Flexible single-stage hydrocracking process

Abstract

The invention discloses a flexible single-stage hydrocracking process. The wax oil raw material is mixed with hydrogen and enters the single-stage hydrocracking reactor. After passing through the upper single-stage hydrocracking catalyst bed, the material is divided into two streams; The hydrocracking reactor and hydrogen enter the hydroisomerization cracking reactor for isomerization cracking reaction; the other material is a gas-liquid mixture flow, and the mixture flow continues to flow down through the lower single-stage hydrocracking catalyst bed; single-stage The hydrocracking reaction material and the hydroisomerization cracking reaction material are subjected to gas-liquid separation and fractionation respectively to obtain naphtha, aviation kerosene, diesel oil and tail oil products of different specifications. The invention provides a single-stage hydrocracking process for simultaneously producing two or more distillate oil products of different specifications on a set of hydrogenation devices, which can fully utilize the heat carried by partly cracked materials to realize a single-stage hydrocracking reactor Coupling operation with hydroisomerization cracking reactor.

Description

technical field [0001] The invention belongs to the field of petroleum refining, and in particular relates to a single-stage hydrocracking process for flexibly producing high-quality naphtha, jet fuel, diesel oil and tail oil products with different properties. Background technique [0002] Hydrogenation technology is an important processing method for lightening heavy oil and upgrading the quality of light oil. Hydrocracking technology has developed rapidly due to the advantages of strong feed oil adaptability, good product flexibility, high liquid product yield, and high product quality. The existing hydrocracking technology can be divided into three types according to the processing flow: one-stage series hydrocracking process, single-stage hydrocracking process and two-stage hydrocracking process. According to whether the tail oil is recycled or not, it can be divided into three types: one-way one-pass process, partial cycle process and full cycle process. Among them, ...

AI Technical Summary

Problems solved by technology

Therefore, when using the above hydrocracking processes alone, you can only choose different types of single-stage hydrocracking catalysts according to your needs, or use two kinds of molecular sieve composite catalysts, or choose two kinds of hydrocracking catalysts for use in grades, but these The process can only produce tail oil products of one nature, that is, the operation flexibility is relatively poor

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