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Method for producing raw material rich in monocyclic aromatic hydrocarbons

A technology for single-ring aromatics and raw materials, which is applied in the field of raw materials rich in single-ring aromatics, can solve the problems of poor selectivity of single-ring aromatics, achieve the effects of improving activity and stability, high activity, and preventing aggregation

Active Publication Date: 2018-11-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 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 producing raw material rich in monocyclic aromatic hydrocarbons
  • Method for producing raw material rich in monocyclic aromatic hydrocarbons
  • Method for producing raw material rich in monocyclic aromatic hydrocarbons

Examples

Experimental program
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Effect test

Embodiment 1

[0089] Diesel feed oil D is cut into light diesel oil fraction and heavy diesel oil fraction, the cutting point is 250°C, the heavy diesel oil fraction is mixed with hydrogen, in the first reaction zone it contacts with hydrotreating catalyst A, and under hydrogenation reaction conditions, hydrogenation is carried out Hydrodesulfurization, hydrodenitrogenation and selective hydrodearomatization reactions; the light diesel oil fraction is mixed with the effluent from the first reaction zone and then enters the second reaction zone to contact with hydrofining catalyst B, and further proceeds under hydrogenation reaction conditions Hydrodesulfurization, hydrodenitrogenation and selective hydrodearomatization reactions, the effluent of the second reaction zone is separated to obtain whole fraction products.

[0090] The hydrogenation reaction conditions and product properties of the two reaction zones are as shown in Table 2. As can be seen from Table 2, the saturation rate of poly...

Embodiment 2

[0093] Diesel feed oil D is cut into light diesel oil fraction and heavy diesel oil fraction, the cutting point is 250°C, the heavy diesel oil fraction is mixed with hydrogen, in the first reaction zone it contacts with hydrotreating catalyst A, and under hydrogenation reaction conditions, hydrogenation is carried out Hydrodesulfurization, hydrodenitrogenation and selective hydrodearomatization reactions; the light diesel oil fraction is mixed with the effluent of the first reaction zone and then enters the second reaction zone to contact with hydrofining catalyst C, and further proceeds under the conditions of hydrogenation reaction Hydrodesulfurization, hydrodenitrogenation and selective hydrodearomatization reactions, the effluent of the second reaction zone is separated to obtain whole fraction products.

[0094] The hydrogenation reaction conditions and product properties of the two reaction zones are as shown in Table 2. As can be seen from Table 2, the saturation rate of...

Embodiment 3

[0097] Diesel feedstock oil E is cut into light diesel oil fraction and heavy diesel oil fraction. The cutting point is 255°C. The heavy diesel oil fraction is mixed with hydrogen and contacted with hydrotreating catalyst A in the first reaction zone. Under hydrogenation reaction conditions, hydrogenation is carried out Hydrodesulfurization, hydrodenitrogenation and selective hydrodearomatization reactions; the light diesel oil fraction is mixed with the effluent of the first reaction zone and then enters the second reaction zone to contact with hydrofining catalyst C, and further proceeds under the conditions of hydrogenation reaction Hydrodesulfurization, hydrodenitrogenation and selective hydrodearomatization reactions, the effluent of the second reaction zone is separated to obtain whole fraction products.

[0098] The hydrogenation reaction conditions and product properties of the two reaction zones are as shown in Table 2. As can be seen from Table 2, the saturation rate ...

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Abstract

The invention discloses a method for producing a raw material rich in monocyclic aromatic hydrocarbons. The method comprises the following steps: diesel feedstock oil is cut into a light diesel oil fraction and a heavy diesel oil fraction, the heavy diesel oil fraction is mixed with hydrogen, the mixture is in contact with a hydrorefining catalyst I in a first reaction zone, and hydrodesulfurization, hydrodenitrogenation and selective hydrodearomatization are carried out under hydrogenation reaction conditions; the light diesel oil fraction is mixed with an effluent from the first reaction zone, and then the mixture enters into a second reaction zone to be in contact with a hydrorefining catalyst II, hydrodesulfurization, hydrodenitrogenation and selective hydrodearomatization are furthercarried out under the hydrogenation reaction conditions, and the effluent from the second reaction zone is separated to obtain a whole fraction product; based on the diesel feedstock oil, polycyclic aromatic hydrocarbons in the whole fraction product have a saturation ratio of 85% to 90%, and the monocyclic aromatic hydrocarbons have a selectivity of 80% to 85%. The method provided by the invention provides high-quality raw materials for catalytic cracking or hydrocracking to produce high-octane gasoline or BTX components, reduces the hydrogen consumption in a hydrogenation process, and improves the stability of a device.

Description

technical field [0001] The invention relates to a method for refining hydrocarbon oil in the presence of hydrogen, more specifically, a method for removing polycyclic aromatic hydrocarbons in diesel fractions and producing raw materials rich in single-ring aromatic hydrocarbons. Background technique [0002] With the rapid growth of market demand for clean oil products, the catalytic cracking process in my country has developed rapidly as the main process for producing light oil products. At the same time, the output of catalytic diesel oil produced by catalytic cracking process has increased year by year, and catalytic diesel oil accounts for about half of the share of commercial diesel oil in my country. one third. However, due to heavy crude oil, the quality of catalytic diesel oil deteriorates, mainly manifested in high content of aromatics, sulfur, nitrogen, and olefins, low cetane number and poor stability, wherein the total aromatics content ranges from 50% by mass to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/00
CPCC10G67/00C10G2300/1048C10G2300/1055C10G2300/1059C10G2400/04
Inventor 鞠雪艳张乐王哲习远兵赵宁张锐丁石
Owner CHINA PETROLEUM & CHEM CORP
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