Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Raw material pitch for carbon fiber manufacturing

A technology of carbon fiber manufacturing and carbon fiber, which is applied in the field of pitch as a raw material for carbon fiber manufacturing, can solve problems such as raising the cost of carbon fiber manufacturing, and achieve the effect of cheap manufacturing

Active Publication Date: 2021-04-06
KOBE STEEL LTD +1
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the above-mentioned modification treatment of coal tar pitch becomes a factor that pushes up the production cost of carbon fibers.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Raw material pitch for carbon fiber manufacturing
  • Raw material pitch for carbon fiber manufacturing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0077] The above-mentioned embodiments do not limit the configuration of the present invention. Therefore, in the above-mentioned embodiment, omission, replacement or addition of constituent elements of each part of the above-mentioned embodiment may be made based on the description of this specification and technical common sense, and it should be construed that all of these belong to the scope of the present invention.

[0078] As an example, in this method of producing raw material pitch for carbon fiber production, the ash and the like in the slurry may not be separated from the ash-free coal in the pyrolyzed product forming process, but the ash and the like may be separated from the ash and the like in the next separation process. The insoluble components in the ashless coal are separated together.

[0079] In addition, in the production method of the raw material pitch for carbon fiber production, the heat treatment step may be omitted.

[0080] 【Example】

[0081] Here...

Embodiment 1

[0085] As the raw coal, bituminous coal produced in Australia with an oxygen content of 6.5% by mass on an anhydrous and ash-free basis was used. First, 1 kg of the above-mentioned bituminous coal pulverized to 1 mm or less was mixed with 5 kg of methylnaphthalene, charged into an autoclave, kept at 400° C. for 1 hour in a nitrogen atmosphere, and then cooled to obtain a pyrolyzed product. Next, 5 kg of methylnaphthalene was further added to the pyrolyzed product, stirred at an extraction temperature of 60° C. for 1 hour, the soluble components were extracted, filtered, and the obtained filtrate was distilled under reduced pressure to separate the soluble components. This soluble component was heat-treated for 1 hour in a nitrogen atmosphere at a heat treatment temperature of 230° C., whereby the raw material pitch for carbon fiber production of Example 1 was obtained.

Embodiment 2

[0087] In Example 2, trial production was carried out under the same conditions as in Example 1 above, except that the extraction temperature was 80°C. In Example 3, trial production was carried out under the same conditions as in Example 1 above, except that the extraction temperature was 100°C. In Example 4, a trial production was carried out under the same conditions as in Example 1 above except that the heat treatment temperature was set to 250°C. In Example 5, trial production was carried out under the same conditions as in Example 1 above, except that the extraction temperature was 80°C and the heat treatment temperature was 250°C. In Example 6, trial production was carried out under the same conditions as in Example 1 above, except that the extraction temperature was 100°C and the heat treatment temperature was 250°C.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
softening pointaaaaaaaaaa
softening pointaaaaaaaaaa
Login to View More

Abstract

An object of the present invention is to provide a raw material pitch for carbon fiber production that can produce carbon fibers excellent in tensile strength at relatively low cost. The raw material pitch for carbon fiber production of the present invention is obtained from coal and is used for producing carbon fibers by melt spinning, and is characterized in that the content of oxygen is 1.0% by mass or more, and the content of toluene-soluble components is 20% Mass% or more. The above-mentioned coal may be bituminous coal or sub-bituminous coal. The raw material pitch for carbon fiber production can be obtained by performing a solvent extraction treatment at a temperature lower than 300°C from a pyrolyzed product of coal in a solvent, and heat-treating the soluble component thus separated at a temperature of 150°C or higher. obtained substance.

Description

technical field [0001] The present invention relates to raw material pitch for carbon fiber production. Background technique [0002] Carbon fibers are widely used, for example, as reinforcements for structural materials such as resins, concrete, and ceramics. In addition, carbon fiber is also utilized as, for example, a heat insulating material, an activated carbon raw material, an electrically conductive material, a heat conductive material, and the like. [0003] Carbon fibers are generally produced by spinning synthetic resins such as polyacrylonitrile and pitch obtained from petroleum or coal into fibers, and infusible (air oxidation) and carbonization of the filaments. Among the above-mentioned raw materials, coal tar pitch is a viscous black substance obtained by distilling off volatile components such as naphthalene from coal tar, a by-produced liquid substance, when coal is dry-distilled to produce coke. . Such coal pitch is a mixture of various compounds contain...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C10C3/02D01F9/15
CPCC08L95/00C10C3/002C10C3/08D01F9/15C10C3/02C10C3/026
Inventor 滨口真基和田祥平井上聪则尹圣昊
Owner KOBE STEEL LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com