METHOD FOR RECOVERING POLYVINYL CHLORIDE FROM WASTE VINYL CHLORIDE RESIN COMPOSITION
PROBLEM TO BE SOLVED: To provide a method for recovering a vinyl chloride resin from a waste vinyl chloride resin composition, which has a low load of installation cost, uses a safer solvent, needs no energy, is efficient and freely separately forms its recovered resin forms. SOLUTION: This method f...
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| creator | YOKOYAMA KAZUYUKI ISOTANI SHINJI |
| description | PROBLEM TO BE SOLVED: To provide a method for recovering a vinyl chloride resin from a waste vinyl chloride resin composition, which has a low load of installation cost, uses a safer solvent, needs no energy, is efficient and freely separately forms its recovered resin forms. SOLUTION: This method for recovering the polyvinyl chloride from the waste vinyl chloride resin composition comprises (a) a dissolution process for dissolving the waste vinyl chloride resin composition in a solvent to dissolve the polyvinyl chloride to give a polyvinyl chloride solution, (b) a precipitation process for mixing the obtained polyvinyl chloride solution with water to precipitate the polyvinyl chloride and (c) a separation process for separating the precipitated polyvinyl chloride. These processes are carried out in the order of (a), (b) and (c). COPYRIGHT: (C)2005,JPO&NCIPI |
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SOLUTION: This method for recovering the polyvinyl chloride from the waste vinyl chloride resin composition comprises (a) a dissolution process for dissolving the waste vinyl chloride resin composition in a solvent to dissolve the polyvinyl chloride to give a polyvinyl chloride solution, (b) a precipitation process for mixing the obtained polyvinyl chloride solution with water to precipitate the polyvinyl chloride and (c) a separation process for separating the precipitated polyvinyl chloride. These processes are carried out in the order of (a), (b) and (c). 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SOLUTION: This method for recovering the polyvinyl chloride from the waste vinyl chloride resin composition comprises (a) a dissolution process for dissolving the waste vinyl chloride resin composition in a solvent to dissolve the polyvinyl chloride to give a polyvinyl chloride solution, (b) a precipitation process for mixing the obtained polyvinyl chloride solution with water to precipitate the polyvinyl chloride and (c) a separation process for separating the precipitated polyvinyl chloride. These processes are carried out in the order of (a), (b) and (c). 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| subjects | 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 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 |
| title | METHOD FOR RECOVERING POLYVINYL CHLORIDE FROM WASTE VINYL CHLORIDE RESIN COMPOSITION |
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