Preparation method of mesophase carbon microspheres with different particle sizes

A mesophase carbon microsphere and particle size technology, which is applied in carbon preparation/purification, sustainable manufacturing/processing, chemical industry, etc., can solve the problems of non-adjustable particle size, environmental pollution, high cost, etc., and achieve easy production and operation , prevent environmental pollution, low price effect

Inactive Publication Date: 2013-10-23
BAOWU CHARCOAL MATERIAL TECH CO LTD
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  • Description
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Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a method for preparing mesocarbon microspheres with different particle sizes, which solves the problems of

Method used

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  • Preparation method of mesophase carbon microspheres with different particle sizes

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Embodiment 1

[0035] The tower bottom bitumen with a softening point of 61°C was used as the reaction raw material, heated to 410°C at a heating rate of 80°C / h, the N2 flow rate was 90 liters / hour, the temperature was maintained for 3 hours, and the stirring rate was 150 rpm. Heating and extracting with washing oil distillate as solvent, filtering three times to separate the solid, and drying at about 250°C under vacuum conditions to obtain mesophase carbon microspheres with a D50 of 11 μm, with a yield of 21%.

Embodiment 2

[0037]Mix the asphalt at the bottom of the tower with a softening point of 61°C with the asphalt containing 33% QI and 47% TI to obtain asphalt containing 10% quinoline insolubles and 18% TI as the reaction raw material, and heat up at 80°C / h The heating rate was 410° C., the N2 flow rate was 90 liters / hour, the temperature was maintained for 3 hours, and the stirring rate was 150 rpm. Heating and extracting the washed oil distillate as a solvent, filtering three times to separate the solid, and drying at about 250°C and a pressure of 0.02MPa to obtain mesophase carbon microspheres with a D50 of 11μm, with a yield of 31%.

Embodiment 3

[0039] Proportioning the tower bottom asphalt with a softening point of 64°C and the asphalt containing 28% QI and 40% TI to obtain asphalt containing 5.6% quinoline insolubles and 13% TI as the reaction raw material, the temperature is programmed at 60°C / h Control the heating rate to 420°C, the N2 flow rate is 90 liters / hour, the temperature is maintained for 4 hours, and the stirring rate is 100 rpm. Heating and dissolving with washing oil distillate as a solvent, filtering three times to separate the solid, and drying at about 250°C and a pressure of 0.02MPa to obtain mesophase carbon microspheres with a D50 of 18μm, with a yield of 34%.

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Abstract

The invention relates to a preparation method of mesophase carbon microspheres with different particle sizes. Green pellet products of the mesophase carbon microspheres are obtained by adding asphalt type substances containing high quinoline insoluble matters and high toluene insoluble matters into asphalt, adjusting the composition of raw materials, and performing solvent extraction, filtration, separation and drying on a condensation polymerization reaction product. The preparation method disclosed by the invention has the advantages of simple preparation of the raw materials, low price, high yield of the mesophase carbon microspheres, uniform particle size distribution, and adjustable and controllable particle size. In addition, the byproduct asphalt can be used as soaker asphalt or can be used for preparing spinning asphalt with a high softening point, and the problems of low value of the byproduct and further influence on the cost of the carbon microsphere products can be solved. An extraction, separation and pre-drying integrated process has the advantages of reducing investment in equipment and instruments, shortening process flows, being easy to produce and operate, realizing the closed separation process and being environment-friendly.

Description

technical field [0001] The invention belongs to the field of carbon materials, and in particular relates to a preparation method of mesophase carbon microspheres (green balls). Background technique [0002] Mesophase carbon microspheres are a new type of carbon material. Due to their unique molecular-level parallel stacking structure and spherical characteristics, they have become electrode materials for lithium-ion secondary batteries, high-density isotropic carbon-graphite block materials, high-density It is the preferred material for specific surface microsphere activated carbon and filling material for high performance liquid chromatography. Especially with the arrival of low-carbon economy, new energy vehicles will become the new darling of the market. Due to its good structural stability, compatibility with electrolyte, large specific capacity, safety and reliability, high current charge and discharge, and suitable for power batteries, mesophase carbon microspheres ha...

Claims

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Application Information

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IPC IPC(8): C01B31/02C01B32/05
CPCY02P20/10
Inventor 侯文杰张秀云王亮陈伟平刘春法金洁
Owner BAOWU CHARCOAL MATERIAL TECH CO LTD
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