A method is disclosed for recovering bitumen from a carbonaceous solid feed and for recovering a carbonaceous liquid from a fines-containing carbonaceous liquid feed by extraction of the feed with a solvent of predetermined solvency power, wherein the recovered product has a low fines content....http://www.google.ca/patents/US4572777?utm_source=gb-gplus-sharePatent US4572777 - Recovery of a carbonaceous liquid with a low fines content
