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Flexible two-stage hydrocracking process

A technology for hydrocracking and hydroisomerization cracking, which is used in hydrotreating process, petroleum industry, treatment of hydrocarbon oil, etc. It can solve the problems of poor operation flexibility and achieve the effect of high viscosity index and low freezing point.

Active Publication Date: 2019-07-09
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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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

Method used

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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 process. A wax oil raw material is subjected to hydrogenation pretreatment and mild hydrocracking and then enters a separation system; the separated liquid phase is divided into two parts; one part of the liquid phase enters a hydrocracking reactor using a sulfided hydrocracking catalyst; the other part of the liquid phase is mixed with hydrocracking tail oil, and the mixture is fed into a hydroisomerization cracking reactor using a sulfurized hydroisomerization cracking catalyst; and an obtained hydrocracking reaction material and anobtained hydroisomerization cracking reaction material are subjected to gas-liquid separation and fractionation separately to obtain naphtha, aviation kerosene, diesel oil and tail oil products with different specifications. The invention provides the two-stage hydrocracking process for simultaneously producing more than two different-specification light naphtha, heavy naphtha, aviation kerosene,diesel oil and tail oil products on a set of hydrogenation process equipment for the first time.

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 Applications(China)
IPC IPC(8): C10G67/00
CPCC10G67/00
Inventor 刘涛白振民李宝忠王晶晶吴锐崔哲
Owner CHINA PETROLEUM & CHEM CORP
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