-
公开(公告)号:US4465586A
公开(公告)日:1984-08-14
申请号:US388017
申请日:1982-06-14
摘要: An improved process for preparing liquid crystal containing pitches includes extracting carbonaceous isotropic pitches with an organic solvent system which comprises at least one member of the group consisting of dioxane, dimethylacetamide, and tetramethylurea.
摘要翻译: 用于制备含有液晶的间距的改进方法包括用有机溶剂系统萃取含碳各向同性沥青,该有机溶剂体系包含二恶烷,二甲基乙酰胺和四甲基脲中的至少一种成员。