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Preparation of precursor pitch of carbon fiber

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专利汇可以提供Preparation of precursor pitch of carbon fiber专利检索,专利查询,专利分析的服务。并且PURPOSE: To obtain the titled pitch having improved heat stability, spinnability and infusibility, high carbonization yield, containing neither free carbon nor ash, etc., by extracting tar pitch with an aromatic low-boiling solvent in a critical state.
CONSTITUTION: Tar pitch containing free carbon is dissolved in 1W5 times (preferably 2W2.5 times) as much an aromatic low-boiling solvent such as gas oil, etc. as the tar pitch by volume, heated at 260W320°C, pressurized at 30W60atm., materials insoluble in the solvent are separated and removed, and the solvent is further removed from the extracted oil, to give pitch containing no free carbon. The pitch is heat-treated preferably under reduced pressure or under bubbling of an inert gas at 350W450°C to give the desired pitch.
COPYRIGHT: (C)1985,JPO&Japio,下面是Preparation of precursor pitch of carbon fiber专利的具体信息内容。

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