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Method for preparing universal pitch charcoal fibre

A pitch carbon, general-purpose technology, applied in the chemical characteristics of fibers, textiles and papermaking, etc., can solve the problems of high cost, high equipment requirements, complex process flow, etc., and achieves high residual carbon value, simple preparation process, and small discreteness. Effect

Inactive Publication Date: 2008-03-05
SICHUAN CHUANGYUE CARBON MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two methods have complicated process flow, high cost and high requirements on equipment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Put ethylene tar with 7% carbon residue and 0.03% ash into the reactor, let air in and stir at the same time, the ratio of the mass of ethylene tar to the air flow is 2000g: 0.4m 3 / h, according to the heating rate of 1.5 °C / min, the temperature was raised to 330 °C, and the temperature was kept at this temperature for 1 hour, and then the temperature was raised to 360 °C under the protection of nitrogen, and the temperature was kept at this temperature for 4 hours. General-purpose pitch carbon fibers were prepared by melt spinning, non-melting, and carbonization. The melt spinning temperature above is 330°C and the pressure is 0.3 MPa; the final non-melting temperature is 290°C, and the non-melting time is 8 hours; the carbonization temperature is 900°C and the heating rate is 1°C / min. The properties of the raw material pitch and carbon fiber are shown in Table 1.

Embodiment 2

[0017] Put ethylene tar with 8% carbon residue and 0.04% ash into the reaction kettle, feed air and stir at the same time, the ratio of the mass of ethylene tar to the air flow rate is 1900g: 0.3m 3 / h, according to the heating rate of 1.0 °C / min, the temperature is raised to 320 °C, and the temperature is kept at this temperature for 3 hours. Then the temperature was raised to 370° C. under the protection of nitrogen, and kept at this temperature for 3 hours. General-purpose pitch carbon fibers were prepared by melt spinning, non-melting, and carbonization. The melt spinning temperature above is 360°C and the pressure is 0.5MPa; the final non-melting temperature is 300°C, and the non-melting time is 7 hours; the carbonization temperature is 1000°C and the heating rate is 2°C / min. The properties of the raw material pitch and carbon fiber are shown in Table 1.

Embodiment 3

[0019] Put ethylene tar with 10% carbon residue and 0.01% ash into the reactor, let air in and stir at the same time, the ratio of the mass of ethylene tar to the air flow rate is 1800g: 0.2m 3 / h, according to the heating rate of 0.5 ° C / min to 260 ° C, at this temperature for 7 hours. Then the temperature was raised to 380° C. under the protection of nitrogen, and kept at this temperature for 0.5 hours. General-purpose pitch carbon fibers were prepared by melt spinning, non-melting, and carbonization. The melt spinning temperature above is 325°C and the pressure is 0.8 MPa; the final non-melting temperature is 280°C, and the non-melting time is 11 hours; the carbonization temperature is 1200°C and the heating rate is 3°C / min. The properties of the raw material pitch and carbon fiber are shown in Table 1.

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Abstract

The process of universal asphalt carbon fiber includes setting ethylene bottom oil into a reaction kettle, introducing air in the oil weight and air flow rate ratio of 1800-2000 g to 0.2-0.4 cu m / hr while stirring, heating in the rate of 0.5-1.5 deg / min to 260-330 deg.c and maintaining for 1-7 hr, heating to 320-380 deg.c under protection of nitrogen and maintaining for 0.5-4 hr to obtain spinning asphalt, melt spinning and carbonizing to obtain universal asphalt carbon fiber. The present invention has simple technological process and low cost, and is suitable for industrial production.

Description

technical field [0001] The invention belongs to a method for preparing general-grade pitch carbon fiber. Background technique [0002] The research on pitch-based carbon fiber began in the 1960s. The manufacturing process of pitch-based carbon fiber was invented by Japan Sugiro Otani, and industrialized production was realized by Kureha Chemical Company in 1970. In 1970, United Carbide Corporation of the United States also successfully developed pitch-based carbon fiber using petroleum pitch as raw material, and it began to be put into industrial production in 1982. Japan Graphite Fiber Co., Ltd. inherited the technical strength of Japan Steel and Japan Petroleum Corporation. In 1995, it jointly established the "Granoc" pitch carbon fiber company to actively carry out research on the application of pitch-based carbon fibers, which not only improved product performance, but also developed Many new varieties have been introduced, such as low-modulus type, medium-modulus type,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/145
Inventor 刘朗闫曦史景利郭全贵张福强郑争旗余洋
Owner SICHUAN CHUANGYUE CARBON MATERIAL
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