Method of preparing nano-carbon fiber using coal tar asphalt as raw material

Abstract

The present invention relates to a method for preparing nano carbon fibre by using coal-tar pitch as raw material. It is characterized by that said method includes the following steps: using coal-tar pitch as raw material, using organic metal compound ferrocene as catalyst, using hydrochloric acid and deionized water as cleaning agent and using inert gas-argon gas as protective gas, in the tubular high-temperature furnal pyrolyzing chemical substance raw materials to make conversion from solid state to liquid state to gaseous state to liquid state to solid state form, make gaseous state molecular adsorption, decomposition, dissolution, diffusion and precipitation so as to obtain the nano carbon fibre product formed on the inner wall of quartz tube of tubular high-temperature furnace.

Description

technical field [0001] The invention relates to a method for preparing nano-carbon fibers by using coal tar pitch as a raw material, and belongs to the technical field of methods for preparing organic compound carbon materials. Background technique [0002] Coal tar refined from coal is a very important industrial raw material. During the refining process, coal tar will produce a large amount of residue, namely coal tar pitch, after extracting fractions through distillation. 50-60% is a large by-product in the coal tar processing process, and the reprocessing, re-refining and reuse of coal tar pitch are very important scientific research topics in the coal tar processing industry. [0003] Coal tar pitch is a black solid at room temperature 20°C±3°C, without a fixed melting point, in a glass phase, softens after being heated, and then melts, brittle in winter and softened in summer, with a density of 1.25-1.35g / cm 3 . [0004] The composition of coal tar pitch is mainly a ...

AI Technical Summary

Problems solved by technology

[0006] The production of carbon fiber from coal tar pitch as raw material is a high value-added utilization, and its preparation methods also have various forms, such as melt spinning method, explosion method, co-carbonization method, etc., but all have different degrees of disadvantages and deficiencies. Some preparation methods The process is complicated and the cost is high. Some production processes are seriously polluted, some consume large energy, and some produce products with low precision, low yield, and low purity, which are not ideal.

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