Patent · US Expired

Process for the recovery of valuable materials during the work-up of polyvinyl chloride

US5464876A · kind A · utility

4Cited by

5References

2Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Gunther Lyding · Kelkheim, DE
Maria Pille · Kelkheim, DE
Helmold von Plessen · Kelkheim, DE
Joachim Semel · Eppstein, DE

Key dates

Filing date	Oct 4, 1994
Grant date	Nov 7, 1995
Priority date	—
Expiry date	Oct 4, 2014

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/143
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.