NOVELTY - Converting higher hydrocarbons into lower hydrocarbons comprises providing a feedstock including higher hydrocarbons; converting the feedstock into liquid or liquid slurry; cracking the feedstock, in the presence of a first set of catalysts and at 275-500 degrees C, to produce a cracked feedstock in a gaseous phase; restructuring the cracked feedstock, in the presence of a second set of catalysts, to produce a restructured gaseous product; and condensing the restructured gaseous product to produce a desired end product including lower hydrocarbons.    USE - Method for converting higher hydrocarbons (such as in the form of waste plastics, petroleum sludge, slope oil, or vegetable oil) into lower hydrocarbons (claimed) used as fuels or raw materials for industrial and domestic uses.    ADVANTAGE - The method can be carried out in a continuous manner for improved efficiency and throughput, thus rendering the method suitable for implementation in commercially viable plants.    DETAILED DESCRIPTION - Converting higher hydrocarbons into lower hydrocarbons comprises providing a feedstock including higher hydrocarbons in the form of solid raw material(s) and liquid raw material(s); converting the feedstock into liquid or liquid slurry; cracking the feedstock, in the presence of a first set of catalysts and at 275-500 degrees C, to produce a cracked feedstock in a gaseous phase, where cracking the feedstock includes creating a thin film of the feedstock; restructuring the cracked feedstock, in the presence of a second set of catalysts, to produce a restructured gaseous product; and condensing the restructured gaseous product to produce a desired end product including lower hydrocarbons. An INDEPENDENT CLAIM is included for a cracking device for converting higher hydrocarbons into lower hydrocarbons comprising a jacketed vessel, a blade assembly, and a motor.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a thermo-catalytic cracking system.    Crusher (4)    Inclined chain conveyor (5)    Vessel (7)    Recirculation pump (8)    Heat exchanger (9)