Production method of mesophase pitch and production system thereof

Abstract

The invention discloses a production method of mesophase pitch and a production system thereof, and the production method comprises the following steps: heating a raw material, feeding the heated raw material into a reaction unit A, rapidly cooling the reaction effluent, feeding the cooled reaction effluent into a reaction unit B, and contacting the cooled reaction effluent with a carrier gas for treatment to obtain an oil gas product and the mesophase pitch, and the oil-gas product further enters a fractionation system to be treated. The production system comprises a heating furnace, a reaction unit A, a quenching device, a reaction unit B and a fractionation system. According to the production method of the mesophase pitch, the target product yield is high, the quality controllability is good, and long-period stable continuous production can be achieved.

Description

technical field [0001] The invention relates to a production method and production system of mesophase pitch. Background technique [0002] Mesophase pitch is a kind of nematic liquid crystal with optical anisotropy. It is an important precursor of carbon materials and can be used to prepare high value-added mesophase pitch-based carbon fibers, needle coke, carbon foam and other carbon materials. The special structural characteristics of mesophase pitch endow these materials with excellent heat resistance, high thermal conductivity and high electrical conductivity, and have broad application prospects in aerospace, precision electronics, energy and many other fields. The raw materials used to prepare mesophase pitch have obvious diversity, such as pure aromatics, petroleum pitch, coal tar, coal tar pitch, coal liquefaction residue, etc. The difference in raw materials leads to the diversity of preparation methods and preparation processes. At present, the commonly used meso...

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Problems solved by technology

[0006] To sum up, at present, most of the mesophase pitch preparation process adopts batch operations, such as reactors. In order to prepare high-quality mesophase pitch, two or more processes are usually used for compounding, and the process is relatively complicated.

Additives and raw materials belong to different categories of additives. Because the combination of additives and raw materials cannot be determined, defects such as pores may appear after subsequent processing, carbonization, and graphitization, which will affect the spinnability of mesophase pitch and the performance of carbon fibers.

In addition, for reactor equipment, especially in the high-temperature reaction area, the side wall effect is more serious, and it is easy to form coke-like substances insoluble in quinoline on the reactor wall and the bottom of the reactor, which seriously affects the uniformity and quality

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