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2. 发明授权

US4756818A A method for the production of a carbon fiber precursor 失效
标题翻译：一种生产碳纤维前体的方法
公开(公告)号：US4756818A
公开(公告)日：1988-07-12
申请号：US18200
申请日：1987-02-24
申请人： Siegfried Peter , Herbert Beneke , Franz Oeste , Wolfgang Fexer , Wolfgang Jaumann , Manfred Meinbreckse , Joachim Kempfert
发明人： Siegfried Peter , Herbert Beneke , Franz Oeste , Wolfgang Fexer , Wolfgang Jaumann , Manfred Meinbreckse , Joachim Kempfert
IPC分类号： C10C3/02 , C08L95/00 , C10C1/04 , C10C3/04 , C10C3/08 , D01F9/15 , C10C1/18
CPC分类号： C10C1/04 , C10C3/08 , D01F9/15
摘要： A method for the production of a carbon fiber precursor from coal tar pitch comprising extracting coal tar pitch at elevated temperatures and pressures with a mixture of a supercritical gas and an entraining agent to obtain a solution free of quinoline-insoluble components, recovering from the solution by lowering the pressure and/or raising the temperature to obtain at least one fraction selected from the group consisting of quinoline-soluble fraction and toluene-soluble fraction, treating the said fraction(s) at 380.degree. to 450.degree. C. under a non-oxidizing atmosphere at atmosphere pressure until 40 to 65% by volume of the product is converted into pitch containing mesophase, extracting the latter pitch with a mixture of supercritical gas and an entraining agent to remove isotropic pitch and recovering isotropic pitch with a mesophase content of at least 75% by volume, a pyridine-insoluble matter content of 20 to 50% by weight, a mean molecular weight of 900 to 1200 and a melting point of 330.degree. to 360.degree. C. and the isotropic pitch product produced therefrom and carbon fibers made from the isotropic pitch.
摘要翻译：一种从煤沥青沥青生产碳纤维前体的方法，包括在高温和高压下用超临界气体和夹带剂的混合物萃取煤焦油沥青以获得不含喹啉不溶性组分的溶液，从溶液中回收通过降低压力和/或升高温度以获得至少一种选自喹啉可溶级分和甲苯可溶级分的级分，在380-450℃下处理所述级分，在空气压力下的氧化气氛直到产物的40至65体积％转化为含有中间相的沥青，用超临界气体和夹带剂的混合物萃取后者沥青以除去各向同性沥青并回收各向同性沥青，中间相含量为至少75体积％，吡啶不溶物质含量为20〜50重量％，平均分子量为900〜1200，熔点为330〜360℃，由各向同性沥青产物及各向同性沥青制成碳纤维。

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