| 摘要 |
A fractioning solvent deasphalting plant applies a solvent whose critical temperature is Tc to a hydrocarbon feed containing asphaltenes and atmospheric distillate having fractions that boil above about Tc-50 DEG F. such that said feed is separated into a substantially solvent-free product stream of atmospheric distillate, a substantially solvent-free product stream containing deasphalted oil substantially free of said atmospheric distillate, and a substantially solvent-free product stream containing asphaltenes substantially free of said atmospheric distillate.
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