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Preparation method and device of spinnable mesophase pitch

A mesophase pitch and preparation device technology, which is applied to chemical instruments and methods, chemical processing of tar pitch/petroleum pitch/natural pitch, chemical/physical/physicochemical fixed reactors, etc., can solve the problem of continuous production, Low yield and other problems, to achieve the effect of improving spinnability, reducing energy consumption and accelerating reaction

Active Publication Date: 2021-11-23
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method also has the disadvantages of low yield and incapable of continuous production.

Method used

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  • Preparation method and device of spinnable mesophase pitch
  • Preparation method and device of spinnable mesophase pitch
  • Preparation method and device of spinnable mesophase pitch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] A preparation device for spinnable mesophase pitch, such as Figure 1~2As shown, it is composed of a vertical tube reactor 210, a feeder 110, a thermal insulation layer 240, a horizontal rotating agitator 220, an air inlet pipe 410 and an air outlet pipe 510;

[0064] The cavity used for reaction inside the vertical pipe reactor 210 is in the shape of a hollow cylinder, and the aspect ratio of the hollow part of the hollow cylinder is 10 to 40:1; For the resistance heating device 230 for segmental temperature control of the chamber; the resistance heating device 230 includes several sections of heating resistance wires, and several sections of heating resistance wires are arranged equidistantly from top to bottom in the vertical direction of the standpipe reactor , sorted from top to bottom, the highest position of the first section of heating resistance wire is flush with the top of the standpipe reactor, and the lowest position of the last section of heating resistanc...

Embodiment 2

[0070] A preparation method of spinnable mesophase pitch is carried out by using a preparation device for spinnable mesophase pitch in Example 1, and the parameters of the preparation device are set as follows:

[0071] The aspect ratio of the hollow part of the hollow cylinder is 10:1;

[0072] The resistance heating device includes 2 sections of heating resistance wires. The 2 sections of heating resistance wires are arranged from top to bottom in the vertical direction of the standpipe reactor. The top of the vertical reactor is flush, the lowest position of the heating resistance wire in the second section is flush with the bottom of the vertical reactor, and the distance between the two sections is 1cm;

[0073] The central axis of rotation is placed from the top of the cavity until one end of the central axis of rotation is located 1 cm above the bottom of the cavity;

[0074] The shape of the rotating blade is fan-shaped; the ratio of the arc length of the fan to the r...

Embodiment 3

[0080] A preparation method of spinnable mesophase pitch is carried out by using a preparation device for spinnable mesophase pitch in Example 1, and the parameters of the preparation device are set as follows:

[0081] The aspect ratio of the hollow part of the hollow cylinder is 40:1;

[0082] The resistance heating device includes 10 sections of heating resistance wires. The 10 sections of heating resistance wires are arranged equidistantly from top to bottom in the vertical direction of the standpipe reactor, and arranged from top to bottom. The highest position of the first section of heating resistance wires is It is flush with the top of the vertical tube reactor, the lowest position of the last heating resistance wire is flush with the bottom of the vertical tube reactor, and the distance between two adjacent heating resistance wires is 1cm;

[0083] The central axis of rotation is placed from the top of the cavity until one end of the central axis of rotation is locat...

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Abstract

The invention relates to a preparation method and device of spinnable mesophase pitch. According to the preparation method, polymerization of different components in different temperature zones is realized based on self-migration of asphalt as a mixture with different molecular weights under thermal action, so that molecular weight distribution is narrowed. The device comprises a vertical tubular reactor, a cavity used for reaction in the vertical tubular reactor is of a hollow cylinder shape, and the length-diameter ratio of the hollow part is (10-40): 1. The preparation method comprises the following steps: carrying out segmented temperature control and inert atmosphere protection on the cavity, continuously feeding asphalt from the top of the cavity, continuously discharging the asphalt from the bottom of the cavity, and carrying out gradient non-isothermal polymerization to obtain the spinnable mesophase asphalt. The mesophase of the prepared spinnable mesophase pitch is in a wide-area streamline shape, the content of the mesophase is greater than 90%, and the ratio of the mole number of the molecular weight with the highest mole number in molecules to the sum of the mole numbers of all the molecular weights is greater than 80 mol%. According to the invention, dynamic separation and gradient non-isothermal polymerization of mesophase pitch components are realized, and the spinnability of the mesophase pitch is improved.

Description

technical field [0001] The invention belongs to the technical field of new carbon materials, and relates to a preparation device and method of spinnable mesophase pitch. Background technique [0002] Mesophase pitch is a nematic thermotropic liquid crystal substance formed by the accumulation of large planar polycyclic aromatic hydrocarbon molecules, which exhibits birefringence characteristics. It is prepared by catalyzing polycondensation under the action of a catalyst. Mesophase pitch is suitable for forming a highly anisotropic graphite-like structure to maximize the performance of the product. Therefore, it has become an excellent precursor for the preparation of ultra-high modulus and ultra-high thermal conductivity carbon fibers. [0003] The mesophase pitch-based carbon fiber prepared with mesophase pitch as the precursor has become an ideal material for use in harsh environments such as high speed, high temperature, and sudden cooling and sudden heating in the aero...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/18B01J19/00C10C3/02C10C3/04
CPCB01J19/1812B01J19/0053B01J19/0013C10C3/02C10C3/04B01J2219/00155B01J2219/00135B01J2219/00087Y02E60/10
Inventor 吕永根尉言哲陈涛程习松韩磊杨常玲
Owner DONGHUA UNIV
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