Patent ID: 8002972
Filing Date: 2011-08-23
Classification: C01B,C10B,C10G,C10J

Abstract:
1. A method for producing petroleum products from oil shale, the method comprising the steps of (a) processing oil shale into oil shale granules of a predetermined diameter; (b) entering said oil shale granules into a kiln line of series-connected kilns; (c) removing moisture from said oil shale granules in a first kiln in said kiln line to produce dry oil shale granules; (d) feeding said dry oil shale granules into a second kiln in said kiln line; (e) indirectly roasting said dry oil shale granules in said second kiln to a temperature sufficient to cause pyrolysis; (f) withdrawing from said second kiln oil vapors containing hydrocarbons freed from said dry oil shale granules during said step of indirectly roasting in said second kiln; and (g) exhausting said oil shale from said kiln line substantially free of hydrocarbons.