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Preparation of coal tar pitch

阅读:333发布:2021-12-05

专利汇可以提供Preparation of coal tar pitch专利检索,专利查询,专利分析的服务。并且PURPOSE: To obtain pitch useful for impregnation carried out to densify and strengthen a carbon product, by thermally treating coal tar or coal pitch and forming an initial mesophase followed by adjusting the softening point thereof to a desired value.
CONSTITUTION: Coal tar pitch of free carbon content ≤1% or coal tar of free carbon content ≤0.6% is thermally treated at 350W450°C to form not more than 1% mesophase. The softening point of the obtd. coal tar pitch of coal tar is adjusted to a desired value. When high-temp. carbonized coal tar or coal tar pitch is used as a raw material, a high carbonization yield is obtd. because of high aromaticity and a high carbonization rate. Thus it is poasible to uniformly impregnate a carbon product with a large amt. of pitch and to economically prepare a pitch for impregnation excellent in impregnation efficiency and carbonized in a high yeild.
COPYRIGHT: (C)1982,JPO&Japio,下面是Preparation of coal tar pitch专利的具体信息内容。

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