发明名称 |
BATCH PROCESS FOR MAKING HIGH FLASH POINT PITCH |
摘要 |
A method for producing a high-flash-point impregnating pitch that comprises charging coal tar into a batch still; heating the coal tar to an intermediate liquid state of soft pitch; maintaining the intermediate temperature of the soft pitch at a steady level; and introducing sparging gas while maintaining the temperature of the coal tar at a substantially steady level. The method of the present invention provide a pitch that has a softening point of about 90 DEG C and a flash point of above about 270 DEG C.
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申请公布号 |
WO03050204(A8) |
申请公布日期 |
2003.08.07 |
申请号 |
WO2002US38304 |
申请日期 |
2002.12.03 |
申请人 |
UCAR CARBON COMPANY INC. |
发明人 |
ORAC, THOMAS, HARRY |
分类号 |
C10C1/16;C10C3/04;(IPC1-7):C10C1/00;C10C1/04;C10C3/00 |
主分类号 |
C10C1/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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