Patent ID: 6197087
Filing Date: 2001-03-06
Classification: C21B,C22B,Y02P,Y10S

Abstract:
A method of disposing of halogenated organic hazardous wastes utilizing said wastes to accomplish direct reduction of iron oxide in a closed pressurized reduction reactor comprising the steps of:a) supplying said reactor with iron oxide as an iron source;b) supplying a carbon and hydrogen containing, heated, reducing atmosphere by dissociating a short chain hydrocarbon by pyrolysis within the reactor;c) operating the reactor until traces of iron oxide are reduced by said atmosphere to sponge iron and traces of sponge iron are carburized by said atmosphere to iron carbide then;d) introducing into the reactor an alternate reductant supplanting said short chain hydrocarbon, said alternate reductant comprising organic hazardous wastes having associated polluting fractions comprising halogenated hydrocarbons;e) dissociating by pyrolysis, said organic hazardous wastes having polluting fractions in the catalyzing presence of sponge iron, iron carbide and iron oxide in said closed pressurized reactor and of the resulting said carbon and hydrogen containing, heated, reducing atmosphere reducing additional iron oxide to sponge iron and carburizing additional sponge iron to inorganic iron carbide and producing resulting water and inorganic remnants of polluting fractions which are scrubbed from the reducing carburizing atmosphere.