Process for recycling plastic waste
US5780696A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 24, 1997 |
| Grant date | Jul 14, 1998 |
| Priority date | — |
| Expiry date | Feb 24, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a process for recycling waste which consists essentially of one or more plastics comprising polyvinyl chloride (PVC), in which: PA1 the waste is mixed with a heavy oil, in a reactor under an inert atmosphere, at an internal temperature of at least 300.degree. C., and the hydrogen chloride (HCl) which is evolved is collected; PA1 the contents of the reactor are then cracked at a temperature of at least 400.degree. C., and at least part of the gases which are evolved are extracted from the reactor; PA1 the contents of the reactor are then cooled and the residual solid product is collected. HCl, coke, hydrocarbon gases and various oils are thus mainly obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.