Process of preparing a donor solvent for coal liquefaction

Details Process of preparing a donor solvent for coal liquefaction Process of preparing a donor solvent for coal liquefaction

C - Chemistry, Metallurgy

10

G

196/5.9

C10G 1/04 (2006.01) C10G 1/00 (2006.01)

Patent

CA 1280708

ABSTRACT OF THE DISCLOSURE A process of preparing a donor solvent for coal liq??- faction. Liquified coal is distilled to separate the coal into a fraction having a boiling point less than about 350°F. and a residue having a boiling point greater than about 350°F. The residue from the distillation is deasphalted in a first solvent capable of substantially extracting from the residue a first oil comprising lower molecular weight com- pounds and saturated compounds. The residue from the first deasphalting step is then deasphalted in a second solvent ca- pable of substantially extracting from the residue a second oil comprising concentrated aromatic and heterocyclic com- pounds and leaving in the residue asphaltenes and ash. The second oil can be used as a donor solvent. The second oil extracted in the second deasphalting step is preferably par- tially hydrogenated prior to use as a donor solvent for the liquefaction of coal.

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