Method and apparatus for stripping oil from oil shale

Claim 1

A PROCESS FOR THE PYROLYSIS OF A COARSELY GROUND SOLID, SAID SOLID UPON BEING PYROLYZED LEAVING A COMBUSTIBLE RESIDUE, WHICH COMPRISES THE STEPS OF: SUBSTANTIALLY COMPLETELY PYROLYZING AND SIMULTANEOUSLY GRINDING SAID SOLID BY MEANS OF INERT HEAT-CARRYING BODIES IN A PYROLYSIS ZONE, THEREBY RENDERING THE BULK OF THE COMBUSTIBLE RESIDUES PRODUCED DIRECTLY FLUIDIZABLE, THE BULK OF THE COMBUSTIBLE RESIDUES PRODUCED HAVING A MESH SIZE SMALLER THAN SAID HEAT-CARRYING BODIES, TRANSFERRING SAID FLUIDIZABLE COMBUSTIBLE RESIDUE IN SAID COMBUSTION FLUIDIZING SAID COMBUSTIBLE RESIDUE IN SAID COMBUSTION ZONE BY MEANS OF A FLUIDIZING COMBUSTION-SUPPORTING GAS TO THEREBY PRODUCE HEAT, REMOVING THE HEAT-CARRYING BODIES FROM THE PYROLYSIS ZONE AND IMPARTING A SUBSTANTIAL PORTION OF THE HEAT PRODUCED IN SAID COMBUSTION ZONE TO SAID HEAT-CARRYING BODIES, AND RECYCLING SAID HEATED HEAT-CARRYING BODIES TO SAID PYROLYSIS ZONE TO PYROLYZE ADDITIONAL FRESH INCOMING SOLIDS.