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Method for producing carbon fibers

A manufacturing method, carbon fiber technology, applied in the field of carbon fiber manufacturing, can solve the problems of insufficient effect and practical application, and achieve the effect of high thermal conductivity

Inactive Publication Date: 2013-10-23
RESONAC HOLDINGS CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, the effect of imparting thermal conductivity was not sufficient, so it has not been put into practical use.

Method used

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  • Method for producing carbon fibers

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0063] The preparation method of the supported catalyst is not particularly limited. For example, there is a method comprising dissolving or dispersing a compound containing a main catalyst element and a compound containing a promoter element in a solvent to obtain a catalyst solution, mixing the catalyst solution with a powdery carrier, followed by drying.

[0064] A dispersant and a surfactant may also be added to the catalyst solution. As surfactants, cationic surfactants and anionic surfactants are preferably used. By adding dispersants and surfactants, the stability of main catalyst elements and co-catalyst elements in the catalyst solution increases.

[0065] The concentration of the catalyst element in the catalyst solution can be appropriately selected according to the type of solvent, the type of catalyst element, and the like. Preferably, the amount of the catalyst solution mixed with the powdery and granular carrier corresponds to the liquid absorption amount of t...

Embodiment 1

[0100] 0.99 parts by mass of cobalt(II) nitrate hexahydrate and 0.006 parts by mass of hexammonium heptamolybdate were dissolved in 1 part by mass of methanol to prepare a catalyst solution.

[0101] This catalyst solution was added to and mixed with 1 part by mass of calcium carbonate (manufactured by Ube Material Industries, Ltd.: CS·3N-A30), followed by vacuum drying at 120° C. for 16 hours to obtain a supported catalyst.

[0102] A weighed supported catalyst was loaded on a quartz boat, and the quartz boat was placed in a quartz tubular reactor, and the reactor was sealed. The inside of the reactor was replaced with nitrogen, and the temperature of the reactor was raised from room temperature to 690° C. over 30 minutes while flowing nitrogen. While maintaining the temperature at 690° C., the nitrogen gas was switched to a mixed gas of nitrogen gas (50 parts by volume) and ethylene gas (50 parts by volume), and the mixed gas was circulated in the reactor for 60 minutes to p...

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Abstract

A method of manufacturing carbon fibers, the method comprising the steps of: obtaining a supported catalyst by allowing a main catalyst element such as Fe, Co and Ni and a co-catalyst element such as Ti, V, Cr, W and Mo to be supported by a particulate carrier such as calcium carbonate, calcium hydroxide and calcium oxide; synthesizing fibrous carbons by contacting the supported catalyst with a carbon atom-containing material at synthesis reaction temperature; and then heat treating the resulting fibrous carbons at a temperature of 2000° C. or higher, wherein the particulate carrier comprising a substance which undergoes pyrolysis near the synthetic reaction temperature.

Description

technical field [0001] The present invention relates to a method for producing carbon fibers. More specifically, the present invention relates to a method for manufacturing carbon fibers added to materials such as metals, resins, ceramics, etc., which can greatly improve the electrical conductivity and thermal conductivity of the materials, especially the thermal conductivity. The carbon fibers are suitable for use as: Fillers used to obtain heat-conducting molded bodies such as heat-conducting rolls and heat-dissipating sheets, or heat-conducting fluids such as nanofluids; electron emission materials for FED (field emission displays); catalyst supports for various reactions; It is used as a medium for absorbing hydrogen, methane or other gases; or as an electrode material for electrochemical devices such as batteries and capacitors. Background technique [0002] Metal particles, ceramic particles such as alumina, BN, and AlN, etc. are known as the thermally conductive fill...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/127C01B31/02
CPCC01B31/0293B82Y30/00D01F9/127Y10T428/2918C01B32/18B01J6/008
Inventor 神原英二
Owner RESONAC HOLDINGS CORPORATION