Patent ID: 7626061
Filing Date: 2009-12-01
Classification: C10B,C10G,Y02P

Abstract:
1. A continuous method for the decomposition of waste in the form consisting of scrap tires, waste plastic polymer, rubber and mixtures of such waste into valuable liquid chemicals and/or liquid fuels, said method comprising: shredding said waste, continuously feeding shredded waste scrap into a feed hopper, conveying the waste scrap by screw conveyor in a continuous flow of waste scrap to a tubular or annular reactor; charging said reactor with said waste, heating said waste in said reactor to its decomposition temperature below 850° C. and under atmospheric pressure, to form a reaction mixture, introducing into said reaction mixture a liquid compound containing oxygen and atmospheric air co-current or countercurrent to the continuous flow of waste scrap, while said waste is at its decomposition temperature to thereby at least partially oxidize said waste and utilize heat generated by said oxidation reaction to at least partially maintain said oxidation reaction inside said reactor, and utilizing water formed in said oxidation reaction to prevent deposition of carbon on surfaces inside the reactor, wherein a residence time in the reactor ranges from 3 to 25 min.