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A method for catalytic hydrogenation conversion of diesel oil containing aromatics

A technology for hydroconversion and catalytic hydrogenation, which is applied in the treatment of hydrocarbon oil, hydrocarbon oil treatment products, and hydrotreating processes, etc., can solve the problems of low octane number of gasoline products, ensure long-term operation and reduce excessive Saturation, the effect of raising the reaction temperature

Active Publication Date: 2019-04-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] US4971680 discloses a method of using a hydrocracking catalyst to selectively crack aromatics in diesel oil, especially bicyclic aromatics, into gasoline components, but the gasoline product has a low octane number and still needs further treatment

Method used

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  • A method for catalytic hydrogenation conversion of diesel oil containing aromatics
  • A method for catalytic hydrogenation conversion of diesel oil containing aromatics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] use figure 1 process shown. There are three reactors, R1 is a hydrogenation pretreatment reactor, R2 and R3 are hydrogenation conversion reactors. R1 is filled with catalyst A, R2 is filled with catalyst B, and R3 is filled with catalyst B. In the initial stage of operation, R2 is short-circuited, FCC diesel and hydrogen are mixed into R1, and the effluent is obtained into R3 to obtain products, which are separated and fractionated to obtain gas, gasoline products and diesel products. After 5,500 hours of operation, the process is changed, and R2 is cut into the process flow: FCC diesel is mixed with hydrogen and enters R1, the obtained effluent enters R2, and the obtained effluent enters R3, and the obtained products are separated and fractionated to obtain gas, gasoline products and diesel products. Process conditions and product properties are shown in Table 3.

Embodiment 2

[0044] use figure 1 process shown. There are three reactors, R1 is a hydrogenation pretreatment reactor, R2 and R3 are hydrogenation conversion reactors. R1 is filled with catalyst A, and R2 and R3 are filled with catalyst B. At the initial stage of operation, R2 is short-circuited, raw material oil and hydrogen are mixed into R1, and the effluent is obtained into R3 to obtain products, which are separated and fractionated to obtain gas, gasoline products and diesel products. After 5,500 hours of operation, the process is changed, and R2 is cut into the process flow: the raw material oil is mixed with hydrogen and enters R1, the obtained effluent enters R2, and the obtained effluent enters R3, and the obtained products are separated and fractionated to obtain gas, gasoline products and diesel products. Process conditions and product properties are shown in Table 5.

Embodiment 3

[0046] use figure 1 process shown. There are three reactors, R1 is a hydrogenation pretreatment reactor, R2 and R3 are hydrogenation conversion reactors. R1 is filled with catalyst A, R2 is filled with catalyst C, and R3 is filled with catalyst B. In the early stage of operation, R2 is short-circuited, raw material oil and hydrogen are mixed into R1, and the effluent is obtained into R3 to obtain products, which are separated and fractionated to obtain gas, gasoline products and diesel products. After 5,500 hours of operation, the process is changed, and R2 is cut into the process flow: the raw material oil is mixed with hydrogen and enters R1, the obtained effluent enters R2, and the obtained effluent enters R3, and the obtained products are separated and fractionated to obtain gas, gasoline products and diesel products. Process conditions and product properties are shown in Table 6.

[0047] Table 3 process conditions and product properties

[0048] running time...

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Abstract

The present invention discloses a hydrogenation conversion method of aromatic hydrocarbon-containing diesel oil. According to the present invention, an aromatic hydrocarbon-containing diesel oil distillate is subjected to a hydrorefining reaction at a hydrogenation pretreatment section, and then is subjected to a hydroconversion reaction at a hydroconversion section, wherein the hydroconversion section comprises at least two hydroconversion zones; the method further comprises that (a) only the second hydroconversion zone is used in the step, the first hydroconversion zone is subjected to short circuit, and the time is less than the deactivation time of the hydrorefining section, and (b) all the hydroconversion zones are used in the step, and the first hydroconversion zone being subjected to short circuit is connected in front of the second hydroconversion zone used in the step a) in series and on rear of the hydrorefining section; and with the method of the present invention, the stable operation starting time of the device at the startup initial stage is shortened, and the operating period of the device is effectively prolonged.

Description

technical field [0001] The invention relates to a method for catalytic hydrogenation conversion of aromatics-containing diesel oil, in particular to a method for producing high-octane gasoline components by catalytic hydrogenation conversion of aromatics-containing diesel oil. technical background [0002] Catalytic cracking (FCC) technology is one of the main technological means of lightening heavy oil, and it occupies a relatively important position in oil refining enterprises in all countries in the world. In recent years, the quality of catalytic cracking products, especially catalytic cracking light cycle oil (LCO), has worsened with the increasingly heavy and inferior quality of raw materials processed by catalytic cracking units. FCC light cycle oil has high sulfur content and aromatics content, and poor engine ignition performance. It is mainly used for blending fuel oil, non-vehicle diesel oil and heating oil abroad. [0003] At present, foreign countries have used...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02
CPCC10G67/02C10G2300/1037C10G2300/1055C10G2300/1059C10G2300/20C10G2300/70C10G2400/02C10G2400/04
Inventor 孙士可李本哲陈光孙洪江孙薇
Owner CHINA PETROLEUM & CHEM CORP
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