Method for producing graphite fibers by catalytic graphitization
The invention provides a method for producing graphite fibers by catalytic graphitization, the method comprises the following steps: taking polyacrylonitrile-based precursor, and pre-oxidizing in air atmosphere; performing low-temperature carbonization; performing high-temperature carbonization; pre...
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| creator | ZHAO HUI LI YONG QIAN YANGPING |
| description | The invention provides a method for producing graphite fibers by catalytic graphitization, the method comprises the following steps: taking polyacrylonitrile-based precursor, and pre-oxidizing in air atmosphere; performing low-temperature carbonization; performing high-temperature carbonization; preparing a boron-containing catalyst; soaking the carbonized carbon fibers in a boron-containing catalyst and drying at the temperature of 180-200 DEG C, wherein the drying time is 60-90 s; and graphitizing: graphitizing for 20-40 seconds in an argon atmosphere at the temperature of 2200-2400 DEG C to obtain the graphite fibers. According to the invention, hydrogen chloride gas with a certain concentration is introduced into the carbonization section atmosphere, so that the carbonization time and temperature can be reduced, and the purity of fibers can be improved; meanwhile, the carbonized fiber is impregnated with a boron compound and then graphitized, the graphitization temperature can be reduced, the graphitizati |
| format | Patent |
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According to the invention, hydrogen chloride gas with a certain concentration is introduced into the carbonization section atmosphere, so that the carbonization time and temperature can be reduced, and the purity of fibers can be improved; meanwhile, the carbonized fiber is impregnated with a boron compound and then graphitized, the graphitization temperature can be reduced, the graphitizati</description><language>chi ; eng</language><subject>APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS ; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS ; NATURAL OR ARTIFICIAL THREADS OR FIBRES ; SPINNING ; TEXTILES</subject><creationdate>2022</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20220128&DB=EPODOC&CC=CN&NR=113981569A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76516</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20220128&DB=EPODOC&CC=CN&NR=113981569A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>ZHAO HUI</creatorcontrib><creatorcontrib>LI YONG</creatorcontrib><creatorcontrib>QIAN YANGPING</creatorcontrib><title>Method for producing graphite fibers by catalytic graphitization</title><description>The invention provides a method for producing graphite fibers by catalytic graphitization, the method comprises the following steps: taking polyacrylonitrile-based precursor, and pre-oxidizing in air atmosphere; performing low-temperature carbonization; performing high-temperature carbonization; preparing a boron-containing catalyst; soaking the carbonized carbon fibers in a boron-containing catalyst and drying at the temperature of 180-200 DEG C, wherein the drying time is 60-90 s; and graphitizing: graphitizing for 20-40 seconds in an argon atmosphere at the temperature of 2200-2400 DEG C to obtain the graphite fibers. According to the invention, hydrogen chloride gas with a certain concentration is introduced into the carbonization section atmosphere, so that the carbonization time and temperature can be reduced, and the purity of fibers can be improved; meanwhile, the carbonized fiber is impregnated with a boron compound and then graphitized, the graphitization temperature can be reduced, the graphitizati</description><subject>APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS</subject><subject>CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS</subject><subject>NATURAL OR ARTIFICIAL THREADS OR FIBRES</subject><subject>SPINNING</subject><subject>TEXTILES</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2022</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZHDwTS3JyE9RSMsvUigoyk8pTc7MS1dIL0osyMgsSVVIy0xKLSpWSKpUSE4sScypLMlMhklmViWWZObn8TCwpiXmFKfyQmluBkU31xBnD93Ugvz41OKCxOTUvNSSeGc_Q0NjSwtDUzNLR2Ni1AAA_n8x5Q</recordid><startdate>20220128</startdate><enddate>20220128</enddate><creator>ZHAO HUI</creator><creator>LI YONG</creator><creator>QIAN YANGPING</creator><scope>EVB</scope></search><sort><creationdate>20220128</creationdate><title>Method for producing graphite fibers by catalytic graphitization</title><author>ZHAO HUI ; LI YONG ; QIAN YANGPING</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_CN113981569A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>chi ; eng</language><creationdate>2022</creationdate><topic>APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS</topic><topic>CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS</topic><topic>NATURAL OR ARTIFICIAL THREADS OR FIBRES</topic><topic>SPINNING</topic><topic>TEXTILES</topic><toplevel>online_resources</toplevel><creatorcontrib>ZHAO HUI</creatorcontrib><creatorcontrib>LI YONG</creatorcontrib><creatorcontrib>QIAN YANGPING</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>ZHAO HUI</au><au>LI YONG</au><au>QIAN YANGPING</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Method for producing graphite fibers by catalytic graphitization</title><date>2022-01-28</date><risdate>2022</risdate><abstract>The invention provides a method for producing graphite fibers by catalytic graphitization, the method comprises the following steps: taking polyacrylonitrile-based precursor, and pre-oxidizing in air atmosphere; performing low-temperature carbonization; performing high-temperature carbonization; preparing a boron-containing catalyst; soaking the carbonized carbon fibers in a boron-containing catalyst and drying at the temperature of 180-200 DEG C, wherein the drying time is 60-90 s; and graphitizing: graphitizing for 20-40 seconds in an argon atmosphere at the temperature of 2200-2400 DEG C to obtain the graphite fibers. According to the invention, hydrogen chloride gas with a certain concentration is introduced into the carbonization section atmosphere, so that the carbonization time and temperature can be reduced, and the purity of fibers can be improved; meanwhile, the carbonized fiber is impregnated with a boron compound and then graphitized, the graphitization temperature can be reduced, the graphitizati</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING TEXTILES |
| title | Method for producing graphite fibers by catalytic graphitization |
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