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A method for preparing layered nano-carbon materials by solvent heat treatment of coal

A technology of layered nano and carbon materials, applied in the direction of nano carbon, etc., to achieve the effect of fast decomposition and low initiation temperature

Active Publication Date: 2021-07-20
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above analysis, the embodiment of the present invention aims to provide a method for preparing layered nano-carbon materials by coal solvent heat treatment, to solve one of the following problems existing in the preparation of layered nano-carbon materials by graphite intercalation oxidation:

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  • A method for preparing layered nano-carbon materials by solvent heat treatment of coal
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  • A method for preparing layered nano-carbon materials by solvent heat treatment of coal

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Embodiment 1

[0065] Ash-free lignite is selected as the raw material, and the massive raw coal is crushed by mechanical crushing, and then sieved to control the particle size below 0.15mm. The pulverized raw coal was treated with 25 times deionized water in an ultrasonic cleaner (20 kHz) for 30 minutes, filtered and then dried in a drying machine at 110° C. until the water content was lower than 5%. Coal powder is mixed with benzyl alcohol-benzyl ether solvent to form coal slurry, which is then heated in a closed high-pressure reactor.

[0066] The molar ratio of the benzyl alcohol-benzyl ether solvent and the composition of the coal slurry are shown in Table 3. 400ml of coal slurry was injected into a 1L stainless steel reaction kettle, and the air was exhausted with nitrogen after sealing. The temperature of the coal slurry is raised to 380°C, the stirring rate is 300r / min, and the treatment time is 2.5h.

[0067]The solvent and low boilers are separated off after the liquefaction proce...

Embodiment 2

[0073] Ash-free lignite is selected as the raw material, and the massive raw coal is crushed by mechanical crushing, and then sieved to control the particle size below 0.15mm. The pulverized raw coal is treated with 25 times of deionized water in an ultrasonic cleaner (20kHz) for 30 minutes, filtered and dried at 110°C until the water content is lower than 5%; coal powder is mixed with benzyl alcohol-benzyl ether solvent to form a coal slurry , followed by heat treatment in a closed autoclave.

[0074] The molar ratio of benzyl alcohol-benzyl ether solvent is 1:1, the mass ratio of solvent to coal powder is 4:1, 400ml of coal slurry is injected into a 1L stainless steel reaction kettle, and the air is exhausted with nitrogen after sealing. Solvothermal treatment conditions are shown in Table 4.

[0075] The solvent and low boilers are separated off after the liquefaction process. Take 10g coal solvent heat treatment product, mix with 140ml oxidant (containing 23% nitric acid...

Embodiment 3

[0082] Ash-free lignite is selected as the raw material, and the massive raw coal is crushed by mechanical crushing, and then sieved to control the particle size below 0.15mm. The pulverized raw coal was treated with 25 times deionized water in an ultrasonic cleaner (20 kHz) for 30 minutes, filtered and then dried in a drying machine at 110° C. until the water content was lower than 5%. Coal powder is mixed with benzyl alcohol-benzyl ether solvent to form coal slurry, which is then heated in a closed high-pressure reactor.

[0083] The molar ratio of benzyl alcohol-benzyl ether solvent is 3:1, the mass ratio of solvent to coal powder is 6:1, 400ml of coal slurry is injected into a 1L stainless steel reaction kettle, and the air is exhausted with nitrogen after sealing.

[0084] The solvent and low boilers are separated off after the liquefaction process. Take 10g of the coal solvent heat treatment product and mix it with 140ml of oxidant. The oxidation treatment conditions ar...

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Abstract

The invention relates to a method for preparing layered nano-carbon materials by heat treatment of coal solvent, which belongs to the technical field of nano-carbon materials and solves the problem that the existing nano-carbon materials cannot meet the requirements of electrochemical energy storage parts, membrane materials and environmental protection adsorption materials. The method for preparing layered nano-carbon materials by coal solvent heat treatment provided by the invention comprises step 1, mixing coal powder and benzyl alcohol-benzyl ether solvent in proportion to form a coal slurry solvent; step 2, preparing a coal solvent heat treatment product by using the coal slurry solvent ; Step 3, the coal solvent heat treatment product is pre-oxidized by an oxidant to obtain a pre-oxidized product; Step 4, the pre-oxidized product is dispersed in ethanol, and ethylenediamine is added to form a gel; Step 5, the gel is dried The molded product is further heat-treated, and the heat-treated solid is cooled to obtain a layered nano-carbon material. The invention realizes the conversion from primary fossil material coal to layered nano carbon material.

Description

technical field [0001] The invention relates to the technical field of nano-carbon materials, in particular to a method for preparing layered nano-carbon materials through coal solvent heat treatment. Background technique [0002] The continuous development of nanotechnology has gradually brought revolutionary technological innovations to some important fields, such as chip manufacturing, microelectronics, information technology, energy, biotechnology and medical treatment. Some people believe that nanotechnology will bring about a new industrial revolution in the future. Nano-carbon materials have always been an important field in the development of nano-materials and technologies. It is no exaggeration to say that the discovery of fullerenes and carbon nanotubes has opened the era of nanotechnology. The recent major discovery of graphene has pushed the research on nano-carbon materials to a new orgasm. [0003] The research domain of carbon nanomaterials is also constant...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/15
CPCC01B32/15
Inventor 李峰波袁国卿宋延林
Owner INST OF CHEM CHINESE ACAD OF SCI
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