Patent
Method of and apparatus for regenerating waste polyvinyl chloride.
TLDR
In this paper, a method of regenerating waste polyvinyl chloride according to the present invention includes the steps of bringing polyvinylene chloride-containing industrial waste into contact with a solvent in which polyvinel chloride can be dissolved, to elute polyvinl chloride from the industrial waste, removing substances which cannot be dissolved in this solvent from a polyvinylon chloride solution consisting of the solvent and the polyvinil chloride dissolved therein, and recovering regenerated polyvinly chloride as a substance left over when the solvent is removed from the polymineral solution.Abstract:
A method of regenerating waste polyvinyl chloride according to the present invention includes the steps of bringing polyvinyl chloride-containing industrial waste into contact with a solvent in which polyvinyl chloride can be dissolved, to elute polyvinyl chloride from the industrial waste, removing substances which cannot be dissolved in this solvent from a polyvinyl chloride solution consisting of the solvent and the polyvinyl chloride dissolved therein, and recovering regenerated polyvinyl chloride as a substance left over when the solvent is removed from the polyvinyl solution. The industrial waste to be regenerated includes polyvinyl chloride chips obtained from waste electric wires, polyvinyl chloride-impregnated wall paper 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.read more
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Patent
Method for removing insoluble matter from polyvinyl chloride resin solution
TL;DR: In this paper, the authors proposed a method for removing insoluble matter from a polyvinyl chloride resin solution, which consisted in bringing a waste PCL resin composition A into contact with a good solvent for to a PU resin and dissolving the PU resins to give a PU solvated solution C, introducing the solution to a first filter 13 to separate the solution into a residue and a filtered dissolved solution F, recovering the residue attached to the first filter by using a good solvate G for a PU resin, introducing an obtained mixture H of the residue and
Patent
Method for treating plastics and solid fuel obtained by the same method
Tatsuya Nobusawa,Suzuki Toshihide,Kimihiro Nishimura,Makiko Ijiri,Masahiko Tada,Masafumi Komatsu +5 more
TL;DR: In this article, the authors proposed a method for treating plastics, which is feasible on plastics containing films mixed therein, and which provides processed plastics capable of being easily size-reduced.
Patent
Flash recovery of plastics capable of being dissolved or dispersed in solvents
TL;DR: In this paper, a heat exchanger system at temperatures of 130 deg C-400 deg C is used to separate solvents and plastic almost completely, each being recovered in a virtually pure state.
References
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Patent
Method for reclaiming commercially useful fibers and resin from scrap material
TL;DR: In this paper, scratch fabrics supported synthetic resin are first washed with solvent under controlled heat, pressure and agitation to produce as a first product clean, dried, resin and solvent free fibers.
Patent
Solvent reclaiming of synthetic resins
TL;DR: In this article, synthetic resins and polyvinyl chloride are reclaimed by pouring thereover a mixture of organic solvents containing trichlorethylene and dimethyl sulfoxide as the essential solvent, and the material being reclaimed is held in an autoclave at a pressure of at least 5 p.i.s.
Patent
Production of jelly-like pvc composition
TL;DR: In this article, a suspension is formed by adding 100pts.wt.polyvinyl chloride resin material to 150W 1,200pts liquid plasticizer and stirring the mixture by means of an agitator to disperse it uniformly.
Patent
A Method of Separating Metal and Plastics Material.
TL;DR: In this paper, the metal is recovered from a composite body comprising plastics material (such as plastics covered copper cable or wire) by treating the body with a solvent or softening agent for the plastics and then separating the metal from the dissolved or softened plastics material.
Patent
Process for recycling of contaminated PVC.
TL;DR: In this article, a method for recovering PVC from a material comprising PVC and at least one non-PVC component is provided. But this method is not suitable for the case of non-pVC components.