| 摘要 |
Coal tar pitch is contacted with a promoter liquid having a 5 volume percent distillation temperature of at least 250 DEG F. and a 95 volume percent distillation temperature of at least 350 DEG F. and no greater than about 750 DEG F., with the liquid having a characterization factor of at least 9.75 to promote the separation of quinoline insolubles from the pitch. A coal tar pitch fraction essentially free of quinoline insolubles is then subjected to coking to produce a needle coke. The process is also applicable to separation of quinoline insolubles from coal tar derived binder pitch.
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