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Patent Searching and Data


Title:
METHOD FOR RECOVERING POLYVINYL CHLORIDE
Document Type and Number:
Japanese Patent JP2008174666
Kind Code:
A
Abstract:

To provide a method for efficiently removing heavy metals contained in a waste vinyl chloride resin composition in low energy by a solvent having little load of facility cost and being safer and recovering a polyvinyl chloride.

The method for recovering the polyvinyl chloride comprises bringing a polymer solution obtained by dissolving the waste vinyl chloride resin composition in an organic solvent into contact with an adsorbent selected from a zeolite and a chelate resin and then removing heavy metals from the polymer solution by solid-liquid separation. According to the recovery method, soluble heavy metals which have been hard to separate by conventional separation treatments, etc., are removed.


Inventors:
YOKOYAMA KAZUYUKI
Application Number:
JP2007010715A
Publication Date:
July 31, 2008
Filing Date:
January 19, 2007
Export Citation:
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Assignee:
MITSUBISHI CHEM CORP
International Classes:
C08J11/08; B01J20/18; B01J20/28; B01J45/00
Attorney, Agent or Firm:
Takeshi Senda
Jiro Kobe