Distillation of carbonaceous solids

Claim 1

THE METHOD WHICH COMPRISES CONTACTING CARBONACEOUS SOLIDS IN DISTILLATION ZONE WITH SUFFICIENT HOT DISTILLATION RESIDUE FROM PREVIOUSLY DISTILLED CARBONACEOUS SOLIDS, TO RAISE THE TEMPERATURE OF SAID ZONE TO THE POINT WHERE DISTILLATION OF SAID CARBONACEOUS SOLIDS IS EFFECTED TO PRODUCE VOLATILE PRODUCTS AND SOLID DISTILLATION RESIDUE STILL RETAINING VOLATILE COMPONENTS, PASSING AT LEAST A PORTION OF SAID DISTILLATION RESIDUE THROUGH A HEATING ZONE WHICH IS MAINTAINED AT A TEMPERATURE ABOVE THAT OF THE DISTILLATION ZONE, WHEREBY MORE VOLATILE MATTER IS EVOLVED AND THE TEMPERATURE OF THE RESIDUE IS RAISED, RETURNING ONLY THE HEATED DISTILLATION RESIDUE TO THE DISTILLATION ZONE, BURNING A PORTION OF THE DISTILLATION RESIDUE OUTSIDE OF THE DISTILLATION ZONE TO YIELD A HOT FLUE GAS, AND CIRCULATING SAID HOT FLUE GAS IN HEAT EXCHANGE RELATION WITH THE DISTILLATION RESIDUE PASSING THROUGH SAID HEATING ZONE.

Claim 2

THE METHOD WHICH COMPRISES CONTACTING CARBONACEOUS SOLIDS IN DISTILLATION ZONE WITH SUFFICIENT HOT DISTILLATION RESIDUE FROM PREVIOUSLY DISTILLED CARBONACEOUS SOLIDS, TO RAISE THE TEMPERATURE OF SAID ZONE TO THE POINT WHERE DISTILLATION OF SAID CARBONACEOUS SOLIDS IS EFFECTED TO PRODUCE VOLATILE PRODUCTS AND SOLID DISTILLATION RESIDUE STILL RETAINING VOLATILE COMPONENTS, PASSING AT LEAST A PORTION OF SAID DISTILLATION RESIDUE THROUGH A HEATING ZONE WHICH IS MAINTAINED AT A TEMPERATURE ABOVE THAT OF THE DISTILLATION ZONE, WHEREBY MORE VOLATILE MATTER IS EVOLVED AND THE TEMPERATURE OF THE RESIDUE IS RAISED, RETURNING ONLY THE HEATED DISTILLATION RESIDUE TO THE DISTILLATION ZONE, BURNING A PORTION OF THE DISTILLATION RESIDUE OUTSIDE OF THE DISTILLATION ZONE TO YIELD A HOT FLUE GAS, AND CIRCULATING SAID HOT FLUE GAS IN HEAT EXCHANGE RELATION WITH THE DISTILLATION RESIDUE PASSING THROUGH SAID HEATING ZONE.