Burns, Doane, Swecker & Mathis
Retorting process
 Fines in the overhead vapors from an oil shale retort process in which fresh shale together with hot recycle combusted shale from a combustor are fed to a retort and at least partly fluidized by a countercurrent stripping gas stream are handled by (a) removing a portion of the fines in a vapor-solid separation (b) optionally subjecting the portion of fines to additional retorting in a fines retort (c) condensing the partially dedusted gas (d) separating the condensate into a substantially fines-free liquid oil and a wet solids and (e) recycling at least a portion of the wet solids to the retort, fines retort, and/or combustor whereby the liquid on the wet solids is recovered and/or burned and the wet solids are dried. 
Chevron Research Company
C
C10G
inventional
Bruce A.
Reynolds