| 发明名称 |
High coking value pitch |
| 摘要 |
A high coking value pitch prepared from coal tar distillate and has a low softening point and a high carbon value while containing substantially no quinoline insolubles is disclosed. The pitch can be used as an impregnant or binder for producing carbon and graphite articles. |
| 申请公布号 |
US8747651(B2) |
申请公布日期 |
2014.06.10 |
| 申请号 |
US20080154430 |
申请日期 |
2008.05.22 |
| 申请人 |
GrafTech International Holdings Inc. |
发明人 |
Miller Douglas J.;Chang Ching-Feng;Lewis Irwin C.;Lewis Richard T. |
| 分类号 |
C10C1/04 |
主分类号 |
C10C1/04 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method of creating a pitch, comprising:
a) heating a coal tar distillate having a boiling range beginning from at least 270° C. under pressure to obtain a tar; b) distilling the tar to create a pitch having a coking value of at least 55% and a softening point of at least 110° C. and less than 140° C., wherein the pitch has less than about 0.5% quinoline insolubles by weight.
|
| 地址 |
Parma OH US |
