Method of cleaning plastics using super and subcritical media
Patent
·
OSTI ID:644400
A method for treating a plastic, such as polyethylene or polypropylene, to remove at least a portion of at least one contaminant includes combining the plastic with a supercritical medium, such as carbon dioxide or sulfur hexafluoride, whereby at least a portion of the contaminant dissolves in the supercritical medium. Alternatively, the plastic can be combined with a suitable liquid medium, such as carbon dioxide or liquid sulfur hexafluoride. At least a portion of the medium, containing the dissolved contaminant, is separated from the plastic, thereby removing at least a portion of the contaminant from the plastic. 10 figs.
- Sponsoring Organization:
- Los Alamos National Lab., NM (United States)
- Assignee:
- Univ. of Massachusetts, Lowell, MA (United States)
- Patent Number(s):
- US 5,756,657/A/
- Application Number:
- PAN: 8-670,585; CNN: Grant 06-6604
- OSTI ID:
- 644400
- Resource Relation:
- Other Information: PBD: 26 May 1998
- Country of Publication:
- United States
- Language:
- English
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