Coal direct hydrogenation liquefaction method rich in aromatics

A technology for hydroliquefaction and hydrocracking, which is applied in the preparation of liquid hydrocarbon mixture, hydrotreating process, and treatment of hydrocarbon oil, etc., can solve the problems of low energy utilization efficiency, underutilization, long process route, etc. Competitiveness, high aromatic potential, and the effect of increasing economy

Active Publication Date: 2020-12-18
CCTEG CHINA COAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Existing coal-to-aromatics patents, such as CN106268924, CN101422743, CN1880288, CN1869159, CN103074097 and CN101892078, etc., all use coal as raw material, and first generate synthesis gas (CO+H 2 ) and then direct / indirect conversion to aromatics, the process route is long, and the macromolecular coal is directly converted into small molecular synthesis gas. Low utilization efficiency
[0006] Although the patent CN104004542 relates to coal-based aromatics production technology, it only uses the oil produced in the traditional coal direct liquefaction process as raw material, and the yield of raw material oil with high aromatics potential content is only about 15%, which has a low yield and does not involve the direct coal liquefaction process Systems and methods for regulating rich aromatics production

Method used

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  • Coal direct hydrogenation liquefaction method rich in aromatics
  • Coal direct hydrogenation liquefaction method rich in aromatics
  • Coal direct hydrogenation liquefaction method rich in aromatics

Examples

Experimental program
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Effect test

Embodiment 1

[0080] Such as figure 1 As shown, an embodiment of the present invention proposes a method for directly hydrogenating liquefaction of coal rich in aromatics, which includes:

[0081] The fresh hydrogen 1 is mixed with the circulating hydrogen 7 to obtain the mixed hydrogen 6; the raw coal 3 is pretreated, dried and broken into coal powder, and the external solvent 2, catalyst and co-catalyst 4, and circulating solvent 5 are added to the coal slurry preparation unit V1 in a certain proportion , stir and mix in V1 to form an oil-coal slurry with a viscosity lower than 500cp (60°C). The oil-coal slurry from V1 is pressurized by the high-pressure coal slurry pump P1 and mixed with the mixed hydrogen 6. After mixing, it is preheated by the preheater F1. The preheated oil-coal slurry enters the liquefaction reactor R1, and the The reaction product is sent to the gas-liquid separator V2 for gas-liquid separation. A part of the gas phase material in the separator V2 is mixed with fre...

Embodiment 2

[0087] An embodiment of the present invention proposes a method for directly hydrogenating liquefaction of coal rich in aromatics, which includes:

[0088] The fresh hydrogen 1 is mixed with the circulating hydrogen 7 to obtain the mixed hydrogen 6; the raw coal 3 is pretreated, dried and broken into coal powder, and the external solvent 2, catalyst and co-catalyst 4, and circulating solvent 5 are added to the coal slurry preparation unit V1 in a certain proportion , stir and mix in V1 to form an oil-coal slurry with a viscosity lower than 500cp (60°C). The oil-coal slurry from V1 is pressurized by the high-pressure coal slurry pump P1 and mixed with the mixed hydrogen 6. After mixing, it is preheated by the preheater F1. The preheated oil-coal slurry enters the liquefaction reactor R1, and the The reaction product is sent to the gas-liquid separator V2 for gas-liquid separation. A part of the gas phase material in the separator V2 is mixed with fresh hydrogen and recycled, an...

Embodiment 3

[0094] An embodiment of the present invention proposes a method for directly hydrogenating liquefaction of coal rich in aromatics, which includes:

[0095]The fresh hydrogen 1 is mixed with the circulating hydrogen 7 to obtain the mixed hydrogen 6; the raw coal 3 is pretreated, dried and broken into coal powder, and the external solvent 2, catalyst and co-catalyst 4, and circulating solvent 5 are added to the coal slurry preparation unit V1 in a certain proportion , stir and mix in V1 to form an oil-coal slurry with a viscosity lower than 500cp (60°C). The oil-coal slurry from V1 is pressurized by the high-pressure coal slurry pump P1 and mixed with the mixed hydrogen 6. After mixing, it is preheated by the preheater F1. The preheated oil-coal slurry enters the liquefaction reactor R1, and the The reaction product is sent to the gas-liquid separator V2 for gas-liquid separation. A part of the gas phase material in the separator V2 is mixed with fresh hydrogen and recycled, and...

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Abstract

The invention discloses a method for directly performing hydrogenation liquefaction on coals to richly produce aromatic hydrocarbon. The method comprises the following steps of preparing coal oil mixture; performing deep hydrogenation liquefaction; performing atmospheric-vacuum distillation to obtain naphtha; and performing catalytic reforming on the naphtha to obtain a light aromatic hydrocarbonproduct. In the method, by coupling technologies of coal direct liquefaction and catalytic reforming as well as hydrogen cracking, through diesel oil fraction and secondary hydrogen cracking, the purpose that high-additional value light aromatic hydrocarbon is produced to the maximum with coal direct liquefaction is achieved. The method is high in coal conversion ratio, yield of the obtained naphtha with high aromatic hydrocarbon potential content, aromatic potential value, yield of the obtained mixed aromatic hydrocarbon product and content of light aromatic hydrocarbon.

Description

technical field [0001] The invention relates to the technical field of coal clean utilization, in particular to a method for directly hydrogenating liquefaction of coal to produce rich aromatics. Background technique [0002] Aromatics (BTX) is a bulk basic organic chemical raw material, widely used in fields such as rubber, resin, textile, chemical fiber and plastic. Especially with the rapid development of the aromatics industry chain mainly based on PX-purified terephthalic acid (PTA)-polyester (PET)-polyester fiber (polyester), polyester plastic (polyester film, polyester packaging bottle) , as the raw material for the production of aromatics, petroleum resources are facing increasingly severe shortages, and have become one of the main bottlenecks restricting the development of aromatics in my country. [0003] At present, the annual consumption of aromatics in my country exceeds 20 million tons, and the dependence on paraxylene (PX) in 2016 is as high as 56%. In indust...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02C10G1/00
CPCC10G1/002C10G1/008C10G1/065C10G67/02C10G2400/30
Inventor 毛学锋胡发亭赵鹏李军芳钟金龙张晓静李伟林谷小会朱肖曼王光耀黄澎陈来夫马博文石智杰常秋连
Owner CCTEG CHINA COAL RES INST
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