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A flexible two-stage hydrocracking process

A hydrocracking and hydroisomerization cracking technology, which is applied in the fields of hydrotreating process, hydrocarbon oil treatment, petroleum industry, etc., can solve problems such as poor operational flexibility, and achieve low freezing point, low freezing point, and high paraffin content Effect

Active Publication Date: 2021-05-04
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

Therefore, when the above-mentioned two-stage hydrocracking processes are used alone, different types of hydrocracking catalysts can only be selected according to needs, or two kinds of molecular sieve composite catalysts are used, or two kinds of hydrocracking catalysts are used in gradation, 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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Embodiment 1-3

[0047] Protective agents FZC-100, FZC-105 and FZC106 are hydrogenation protective agents developed and produced by Sinopec Fushun Petrochemical Research Institute; catalyst FF-56 is developed and produced by Sinopec Fushun Petrochemical Research Institute Hydrotreating catalyst; Catalyst FC-32 is a hydrogenation upgrading catalyst developed and produced by Fushun Petrochemical Research Institute of China Petrochemical Corporation, containing Y-type molecular sieve; Catalyst FC-20 is a research and development product of Fushun Petrochemical Research The hydroisomerization cracking catalyst developed and produced by the Institute contains β-type molecular sieves.

[0048] Table 1 Main properties of wax oil feedstock

[0049]

[0050] Table 2 process conditions

[0051]

[0052] Continued Table 2 Process Conditions

[0053]

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Abstract

The invention discloses a flexible two-stage hydrocracking method. The wax oil raw material enters the separation system after hydrogenation pretreatment and mild hydrocracking, and the separated liquid phase without impurities is divided into two parts, one part of the liquid phase enters the hydrocracking reactor using the reducing state hydrocracking catalyst, and the other A part of the liquid phase is mixed with the hydrocracking tail oil and enters the hydroisomerization cracking reactor using the reduced hydroisomerization cracking catalyst, and the obtained hydrocracking reaction material and the hydroisomerization cracking reaction material are subjected to gas-liquid separation and fractionation respectively , to obtain different specifications of naphtha, jet fuel, diesel and tail oil products. The present invention provides for the first time a two-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.

Description

technical field [0001] The invention belongs to the field of petroleum refining, and in particular relates to a two-stage hydrocracking method for flexibly producing high-quality light naphtha, heavy 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 proce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/00
CPCC10G67/00
Inventor 刘涛张学辉李宝忠黄玉洪吴锐方向晨
Owner CHINA PETROLEUM & CHEM CORP
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