Hydrocracking method

A hydrocracking and hydropretreatment technology, applied in hydrotreating process, treatment of hydrocarbon oil, petroleum industry, etc., can solve problems such as poor product quality and inability to operate for a long time, reduce low temperature performance and reduce equipment investment and operational risk, the effect of increased temperature

Active Publication Date: 2022-05-06
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the two-stage hydrocracking process is more complicated, compared with the one-stage hydrocracking process where the refined material directly enters the hydrocracking process, it cannot be operated for a long period of time and the product quality is poor. The two-stage hydrocracking is still the current processing page. The leading process of rock oil

Method used

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Embodiment Construction

[0035] The action and effect of the present invention are further illustrated below through the examples, but the following examples do not constitute a limitation to the method of the present invention, and % are mass percentages in the application unless otherwise specified.

[0036] The protective agent used in the hydrocracking pretreatment reaction zone in the embodiments of the present invention and comparative examples is FDM-21, the hydrofinishing catalyst is FF-33, the protective agent used in the hydrofinishing reaction zone is FDM-21, and the hydrofinishing catalyst is FF-33. The catalyst is FF-46, and the hydrocracking catalyst used in the hydrocracking reaction zone is FC-14, and the manufacturers of the catalysts are Sinopec Catalyst Co., Ltd.

[0037] Table 1 Catalyst Physicochemical Properties

[0038]

[0039] Table 2 Main properties of raw oil

[0040]

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Abstract

The invention discloses a hydrocracking method. The method comprises the following steps: (1) high-nitrogen raw oil and hydrogen are mixed and enter a hydrogenation pretreatment reaction zone for reaction; (2) carrying out heat exchange on the reaction effluent in the step (1) or a liquid phase separated from the reaction flow in the step (1), and then, carrying out reaction in a hydrofining reaction zone; (3) effluent of the hydrofining reaction zone in the step (2) enters a hydrocracking reaction zone for hydrocracking reaction, the outlet temperature of the hydrofining reaction zone is T1, the inlet temperature of the hydrocracking reaction zone is T2, T1-T2 = T, and T is controlled to be greater than 5 DEG C; and (4) treating the reaction effluent in the step (3) through a separator to obtain different products. The method can be used for directly processing the full-fraction shale oil, and can run for a long period to produce high-quality diesel oil and gasoline by adopting a once-through process flow.

Description

technical field [0001] The invention belongs to the field of hydrogenation technology, and relates to a hydrocracking method, in particular to a shale oil hydrocracking method. Background technique [0002] Shale oil is a liquid product obtained by heating and decomposing kerogen in oil shale. In addition to a large amount of unsaturated hydrocarbons, shale oil also contains non-hydrocarbon compounds such as sulfur, nitrogen and oxygen, and also contains relatively high levels of metals. Impurities. [0003] CN201711469253.3 discloses a flexible shale oil hydrocracking process. The shale oil raw material undergoes gas-liquid separation after hydrogenation pretreatment, and the separated liquid phase first passes through the hydrocracking pretreatment reactor, and then continues to enter the hydrocracking pretreatment reactor. In the hydrocracking reactor, the material after passing through the first hydrocracking catalyst bed is divided into two streams; one stream of mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/02
CPCC10G67/02C10G2300/4006C10G2300/4012C10G2300/4018C10G2300/70C10G2300/202
Inventor 崔哲张蕾曹正凯范思强
Owner CHINA PETROLEUM & CHEM CORP
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