Preparation method of coal tar-based mesocarbon microbead

Abstract

The invention discloses a preparation method of a coal tar-based mesocarbon microbead, comprising a process flow of pretreatment of raw materials, pyrocondensation polymerization reaction, separation and drying. The preparation method specifically comprises the following steps of: extracting, separating and removing primary quinoline insolubles of coal tar, as the raw materials, by using a mixed solvent to obtain coal tar refined soft pitch; then polymerizing the coal tar refined soft pitch for 1-8 hours at 350-450 DEG C under the rotating speed of 100-500 r / min and under the protection of inert gases by using anthracene oil or silicone oil as a reaction system viscosity regulator to obtain carbon microbead-containing mesophase pitches; and extracting by using a solvent, and drying to obtain the mesocarbon microbead. The particle diameter of the coal tar-based mesocarbon microbead prepared by using the method is 1-150 mu m, and the mass percent can reach 20-50%. The preparation method of the coal tar-based mesocarbon microbead has the characteristics of high product yield, controllable particle diameter, good sphericity, simple and convenient process, rich raw material sources, low cost and the like.

Description

technical field

[0001] The invention belongs to the field of carbon materials, in particular to a method for preparing coal tar-based mesophase carbon microspheres. Background technique

[0002] Mesophase carbon microspheres (MCMB) is a new type of carbon material. Due to its unique layered structure and excellent physical and chemical properties, it is widely used in high-density C / C composites, high specific surface activated carbon and lithium-ion secondary battery anode materials. , high-performance liquid chromatography packing, catalyst carrier and other aspects have been well applied.

[0003] At present, the preparation methods of mesophase carbon microspheres mainly include thermal polycondensation method, emulsification method and suspension method. The thermal polycondensation method is to first polymerize the polycyclic aromatic hydrocarbon raw material by heat treatment to produce mesophase pitch containing carbon microspheres, and then use appropriate separati...