Method for recycling polyethylene terephthalate (PET) beverage bottles by treating with carbon dioxide
US5073203A · kind A · utility
32Cited by
3References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 31, 1990 |
| Grant date | Dec 17, 1991 |
| Priority date | — |
| Expiry date | Oct 31, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/62
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for recycling polyethyleneterephthalate beverage bottles comprises the removal of the contaminants with the use of supercritical carbon dioxide. The recycled material is placed in an autoclave and treated with carbon dioxide at a temperature greater than 31.degree. C. and a pressure greater than 50 bars.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.