| 摘要 |
Insoluble material is separated from a coal liquefaction product by use of a promoter liquid having a 5 volume percent distillation temperature of at least 250 DEG F., most preferably at least 400 DEG F. and a 95 volume percent distillation temperature of at least 350 DEG F. and no greater than about 750 DEG F. The liquid has a characterization factor of at least 9.75. By use of the promoter liquid, insoluble material can be effectively separated from the coal product by a gravity settling technique. A preferred gravity settling apparatus is also disclosed.
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