Grading preparation method of coal thermal dissolution substance

A coal-heating and hot-melting technology, applied in the field of coal chemical industry, can solve the problems of limitation, difficult coal hot-melting material classification and extraction, etc., and achieve the effect of low cost and simple process.

Inactive Publication Date: 2017-02-22
ANHUI UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

At present, most of the preparation methods of coal hot solubles are to first heat-dissolve the coal (high-temperature extraction), then obtain the coal hot-melt solution through hot filtration, and finally separate the solvent to obtain the coal hot-soluble matter. The preparation process of this method requires a specific heat Filtration device has certain restrictions on the practical application of the preparation of coal hot solubles, especially in industrial production; in addition, this method is difficult to carry out graded extraction of coal hot solubles. Two kinds of coal thermal solubles are deposited, and the chemical composition and structure of these two coal thermal solubles are quite different, which are suitable for different subsequent processing and utilization (Energy Fuels, 2015, 29, 1279-1294.)

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  • Grading preparation method of coal thermal dissolution substance

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Effect test

Embodiment 1

[0018] Take by weighing 10.0g lignite, mix with 1-methyl naphthalene solvent according to solvent volume (ml) / coal mass (g) ratio of 15, place 200mL autoclave, use 99.99%N 2 After replacing the air in the autoclave, heat-melt treatment at 360°C and 600r / min for 2h at constant temperature. Cool to room temperature, centrifuge the thermally dissolved coal-organic solvent mixture product to obtain solid residue 1 and organic solution 1, solid residue 1 is washed successively with 1-methylnaphthalene and n-hexane to obtain solid residue 2 and washing liquid, collect the organic solution 1 and the washing liquid, and reclaim the solvent by distillation under reduced pressure, and the solid product obtained is room temperature soluble coal hot-soluble matter, represented by coal hot-soluble matter 1; Amide (DMF) was washed, the organic solution 2 was collected, and the solvent was recovered by distillation under reduced pressure. The solid product obtained was a room temperature dep...

Embodiment 2

[0020] Take by weighing 5.0g lignite, mix with 1-methylnaphthalene solvent at 30 by solvent volume (ml) / coal mass (g) ratio, place 200mL autoclave, use 99.99%N 2 After the air in the autoclave was replaced, it was subjected to constant-temperature heat-melting treatment at 360°C and 600r / min for 3h. Cool to room temperature, centrifuge the thermally dissolved coal-organic solvent mixture product to obtain solid residue 1 and organic solution 1, solid residue 1 is washed successively with 1-methylnaphthalene and n-hexane to obtain solid residue 2 and washing liquid, collect the organic solution 1 and the washing liquid, and reclaim the solvent by distillation under reduced pressure, and the solid product obtained is room temperature soluble coal hot-soluble matter, represented by coal hot-soluble matter 1; Amide (DMF) was washed, the organic solution 2 was collected, and the solvent was recovered by distillation under reduced pressure. The solid product obtained was a room temp...

Embodiment 3

[0022] Take by weighing 2.5g lignite, mix with 1-methylnaphthalene solvent as 60 by solvent volume (ml) / coal mass (g) ratio, place 200mL autoclave, use 99.99%N 2 After the air in the autoclave was replaced, it was subjected to constant-temperature heat-dissolution treatment at 360°C and 600r / min for 4 hours. Cool to room temperature, centrifuge the thermally dissolved coal-organic solvent mixture product to obtain solid residue 1 and organic solution 1, solid residue 1 is washed successively with 1-methylnaphthalene and n-hexane to obtain solid residue 2 and washing liquid, collect the organic solution 1 and the washing liquid, and reclaim the solvent by distillation under reduced pressure, and the solid product obtained is room temperature soluble coal hot-soluble matter, represented by coal hot-soluble matter 1; Amide (DMF) was washed, the organic solution 2 was collected, and the solvent was recovered by distillation under reduced pressure. The solid product obtained was a ...

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Abstract

The invention provides a grading preparation method of a coal thermal dissolution substance and belongs to the field of coal chemical industry. The preparation method comprises specific steps as follows: coal and an organic solvent are mixed, a mixture is subjected to thermal dissolution treatment at the temperature of 360 DEG C in the atmosphere of inert gas, the coal and organic solvent mixture after the thermal dissolution treatment is centrifuged at the room temperature and washed with a thermal dissolution solvent, the organic solvent in a centrifugal washing solution is separated and recovered, and the coal thermal dissolution substance which is soluble at the room temperature is obtained; solid residues are subjected to centrifugal washing again with an N,N-dimethylformamide solvent at the room temperature, and the coal thermal dissolution substance deposited at the room temperature is obtained. The grading preparation method of the coal thermal dissolution substance realizes grading preparation of the coal thermal dissolution substance, requires no specific hot-filtration separation processing equipment in a preparation process, adopts a simple technology, and is lower in cost and applicable to industrial production, and grading extraction of the thermal dissolution substance is further helpful for follow-up processing and utilization of the coal thermal dissolution substance.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and in particular relates to the preparation of coal hot melts. Background technique [0002] Separation of organic compounds in coal by pyrolysis to obtain thermally soluble coal (ash-free coal) is an important clean coal utilization technology researched and developed at home and abroad in recent years. Utilizing the characteristics of low ash content of thermally soluble coal, it can be directly It is injected into a gas turbine to generate electricity by combustion, and it can also realize efficient catalytic hydrogenation liquefaction of coal (Fuel, 2015, 139, 516-522. Energy Fuels, 2009, 23, 3652-3657.) and low-temperature catalytic gasification (Energy Fuels, 2009, 23, 1888-1895.), therefore, the preparation of coal thermal solution is an effective technical route to realize the clean transformation and efficient utilization of coal resources. At present, most of the prepar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D11/02C10L9/02
CPCB01D11/02C10L9/02
Inventor 任世彪姜涛水恒福雷智平王知彩
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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