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Method for selective hydrogenation of diesel oil

A selectivity and diesel technology, applied in hydrotreating process, chemical instruments and methods, hydrocarbon oil treatment, etc., can solve the problem of poor selectivity of single-ring aromatic hydrocarbons, improve activity and stability, improve activity, and increase service life Effect

Active Publication Date: 2018-10-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is the poor selectivity of single-ring aromatics in the conventional hydrorefining process of high-aromatic diesel feedstock

Method used

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  • Method for selective hydrogenation of diesel oil
  • Method for selective hydrogenation of diesel oil
  • Method for selective hydrogenation of diesel oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] use figure 1 The flow shown is for feed oil D. The feed oil D mixed with hydrogen enters the first reaction zone and contacts with the hydrorefining catalyst A. The polycyclic aromatic hydrocarbon saturation rate of the liquid material in the reaction effluent of the first reaction zone is 70%, and the monocyclic aromatic hydrocarbon selectivity is 98.3%. The reaction effluent in the first reaction zone is separated in a separator to obtain reaction effluent I and reaction effluent II. The temperature of the separator is 260° C., and the mass ratio of reaction effluent I to reaction effluent II is 60:40. The reaction effluent II is mixed with hydrogen and enters the second reaction zone, contacts with the hydrofinishing catalyst A, and further undergoes the hydrofinishing reaction to obtain the reaction effluent III, which is mixed with the reaction effluent I and separated to obtain hydrogenation Oil is produced. The hydrogenation reaction conditions of the two reac...

Embodiment 2

[0088] use figure 1 The process shown treats feed oil D. The feed oil D mixed with hydrogen enters the first reaction zone and contacts with the hydrorefining catalyst C. The saturation rate of polycyclic aromatic hydrocarbons in the liquid material in the reaction effluent of the first reaction zone is 65%, and the selectivity of monocyclic aromatic hydrocarbons is 100%. The reaction effluent in the first reaction zone is separated in a separator to obtain reaction effluent I and reaction effluent II. The temperature of the separator is 250° C., and the mass ratio of reaction effluent I to reaction effluent II is 50:50. The reaction effluent II is mixed with hydrogen and enters the second reaction zone, contacts with the hydrofinishing catalyst C, and further undergoes the hydrofinishing reaction to obtain the reaction effluent III, which is mixed with the reaction effluent I and separated to obtain hydrogenation Oil is produced. The hydrogenation reaction conditions of th...

Embodiment 3

[0091] use figure 1 The flow shown is for feed oil D. The feed oil D mixed with hydrogen enters the first reaction zone and contacts with the hydrorefining catalyst C. The polycyclic aromatic hydrocarbon saturation rate of the liquid material in the reaction effluent of the first reaction zone is 68%, and the monocyclic aromatic hydrocarbon selectivity is 100%. The reaction effluent in the first reaction zone is separated in a separator to obtain reaction effluent I and reaction effluent II. The temperature of the separator is 260° C., and the mass ratio of reaction effluent I to reaction effluent II is 60:40. The reaction effluent II is mixed with hydrogen and enters the second reaction zone, contacts with the hydrofinishing catalyst C, and further undergoes the hydrofinishing reaction to obtain the reaction effluent III, which is mixed with the reaction effluent I and separated to obtain hydrogenation Oil is produced. The hydrogenation reaction conditions of the two react...

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PUM

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Abstract

The invention relates to a method for selective hydrogenation of diesel oil. The method comprises that diesel oil raw material oil and hydrogen are mixed, the mixture contacts a hydrorefining catalystin a first reaction zone, and hydrodesulfurization, hydrodenitrogenation and selective hydrodearomatization are performed under hydrogenation process conditions; the reaction effluent of the first reaction zone is separated by a separator to obtain a reaction effluent I and reaction effluent II, the reaction effluent II enters a second reaction zone and contacts a hydrorefining catalyst, and hydrodesulfurization, hydrodenitrogenation and selective hydrodearomatization are further performed under hydrogenation process conditions to obtain a reaction effluent III; after the reaction effluent Iand the reaction effluent III are mixed, and separation is performed to obtain hydrogenation oil; and based on the diesel oil raw material oil, the saturation rate of the polycyclic aromatic hydrocarbon in the hydrogenation oil is more than 95%, and the selectivity of the monocyclic aromatic hydrocarbon is more than 85%. According to the present invention, with the method, the high-quality raw material is provided for the catalytic cracking or hydrocracking production of high-octane number gasoline or BTX components while the hydrogen consumption of the hydrogenation process is reduced, and the process economy is easily improved.

Description

technical field [0001] The invention relates to a method for refining hydrocarbon oil in the presence of hydrogen, more specifically, a method for selectively hydrogenating diesel oil. Background technique [0002] Catalytic cracking diesel has a relatively high proportion in my country's diesel products, accounting for about 1 / 3 of commercial diesel. As crude oil becomes worse and heavier, the quality of FCC diesel fractions is deteriorating day by day, mainly manifested by high content of sulfur, nitrogen and aromatics, low cetane number and poor stability. In recent years, with the wide application of high-severity catalytic cracking technology such as catalytic cracking technology (MIP) that produces more isoparaffins, the content of aromatics, especially polycyclic aromatics, in MIP catalytic diesel has further increased, and the cetane number has further decreased . With the continuous enhancement of environmental protection awareness, the country's clean quality req...

Claims

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Application Information

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IPC IPC(8): C10G67/02B01J23/888
CPCB01J23/002B01J23/888B01J2523/00C10G67/02C10G2300/1055C10G2300/1059C10G2300/202B01J2523/41B01J2523/69B01J2523/847
Inventor 习远兵鞠雪艳王哲张乐戴立顺杨平唐津莲
Owner CHINA PETROLEUM & CHEM CORP
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