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A method for producing gasoline by hydrogenation conversion of aromatics-containing diesel fraction

A hydrogenation conversion and diesel oil technology, which is applied in the direction of hydrocarbon oil treatment products, hydrocarbon oil treatment, hydrotreatment process, etc., can solve the problems of fast catalyst deactivation rate, low octane number of gasoline products, short operation cycle, etc., to achieve The effect of reducing oversaturation, accelerating the rate of inactivation, and extending the operating cycle

Active Publication Date: 2021-10-08
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0008] At present, the hydrocracking of aromatics-containing diesel oil to produce gasoline is common in the initial stage of production. Due to the high hydrogenation activity of the catalyst, the aromatics are over-hydrogenated and saturated, resulting in a low octane number of gasoline products.
And the catalyst deactivation rate is too fast during the operation, resulting in short operation cycle and other problems

Method used

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  • A method for producing gasoline by hydrogenation conversion of aromatics-containing diesel fraction
  • A method for producing gasoline by hydrogenation conversion of aromatics-containing diesel fraction
  • A method for producing gasoline by hydrogenation conversion of aromatics-containing diesel fraction

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Embodiment 1

[0045] use figure 1 process shown. There are two reactors, R1 is a hydrogenation pretreatment reactor, and R2 is a hydrogenation conversion reactor. R1 is filled with catalyst A, and R2 is filled with catalyst B. The volume space velocity of the refining reactor is 1.5h -1 , the conversion reactor volume space velocity is 1.5h -1 , the maximum operating pressure of the device is 10.0 MPa, the maximum operating temperature is 405°C, the maximum operating total temperature rise is 100°C, the design conversion rate is >40 wt%, and the octane number of the gasoline product research method is ≮90.

[0046] The methods include:

[0047] (1) In the initial stage of operation, the reaction pressure is 6.3MPa, and the initial reaction temperature is 381°C; gradually increase the reaction temperature of the reforming reactor so that the total bed temperature rise reaches the operating upper limit of 100°C, and the octane number of gasoline products reaches the standard after 520 hou...

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Abstract

The invention discloses a method for producing gasoline by hydrogenation conversion of diesel oil containing aromatics. The method includes the following: a) a step, the reaction pressure is lower than the maximum operating pressure, the reaction temperature of the conversion reactor is increased, and the single bed temperature rise of the conversion reactor or the total bed temperature rise reaches the maximum operating temperature rise until the gasoline The component quality reaches the standard; b) one step, gradually increase the reaction pressure, and at the same time increase the reaction temperature of the conversion reactor, and keep the conversion rate of the conversion reactor not lower than the design value; c) one step, keep the reaction temperature of the conversion reactor unchanged , only increase the reaction pressure until the reaction pressure reaches the design pressure or the conversion rate is lower than the design value. The method of the invention can accelerate the deactivation rate of the catalyst at the initial stage of operation, shorten the time for stable adjustment of operation, and can also prolong the operation period of the device at the same time.

Description

technical field [0001] The invention relates to a method for hydrogenation conversion of aromatics-containing diesel oil, in particular to a method for producing high-octane gasoline components by hydrogenation conversion of aromatics-containing diesel oil. [0002] technical background [0003] Due to the high content of aromatics in catalytic diesel, it has high density and low cetane number. It is the worst diesel blending component and the most difficult diesel component in quality upgrading. The content of aromatic hydrocarbons is as high as 60%, among which polycyclic aromatic hydrocarbons account for more than 50% of the total aromatic hydrocarbons. For the diesel fraction, rich aromatics are unfavorable, but for the naphtha fraction, the naphtha fraction with high aromatic content can be used as a high-octane gasoline blending component, which can effectively utilize the rich aromatics in the catalytic diesel Aromatics produce high value-added naphtha products. [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02
CPCC10G67/02C10G2300/70C10G2400/02C10G2400/04
Inventor 孙士可彭冲庞宏曹正凯
Owner CHINA PETROLEUM & CHEM CORP
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