Novel method for preparing pitch-based mesocarbon microbeads

A technology of mesocarbon microspheres and a new method, which is applied in the preparation/purification of carbon, coking carbon-containing materials, petroleum industry, etc., can solve the problems of difficult separation, poor uniform particle size distribution of microspheres, etc. control, good uniformity and easy subsequent separation

Inactive Publication Date: 2019-04-19
HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

[0003] The present invention proposes a preparation method of pitch-based mesophase carbon microspheres in order to solve the problems of poor particle size distribution of microspheres and difficulty in subsequent separation in the preparation process of existing pitch-based mesophase carbon microspheres

Method used

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  • Novel method for preparing pitch-based mesocarbon microbeads

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Experimental program
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Embodiment Construction

[0017] see figure 1 , this embodiment consists of the following steps:

[0018] Step A. Select the medium-temperature coal tar pitch heated at 230°C and thermally polymerize it at about 230°C

[0019] The mesophase pitch is mixed according to the ratio of 1:1-1.2, sent to the pre-mixing tank, heated to 250°C-270°C under the protection of nitrogen, and kept for 4 hours. After pretreatment, the raw materials enter the pre-reaction tank, and under the protection of nitrogen, Heating to 320°C-340°C, preheating polymerization reaction for 4 hours;

[0020] Step B, preheating the polymerized asphalt into the reactor, heating to 375-385°C under the protection of nitrogen,

[0021] The reaction pressure is 0.4-1.0MPa, and thermal polymerization is carried out for 8 hours to 16 hours;

[0022] Step C, the asphalt after thermal polymerization is cooled to 150°C-170°C through the reaction product heat exchanger, and an appropriate amount of quinoline solvent is added to the reaction p...

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Abstract

The invention relates to a novel method for preparing pitch-based mesocarbon microbeads, and belongs to the technical field of carbon material preparation. The method comprises the steps that the medium-temperature asphalt and mesophase asphalt which are mixed according to a certain proportion serve as raw materials, a thermal polymerization product is obtained through three different temperaturereaction stages of thermal pre-treatment, thermal pre-polymerization and thermal polymerization of the raw materials, and subjected to three separation methods of thermal filtration, centrifugal sedimentation and solvent extraction and washing to obtain a powder product and mesophase asphalt, the powder product is subjected to vacuum drying at a certain temperature to obtain the mesocarbon microbeads with the particle size of 1-3 micron, and the separated mesophase asphalt can be used as the raw material. The novel method has broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of carbon material preparation, and in particular relates to a new method for preparing pitch-based mesophase carbon microspheres. Background technique [0002] Mesophase carbon microspheres have excellent properties such as thermal stability, chemical inertness, high bulk density, excellent electrical and thermal conductivity, and easy graphitization. Ion battery anode materials are widely used. . Contents of the invention [0003] The present invention proposes a preparation method of pitch-based mesophase carbon microspheres in order to solve the problems of poor uniform particle size distribution of microsphere particles and difficulty in subsequent separation during the preparation process of existing pitch-based mesophase carbon microspheres. The present invention comprises the following steps: [0004] Step A, choose medium temperature coal tar pitch as raw material, and the mesophase pitch obtai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05C10B55/02
CPCC01B32/05C10B55/02
Inventor 景介辉徐秀梅林超群张泽宇王鹏吴大青孔小红
Owner HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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