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    • 8. 发明授权
    • Process for the production of mesophase
    • 中间相生产工艺
    • US4892642A
    • 1990-01-09
    • US298536
    • 1989-01-17
    • Hugh E. RomineTa-Wei Fu
    • Hugh E. RomineTa-Wei Fu
    • C10C3/00C10C3/04C10C3/08C10C3/10D01F9/145
    • C10C3/08C10C3/002C10C3/04
    • An improved process for producing an anisotropic pitch product suitable for carbon fiber manufacture. A carbonaceous feedstock substantially free of mesophase pitch is heated at elevated temperature while passing an oxidatively reactive sparging gas such as air through the feedstock. The oxidatively treated feedstock, which contains isotropic pitch, is solvent fractionated to recover a solid pitch which on fusion becomes an anisotropic pitch product having from 50 to 100 percent by volume mesophase. In one aspect of the invention the carbonaceous feedstock is oxidatively treated in a melt phase at a lower temperature and the resulting isotropic pitch is then heated at a higher temperature in a melt phase in the presence or absence of a non-oxidative sparging gas prior to solvent fractionation.
    • 一种用于生产适用于碳纤维制造的各向异性沥青产品的改进方法。 基本上不含中间相沥青的碳质原料在升高的温度下加热,同时使氧化反应性的鼓泡气体如空气通过原料。 包含各向同性沥青的经氧化处理的原料被溶剂分馏以回收固体沥青,其在熔化时成为具有50至100体积%中间相的各向异性沥青产物。 在本发明的一个方面,碳质原料在较低温度下在熔融相中进行氧化处理,然后在存在或不存在非氧化性鼓泡气体的情况下,在熔融相中将所得各向同性沥青加热, 溶剂分馏。