The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 07, 1997
Filed:
Aug. 31, 1995
Masakazu Abe, Machida, Tokyo, JP;
Kiyoshi Murakami, Kagawa-ken, JP;
Mitsui & Co., Ltd., Tokyo, JP;
Other;
Abstract
A method of reclaiming waste polyvinyl chloride according to the present invention includes the steps of bringing industrial waste containing polyvinyl chloride into contact with a solvent in which polyvinyl chloride can be dissolved, to remove polyvinyl chloride from the industrial waste, removing substances which cannot be dissolved in the solvent from a polyvinyl chloride solution consisting of the solvent and the polyvinyl dissolved therein, and recovering reclaimed polyvinyl chloride as a substance left over when the solvent is removed from the polyvinyl solution. The industrial waste to be reclaimed includes polyvinyl chips obtained from waste electric wires, polyvinyl chloride-impregnated wallpaper and used agricultural polyvinyl chloride sheets. The solvent used in the present invention consists of at least one kind of organic solvent selected from the group composed of methyl ethyl ketone, methyl isobutyl ketone and dioctyl phthalate.