A hydrocracking process for flexibly producing diesel oil
A technology of hydrocracking and hydroisomerization cracking, applied in hydrotreating process, petroleum industry, treatment of hydrocarbon oil, etc., can solve problems such as poor operation flexibility, reduce freezing point, increase viscosity index, freezing point low effect
Active Publication Date: 2019-07-09
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
Therefore, when using the above hydrocracking processes alone, you can only choose different types of hydrocracking catalysts according to your needs, or use two molecular sieve composite catalysts, or use two kinds of hydrocracking catalysts in grades, but these processes only It can produce tail oil products of one nature, that is, the operation flexibility is relatively poor
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Embodiment 1-3
[0044] 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.
[0045] Table 1 Main properties of wax oil feedstock
[0046]
[0047] Table 2 Process conditions
[0048]
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The invention discloses a hydrocracking process for flexibly producing diesel oil. A wax oil raw material is subjected to hydrogenation pretreatment and then enters a hydrocracking reactor, and a hydrocracked material passing through a hydrocracking catalyst bed layer is divided into two streams; one stream of the hydrocracked material is subjected to gas-liquid separation and fractionation to obtain naphtha, aviation kerosene, diesel oil and tail oil; and the other stream of the hydrocracked material is mixed with a part or all of hydrocracking tail oil, and the mixture is fed into a hydrogenation isomerization cracking reactor and subjected to isomerization cracking; and a hydrogenation isomerization cracking product is subjected to gas-liquid separation and fractionation to obtain naphtha, aviation kerosene, diesel oil and tail oil. The invention provides the process for simultaneously producing more than two types of aviation kerosene, diesel oil and tail oil products with different specifications on one set of hydrogenation process equipment, especially diesel oil products with different condensation points, heat carried by a part of cracked materials can be fully utilized, and coupling operation of the hydrocracking reactor and the hydrogenation isomerization cracking reactor can be realized.
Description
technical field [0001] The invention belongs to the field of petroleum refining, and in particular relates to a hydrocracking process for flexibly producing high-quality naphtha, jet fuel, diesel oil and tail oil products of different properties from wax oil. 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. Hydrocracking ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C10G67/02
CPCC10G67/02C10G2300/202C10G2300/302C10G2300/304C10G2400/04C10G2400/10
Inventor 张学辉刘涛李宝忠王仲义吴长安关明华
Owner CHINA PETROLEUM & CHEM CORP
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