METHOD FOR THERMAL DECOMPOSITION OF POLYVINYLCHLORIDE WASTE Russian patent published in 2015 - IPC C08J11/20 B29B17/04 A62D3/34 

FIELD: chemistry.

SUBSTANCE: invention refers to a method for the thermal decomposition of polyvinylchloride polymer waste. The method of the thermal decomposition of the polyvinylchloride polymer waste involves the stages of grinding the utilisable polymer waste, feeding it into a dehalogenation reactor together with a heavy fraction of oil to produce a mixture of the ground polymer waste and the heavy oil with a mass ratio of 1:0.3-0.8, heating the reaction mixture to a temperature of 210-250°C, producing an acid solution of a halogenated hydrogen gas recovered from the substance, removing this solution, feeding the mixture left in a reactor chamber into a depolymerisation reactor, a temperature of which is increased to a temperature from 480°C to 600°C, extracting the mixed hydrocarbon gas, fractionating it, condensing and placing a portion of the heavy fraction of oil into the dehalogenation reactor back to produce a mixture of polymer chips and heavy oil.

EFFECT: invention enables implementing the cost effective method for preparing a product applicable for energy generation with no additional initial substances used.

5 cl, 3 dwg, 1 tbl, 1 ex