PROCESS FOR TERMICAL DEGRADATION OF PVC AND OTHER WASTES CONTAINING HALOGEN-CONTAINING POLYMER WASTE

摘要

The subject matter of the patent is a process technology concerning thermal degradation of plastic wastes containing PVC and other plastic waste with halogen content. The patent is characterised by grinding of the plastic waste to be treated, leading it into a dehalogenisation reactor with heavy oil fraction added forming a 1 :0.3-0.8 mass ratio plastic grinding: heavy oil mixture, warming the reaction compound up to a temperature of 210-2500C, an acidic solution is formed from the hydrogen halogen gas liberated from the substance with the known method, it is removed, while the mixture retained in the reactor chamber is forwarded to the de-polymerisation reactor, where temperature is raised to at least 4800C, but kept below 6000C, the hydrocarbon gas mixture generated is extracted, separated into fractions, condensed, and the ratio of the heavy oil fraction referred to above as necessary for the processing of the waste is returned to the dehalogenisation reactor to form a mixture of plastic chippings and heavy oil.