reactor, allowing a heavy component to enter the reactor as secondary feed of the catalytic cracking riser reactor and performing a catalytic cracking reaction; and separating a dry gas, a liquefied gas and a gasoline fraction from efflux of a catalytic cracking reaction, wherein the fractions of diesel are not separated and enter a residual oil hydrogenation device after filtration. Compared with the prior art, the method can produce high-octane number gasoline and high-added-value liquefied gas to a maximum degree; meanwhile, the method can fully utilizes reaction heat and reduces production energy consumption.

Description

technical field [0001] The invention relates to a method for lightening residue oil, specifically a process for producing high-octane gasoline products by organically combining residue oil hydrotreating and catalytic cracking and using residue oil as a raw material. Background technique [0002] As crude oil becomes heavier and worse, more and more residues need to be processed. The processing of heavy and residual oil not only needs to crack it into products with low boiling point, such as naphtha, middle distillate oil and vacuum gas oil, etc., but also to increase their hydrogen-carbon ratio, which requires decarbonization or Hydrogenation method to achieve. The decarbonization process includes coking, solvent deasphalting, heavy oil catalytic cracking, etc.; hydrogenation includes hydrocracking, hydrofining, etc. The hydrogenation method can not only hydrogenate and convert residual oil, improve the yield of liquid products, but also remove heteroatoms, which is benefi...

AI Technical Summary

Problems solved by technology

In addition, it is also necessary to set up a more sophisticated fractionation system to fractionate naphtha and diesel fractions, which increases investment costs; due to heat exchange in the process, heat energy loss is more; at the same time, both hydrotreating units and catalytic cracking units have diesel products, which are relatively The overall yield of gasoline and gas products will be reduced

Images