A kind of preparation method and preparation system of mesophase pitch

Abstract

The invention discloses a preparation method and a preparation system of mesophase pitch. The preparation method includes the following contents: (1) the first raw material enters a first reaction unit after being heated, and the first reaction material stream is obtained after the reaction; (2) ) After the second raw material is heated and the first reaction stream enters the second reaction unit, the second reaction stream is obtained after the reaction; (3) The second reaction stream is rapidly cooled and then enters the third reaction unit to contact with the carrier gas for processing , oil and gas products and mesophase pitch are obtained after treatment. The preparation system includes a heating unit, a first reaction unit, a second reaction unit, a quenching device, a third reaction unit and a fractionation system. The preparation system of the mesophase pitch can operate stably for a long period, and the mesophase pitch obtained by the above preparation method has good quality controllability and high yield.

Description

technical field [0001] The present invention relates to a preparation method and preparation system of mesophase pitch. Background technique [0002] Mesophase pitch is a nematic liquid crystal obtained by thermal polycondensation, catalytic modification, hydrogenation modification, solvent extraction, etc. using coal-based, petroleum-based, high molecular polymers and other aromatic compounds as raw materials. It is a mixture of many flat disc-shaped fused-ring aromatic hydrocarbons with optical anisotropy. Due to the wide range of raw material sources and low prices, mesophase pitch has the advantages of excellent performance, strong processability and high added value, and is recognized as a high-quality precursor of various carbon materials (such as high-modulus carbon fiber, needle coke, mesophase pitch). pitch-based carbon foam, electrode materials, etc.), which are widely used in national defense, aerospace, civil industry and other fields. [0003] CN87103787 discl...

AI Technical Summary

Problems solved by technology

[0006] To sum up, at present, one or a combination of thermal condensation polymerization, hydrogenation modification, catalytic modification and co-carbonization methods are used in the preparation process of mesophase pitch, and the process is relatively complicated.

Or use batch operation, the production efficiency is low, or use HF / BF 3 As a catalyst, it is highly corrosive and easy to cause corrosion to equipment; or co-carbonization of fractions with different properties, because the combination of additives and raw materials cannot be determined, after subsequent processing, carbonization, and graphitization, defects such as pores may appear. Affect the spinnability of mesophase pitch and the performance of carbon fiber

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