METHOD FOR TREATING WASTE CHLORINATED PLASTIC SUCH AS POLYVINYL CHLORIDE

PROBLEM TO BE SOLVED: To provide a process comprising melting and heat-decomposing waste plastics containing a polyvinyl chloride resin and separating the chlorine from the polyvinyl chloride resin as hydrogen chloride, whereby the decomposition gas containing hydrogen chloride remaining in the molt...

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Bibliographische Detailangaben
Hauptverfasser:	ONO TOSHIYUKI, YOKOTA SHIZUO
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS MAKING GRANULES OR PREFORMS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a process comprising melting and heat-decomposing waste plastics containing a polyvinyl chloride resin and separating the chlorine from the polyvinyl chloride resin as hydrogen chloride, whereby the decomposition gas containing hydrogen chloride remaining in the molten plastic being a viscous fluid can be extracted and removed at good efficiency. SOLUTION: In a process for treating waste chlorinated plastics such as a polyvinyl chloride resin by melting and heat-decomposing the plastics at 200 deg.C or above and separating the decomposition gas containing hydrogen chloride from the molten plastics, the molten plastics from which the chloride has been separated is solidified by cooling, and the solidified plastics are broken to separate the decomposition gas containing the hydrogen chloride entrapped in the plastics and to obtain a substantially chlorine-free plastic solid.