METHOD FOR PRODUCING A PRECURSOR PITCH FOR CARBON FIBER

KAWASAKI STEEL 58-38,182 Precursor pitch to be used for formation of carbon fiber is produced by heating a coal tar soft or middle pitch at a temperature of 350-500.degree.C at a first stage to form mesophase, extracting the thus treated pitch with a solvent, separating and removing the solvent inso...

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Hauptverfasser:	YUDATE, KOZO, NAGASAWA, KEN
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHEMISTRY FUELS LUBRICANTS METALLURGY PEAT PETROLEUM, GAS OR COKE INDUSTRIES PYROLIGNEOUS ACID TECHNICAL GASES CONTAINING CARBON MONOXIDE WORKING-UP PITCH, ASPHALT, BITUMEN, TAR
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creator	YUDATE, KOZO NAGASAWA, KEN
description	KAWASAKI STEEL 58-38,182 Precursor pitch to be used for formation of carbon fiber is produced by heating a coal tar soft or middle pitch at a temperature of 350-500.degree.C at a first stage to form mesophase, extracting the thus treated pitch with a solvent, separating and removing the solvent insoluble portion including mesophase to obtain a pitch containing no free carbon and further at the second stage heat-treating the pitch containing no free carbon in an inert gas atmosphere under atmospheric pressure or a reduced pressure under the following condition 600-1.2 T ? 0 ? 1,800-3.6 T (provided that 350 ? T ? 500) wherein T(.degree.C) is the temperature of the heat treatment and .theta. (min) is the time for which said temperature is held, to form bulk mesophase pitch containing 20-60% by weight of quinoline insoluble portion.
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T ? 500) wherein T(.degree.C) is the temperature of the heat treatment and .theta. (min) is the time for which said temperature is held, to form bulk mesophase pitch containing 20-60% by weight of quinoline insoluble portion.</description><subject>CHEMISTRY</subject><subject>FUELS</subject><subject>LUBRICANTS</subject><subject>METALLURGY</subject><subject>PEAT</subject><subject>PETROLEUM, GAS OR COKE INDUSTRIES</subject><subject>PYROLIGNEOUS ACID</subject><subject>TECHNICAL GASES CONTAINING CARBON MONOXIDE</subject><subject>WORKING-UP PITCH, ASPHALT, BITUMEN, TAR</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1988</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZDD3dQ3x8HdRcPMPUggI8ncJdfb0c1dwBLJdnUODgkGiniHOHmB5Z8cgJ38_BTdPJ9cgHgbWtMSc4lReKM3NIO_mClSom1qQH59aXJCYnJqXWhLv7GhoZGxiamLhaExYBQCIECcL</recordid><startdate>19880329</startdate><enddate>19880329</enddate><creator>YUDATE, KOZO</creator><creator>NAGASAWA, KEN</creator><scope>EVB</scope></search><sort><creationdate>19880329</creationdate><title>METHOD FOR PRODUCING A PRECURSOR PITCH FOR CARBON FIBER</title><author>YUDATE, KOZO ; NAGASAWA, KEN</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_CA1234548A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre</language><creationdate>1988</creationdate><topic>CHEMISTRY</topic><topic>FUELS</topic><topic>LUBRICANTS</topic><topic>METALLURGY</topic><topic>PEAT</topic><topic>PETROLEUM, GAS OR COKE INDUSTRIES</topic><topic>PYROLIGNEOUS ACID</topic><topic>TECHNICAL GASES CONTAINING CARBON MONOXIDE</topic><topic>WORKING-UP PITCH, ASPHALT, BITUMEN, TAR</topic><toplevel>online_resources</toplevel><creatorcontrib>YUDATE, KOZO</creatorcontrib><creatorcontrib>NAGASAWA, KEN</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>YUDATE, KOZO</au><au>NAGASAWA, KEN</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>METHOD FOR PRODUCING A PRECURSOR PITCH FOR CARBON FIBER</title><date>1988-03-29</date><risdate>1988</risdate><abstract>KAWASAKI STEEL 58-38,182 Precursor pitch to be used for formation of carbon fiber is produced by heating a coal tar soft or middle pitch at a temperature of 350-500.degree.C at a first stage to form mesophase, extracting the thus treated pitch with a solvent, separating and removing the solvent insoluble portion including mesophase to obtain a pitch containing no free carbon and further at the second stage heat-treating the pitch containing no free carbon in an inert gas atmosphere under atmospheric pressure or a reduced pressure under the following condition 600-1.2 T ? 0 ? 1,800-3.6 T (provided that 350 ? T ? 500) wherein T(.degree.C) is the temperature of the heat treatment and .theta. (min) is the time for which said temperature is held, to form bulk mesophase pitch containing 20-60% by weight of quinoline insoluble portion.</abstract><edition>4</edition><oa>free_for_read</oa></addata></record>
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language	eng ; fre
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subjects	CHEMISTRY FUELS LUBRICANTS METALLURGY PEAT PETROLEUM, GAS OR COKE INDUSTRIES PYROLIGNEOUS ACID TECHNICAL GASES CONTAINING CARBON MONOXIDE WORKING-UP PITCH, ASPHALT, BITUMEN, TAR
title	METHOD FOR PRODUCING A PRECURSOR PITCH FOR CARBON FIBER
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