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 problems such as poor operational flexibility
Active Publication Date: 2021-07-09
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
Method used
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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
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[0048] Table 2 Example process conditions
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[0050] Continued Table 2 Process Conditions
[0051]
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Abstract
The invention discloses a flexible two-stage hydrocracking process. The wax oil raw material enters the separation system after hydrogenation pretreatment, and the obtained impurity-free liquid phase enters the hydrocracking reactor containing the reduced hydrocracking catalyst, and the first hydrocracking material is divided into two streams; one stream of material is passed through The hydrocracking reactor is extracted from the middle of the bed, and enters the isomerization cracking reactor containing the reduced hydroisomerization cracking catalyst for reaction; another stream of material continues to flow through the lower hydrocracking catalyst bed; the resulting hydrocracking The reaction material and the hydroisomerization cracking reaction material are subjected to gas-liquid separation and fractionation respectively to obtain distillate oil and tail oil products of different specifications. The present invention provides for the first time a hydrocracking process for simultaneously producing distillate oil and tail oil products of two or more different specifications on a set of hydrogenation equipment, which can make full use of the heat carried by part of the cracked materials to realize the hydrocracking reactor Coupling operation with hydroisomerization cracking reactor.
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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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