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Extraction method of direct coal liquefaction residues and application of extracts

A technology for direct coal liquefaction and coal liquefaction residue, which is applied in the field of deep coal processing, can solve the problems of difficulty in fully, reasonably and efficiently utilizing coal liquefaction heavy liquefied oil, etc., and achieves improved overall oil yield, low cost and low cost. The effect of quinoline insolubles

Active Publication Date: 2011-02-02
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to achieve the purpose of fully, rationally and efficiently utilizing coal to liquefy heavy liquefied oil

Method used

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  • Extraction method of direct coal liquefaction residues and application of extracts
  • Extraction method of direct coal liquefaction residues and application of extracts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Add 100kg of coal direct liquefaction residue and 500Kg of the first extraction solvent (distillation range 2 The gas was heated to 1.0MPa, the temperature was raised to 100°C, and the mixture was obtained after stirring at a stirring speed of 100r / min for 30 minutes. Then, pressurized hot filtration is performed to obtain the extract mixture S1, which is sent to the atmospheric distillation tower, cuts the fraction -1 , Gas-liquid ratio 850m 3 / t, the hydrogenation catalyst is Ni-W / γ-Al 2 O 3 , The difference in aromatic carbon ratio before and after hydrogenation is 0.06, which meets the requirements of the direct coal liquefaction process for circulating solvents.

[0066] The solid matter obtained by the primary extraction and 250Kg of the second extraction solvent (distillation range of 220-260°C) are added to the stirred tank, and then they are thoroughly mixed. Charge N 2 The gas was heated to 1.5MPa, the temperature was raised to 150°C, and the mixture was obtained ...

Embodiment 2

[0068] Add 50kg of coal direct liquefaction residue and 300Kg of the first extraction solvent (distillation range 2 The gas was heated to 1.0MPa, the temperature was raised to 150°C, and the mixture was obtained after stirring at a stirring speed of 150r / min for 20 minutes. Then centrifugal separation is performed to obtain the extract mixture S1, which is sent to the atmospheric distillation tower, cuts the fraction -1 , Gas-liquid ratio 800m 3 / t, the hydrogenation catalyst is Co-Mo / γ-Al 2 O 3 , The difference in aromatic carbon ratio before and after hydrogenation is 0.05, which meets the requirements of the direct coal liquefaction process for circulating solvents.

[0069] The solid matter obtained by the first-stage extraction and 200Kg of the second extraction solvent (distillation range of 220-260°C) are added to the stirred tank, and then they are thoroughly mixed. Charge N 2 The gas was heated to 1.0MPa, the temperature was raised to 130°C, and the mixture was obtained a...

Embodiment 3

[0071] Add 100kg of coal direct liquefaction residue and 300Kg of the first extraction solvent (distillation range 2 The gas was heated to 2.0MPa, the temperature was raised to 60°C, and the mixture was obtained after stirring at a stirring speed of 200r / min for 100 minutes. Then, pressurized hot filtration is performed to obtain the extract mixture S1, which is sent to the atmospheric distillation tower, cuts the fraction -1 , Gas-liquid ratio 1000m 3 / t, the hydrogenation catalyst is Ni-Co-W / SiO 2 , The difference in aromatic carbon ratio before and after hydrogenation is 0.07, which meets the requirements of the direct coal liquefaction process for circulating solvents.

[0072] The solid matter obtained by the first-stage extraction and 210Kg of the second extraction solvent (distillation range of 220-260°C) are added to the stirred tank and mixed thoroughly. Charge H 2 The gas was heated to 0.5MPa, the temperature was raised to 250°C, and the mixture was obtained after stirri...

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Abstract

The invention relates to an extraction method of direct coal liquefaction residues and application of extracts. The extraction method comprises the following steps: a) adding coal liquefaction residue powder and a first extraction solvent to a stirred tank to undergo primary extraction; b) carrying out solid-liquid separation on the extracted mixture obtained in the step a), recovering the first extraction solvent from the obtained liquid in a solvent recovery unit and recycling the first extraction solvent, obtaining heavy liquefied oil after recovering the first solvent, carrying out moderate hydrogenation on the heavy liquefied oil and other recycled solvents in a coal liquefaction solvent hydrogenation unit and using the product as the recycled solvent in the coal liquefaction process; c) mixing solid obtained through solid-liquid separation of extracts obtained after primary extraction with a second extraction solvent to undergo secondary extraction; d) carrying out solid-liquid separation on the extracted mixture obtained after secondary extraction, obtaining asphaltic substances after recovering the second solvent from the obtained liquid in the solvent recovery unit and carrying out heat treatment on the asphaltic substances by heating and carbonizing to obtain mesophase asphalt and oils.

Description

Technical field [0001] The invention relates to the field of deep processing of coal, in particular to an extraction method of coal direct liquefaction residue and the application of the extract. Background technique [0002] Direct coal liquefaction is an advanced clean coal technology that converts coal directly into clean transportation liquid fuels (naphtha, diesel, etc.) or chemical raw materials through hydrogenation under the action of a catalyst under high temperature and high pressure. It is an advanced clean coal technology that relieves my country’s petroleum resources One of the important ways of shortage and tight supply and demand of petroleum products. The main target product of the direct coal liquefaction process is liquefied oil, and by-produces some hydrocarbon gases, COx and other gases, process water, and liquefaction residues (also called coal liquefaction residues) produced during the solid-liquid separation process. The liquefaction residue generally accou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/145C10G1/00C10C3/08C10C3/00C01B31/02C10G67/00
Inventor 吴秀章张胜振李克健舒歌平李丽
Owner CHNA ENERGY INVESTMENT CORP LTD
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