Plant and process for production of low temperature pumpable oil from oil shale and the like

Claim 1

A PROCESS FOR PRODUCING OIL FROM OIL SHALE, LEAVING A SOLID COMBUSTIBLE CARBONACEOUS RESIDUE, WHICH COMPRISES: ADMIXING SAID OIL SHALE IN SOLID-TO-SOLID MILLING CONTACT WITH HOT HEAT-CARRYING BODIES TO PYROLYZE SAID OIL SHALE AND PRODUCE THEREEBY AN EFFUENT OF OIL VAPORS AND GASES CONTAINING BOTH HEAVY AND LIGHT OIL FRACTIONS, AND A SOLID CARBONACEOUS RESIDUE, SAID HEAT-CARRYING BODIES BEING LARGER THAN THE AVERAGE SIZE OF SAID SOLID CARBONACEOUS RESIDUE; COOLING THE EFFUENT OIL VAPORS AND GASES TO A TEMPERATURE OF BETWEEN ABOUT 500 AND 800*F. TO THEREBY CONDENSE THE HEAVIER OIL FRACTIONS CONTAINED THEREIN; THERMALLY CRACKING THE HEAVIER OIL FRACTIONS BY ADMIXTURE WITH SAID HOT HEAT-CARRYING BODIES EMPLOYED IN THE PYRROLYSIS, TO PRODUCE A SECOND STREAM OF EFFUENT OIL VAPORS; CONDENSING BOTH THE UNCRACKED LIGHTER FRACTIONS AND THE CRACKED HEAVIER OIL FRACTIONS TO THEREBY PRODUCE A COMPOSITE OIL PRODUCT; COMBUSTING SAID SOLID CARBONACEOUS RESIDUE TO PRODUCE HOT PRODUCTS OF COMBUSTION; AND TRANSFERRING SOME OF THE HEAT IN SAID PRODUCTS OF COMBUSTION TO SAID OIL SHALE AND HEAVIER OIL FRACTIONS FOR THE PYROLYSIS AND CRACKING THEREOF RESPECTIVELY.