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Method for producing hydrocarbon raw material rich in monocyclic aromatic hydrocarbons

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

Active Publication Date: 2018-05-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 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 hydrocarbon raw material rich in monocyclic aromatic hydrocarbons
  • Method for producing hydrocarbon raw material rich in monocyclic aromatic hydrocarbons
  • Method for producing hydrocarbon raw material rich in monocyclic aromatic hydrocarbons

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] use figure 1 The flow shown is for feed oil D. The feed oil D is mixed with hydrogen and enters the first reaction zone and the second reaction zone in turn, and reacts with the hydrotreating catalyst A. The weight ratio of the feed oil D to the recycled product is 8:1. 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 polycyclic aromatic hydrocarbons in the liquid stream is 85.29%, the saturation rate of total aromatic hydrocarbons is 11.40%, and the saturation rate of monocyclic aromatic hydrocarbons is 11.40%. The selectivity is 80.17%.

[0089] Compared with Comparative Example 2, it can be seen that under the equivalent saturation rate of polycyclic aromatic hydrocarbons, the product monocyclic aromatics obtained by the present invention has higher selectivity and lower hydrogen consumption, which shows that the present invention can be used for catal...

Embodiment 2

[0091] use figure 1 The flow shown is for feed oil D. The feed oil D is mixed with hydrogen and enters the first reaction zone and the second reaction zone in turn, and reacts with the hydrotreating catalyst C. The weight ratio of the feed oil D to the recycled product is 8:1. 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 polycyclic aromatic hydrocarbons in the liquid stream is 85.11%, the saturation rate of total aromatic hydrocarbons is 11.15%, and the saturation rate of monocyclic aromatic hydrocarbons is 11.15%. The selectivity is 80.56%.

Embodiment 3

[0093] use figure 1 The flow shown is for feed oil D. The raw oil D is mixed with hydrogen and enters the first reaction zone and the second reaction zone in turn, and reacts with the hydrotreating catalyst C. The weight ratio of the raw oil D to the recycled product is 1:1. 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 polycyclic aromatic hydrocarbons in the liquid stream is 88.05%, the saturation rate of total aromatic hydrocarbons is 10.78%, and the saturation rate of monocyclic aromatic hydrocarbons is 10.78%. The selectivity is 81.84%.

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Abstract

The invention relates to a method for producing a hydrocarbon raw material rich in monocyclic aromatic hydrocarbons. According to the method, hydrogen and raw oil of diesel oil are mixed and then successively enter a first reaction zone and a second reaction zone for a contact reaction with a hydrorefining catalyst; an effluent of the second reaction zone is separated so as to obtain a liquid material flow and a gas material flow; a part of the liquid material flow is used as a circulation product and returns to the inlet of the second reaction zone; and the rest part of the liquid material flow is used as a hydrocarbon raw material and enters a catalytic cracking unit and / or hydrocracking unit. The method provided by the invention provides a high-quality raw material for producing high-octane-number gasoline or BTX component through catalytic cracking or hydrocracking, reduces hydrogen consumption in hydrogenation and is beneficial for improving the economical efficiency of hydrogenation.

Description

technical field [0001] The invention relates to a method for refining hydrocarbon oil in the presence of hydrogen, more specifically, a method for producing hydrocarbon raw materials rich in single-ring aromatic hydrocarbons. 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 a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/08
CPCC10G65/08C10G2300/1037C10G2300/70
Inventor 习远兵鞠雪艳王哲戴立顺张乐李明丰龚剑洪
Owner CHINA PETROLEUM & CHEM CORP
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