Method for catalytic synthesis of high quality intermediate phase carbon material with pure aromatic hydrocarbon

Abstract

The invention relates to a method for catalytic synthesis of a high quality intermediate phase carbon material with pure aromatic hydrocarbon. The method includes the steps of: (1) taking one or two of fraction naphthalene and anthracene in coal tar as the raw material, conducting blending and adding the raw material into a raw material tank, performing mixing and heating, then adding a catalyst and conducting full stirring; (2) adding the liquid mixture of step (1) into a microwave heating reactor through a metering pump; (3) controlling the temperature of a liquid outlet of the microwave heating reactor at 195DEG C; (4) cooling a mixed compound left by distillation at the bottom of a distillation kettle to 160DEG C, and performing full stirring till stratification; (5) heating a lower separated liquid X2 obtained by step (4) to 180-200DEG C, then passing the liquid through a fractionating tower to obtain a distilled liquid S3; (6) transferring high purity asphalt Z obtained in step (5) into a growth furnace, and performing stirring, at the same time introducing nitrogen, and conducting heat preservation for 6h to generate an intermediate phase carbon material, i.e. intermediate phase asphalt; and (7) taking the product obtained by cooling in step (6) out rapidly, and loading the product into a nitrogen protected sealed barrel. The method provided by the invention improves the content of the intermediate phase, and the preparation method is simple and is convenient for popularization and use.

Description

technical field [0001] The invention belongs to the field of carbon industry, and in particular relates to a method for catalytically synthesizing high-quality mesophase carbon materials using pure aromatic hydrocarbons. Background technique [0002] Mesophase carbon material, that is, mesophase pitch, is the necessary stage to obtain graphitized carbon material. Mesophase pitch has properties such as high carbonization yield and easy graphitization, and is widely used in the preparation of high value-added carbon materials such as pitch-based carbon fibers, graphite fibers, carbon / carbon composites, and needle coke for ultra-high-power electrodes. Coal pitch, petroleum pitch and pure aromatic compounds are the main raw materials for the preparation of mesophase pitch. The chemical composition of coal pitch and petroleum pitch is complex and the content of impurities is high, which leads to the high ash content of the prepared mesophase pitch and the difficulty of melt spinn...

AI Technical Summary

Problems solved by technology

However, the morphology and structure of the mesophase pitch produced by the current preparation method are not ideal, and there are unfused small spheres on the surface

At the same time, the use of aluminum trichloride has the disadvantage that it is difficult to separate and recycle the same reaction system. The catalyst is not completely removed, resulting in low product purity and high ash content, which directly affects the spinnability of the mesophase pitch and the final carbon fiber performance. Seriously troubled researchers at home and abroad, resulting in the failure of the preparation process to promote

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