A 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, and the material passing through the upper single-stage hydrocracking catalyst bed is divided into two streams; one stream of material is drawn out of the single-stage hydrocracking reactor through the middle of the bed, and Enter the hydroisomerization cracking reactor for isomerization cracking reaction; another stream of material continues to flow down through the lower single-stage hydrocracking catalyst bed; the obtained single-stage hydrocracking reaction material and hydroisomerization cracking reaction material are respectively Carry out gas-liquid separation and fractionation to obtain naphtha, jet fuel, diesel and tail oil products of different specifications. The present invention provides for the first time a single-stage hydrocracking process for simultaneously producing two or more different specifications of light naphtha, heavy naphtha, jet fuel, diesel oil, and tail oil products on a set of hydrogenation process equipment, which can make full use of The heat carried by part of the cracked material realizes the coupled operation of the single-stage hydrocracking reactor and the 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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