A flexible single-stage two-agent hydrocracking process

Abstract

The invention discloses a flexible single-stage two-agent hydrocracking process. The wax oil raw material is mixed with hydrogen and enters the single-stage two-component hydrocracking reactor. The material after passing through the upper hydrogenation pretreatment catalyst and the single-stage hydrocracking catalyst bed is divided into two streams; one stream of material is drawn out from the middle of the bed. stage reactor, enters 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 single-stage hydrocracking reaction material and hydroisomerization cracking The reaction materials are separated and fractionated separately to obtain distillate oil and tail oil products of different specifications. The invention provides a single-stage two-dose 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 fully Using the heat carried by part of the cracked material, the coupling operation of the single-stage two-component hydrocracking reactor and the hydroisomerization cracking reactor is realized.

Description

technical field [0001] The invention belongs to the field of petroleum refining, and in particular relates to a single-stage two-dose hydrocracking process for flexibly producing high-quality naphtha, jet fuel, diesel oil and tail oil products of 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...

AI Technical Summary

Problems solved by technology

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

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