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A flexible two-stage hydrocracking process

A technology of hydrocracking and hydroisomerization cracking, which is applied in the fields of hydrotreating process, petroleum industry, hydrocarbon oil treatment products, etc., and can solve the problems of poor operation flexibility and so on

Active Publication Date: 2019-07-09
CHINA PETROLEUM & CHEM CORP +1
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  • Description
  • Claims
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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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  • A flexible two-stage hydrocracking process
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  • A flexible two-stage hydrocracking process

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Embodiment 1-3

[0045] 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.

[0046] Table 1 Main properties of wax oil feedstock

[0047]

[0048] Table 2 embodiment technological conditions

[0049]

[0050] Continued Table 2 Process Conditions

[0051]

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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 then enters a separation system, an obtained liquid phase without impurities enters a hydrocracking reactor containing a reduction state hydrocracking catalyst, and an obtained first hydrocracked material is divided into two streams; one material stream is extracted out of the hydrocracking reactor through the middle of a bed layer and enters an isomerization cracking reactor containing a reduction state hydroisomerization cracking catalyst for reaction; theother material stream flows through a hydrocracking catalyst bed layer at the lower part; and an obtained hydrocracking reaction material and an obtained hydroisomerization cracking reaction materialare subjected to gas-liquid separation and fractionation separately to obtain distillate oil and tail oil products with different specifications. The invention provides the hydrocracking process forsimultaneously producing more than two distillate oil and tail oil products with different specifications on one set of hydrogenation equipment for the first time, heat carried by part of cracked materials can be fully utilized, and coupling operation of the hydrocracking reactor and the hydroisomerization cracking reactor can be realized.

Description

technical field [0001] The invention belongs to the field of petroleum refining, and in particular relates to a two-stage hydrocracking process 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 proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/00
CPCC10G67/00C10G2400/04
Inventor 张学辉刘涛李宝忠曾榕辉吴子明刘振华
Owner CHINA PETROLEUM & CHEM CORP
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