Process for the recovery of valuable materials during the work-u

Details Process for the recovery of valuable materials during the work-u Process for the recovery of valuable materials during the work-u

1994-10-04

1995-11-07

Krass, Frederick

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Process of treating scrap or waste product containing solid...

560 78, 201 3, 201 4, 201 17, 201 21, 201 22, 201 25, 201 28, 201 29, 201 30, 201 36, C10B 5300

Patent

active

054648769

ABSTRACT:
Heating of polyvinyl chloride, in particular plasticizer-containing polyvinyl chloride, to a temperature of from 250.degree. to 500.degree. C. in the absence of oxygen gives a low-chlorine, carbon-containing residue, plasticizer and hydrogen chloride.

REFERENCES:
patent: 3716339 (1973-02-01), Shigaki et al.
patent: 3829558 (1974-08-01), Banks et al.
patent: 4515659 (1985-05-01), Wingfield et al.
patent: 4746406 (1988-05-01), Timmann
patent: 5292429 (1994-03-01), DesOrmeaux
Database WPI Week 7423, Derwent Publications Ltd., London, GB; An 74-42243V & JP-A-48 067 190 (Chiba Inst Technology) Sep. 13, 1973.
Database WPI Week 7742, Derwent Publications, Ltd., London, GB; An 77-74665Y & JP-A-50 123 190 (Fujikura Cable Works).

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