Method of cleaning plastics using super and subcritical media
Abstract
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.
- Inventors:
-
- Tyngsborough, MA
- Los Alamos, NM
- Nashua, NH
- Issue Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- OSTI Identifier:
- 871572
- Patent Number(s):
- 5756657
- Application Number:
- 08/670,585
- Assignee:
- University of Massachusetts Lowell (Lowell, MA)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08F - MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08J - WORKING-UP
- DOE Contract Number:
- 06-6604
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- method; cleaning; plastics; super; subcritical; media; treating; plastic; polyethylene; polypropylene; remove; portion; contaminant; combining; supercritical; medium; carbon; dioxide; sulfur; hexafluoride; whereby; dissolves; alternatively; combined; suitable; liquid; containing; dissolved; separated; removing; sulfur hexafluoride; carbon dioxide; liquid medium; /528/
Citation Formats
Sawan, Samuel P, Spall, W Dale, and Talhi, Abdelhafid. Method of cleaning plastics using super and subcritical media. United States: N. p., 1998.
Web.
Sawan, Samuel P, Spall, W Dale, & Talhi, Abdelhafid. Method of cleaning plastics using super and subcritical media. United States.
Sawan, Samuel P, Spall, W Dale, and Talhi, Abdelhafid. Tue .
"Method of cleaning plastics using super and subcritical media". United States. https://www.osti.gov/servlets/purl/871572.
@article{osti_871572,
title = {Method of cleaning plastics using super and subcritical media},
author = {Sawan, Samuel P and Spall, W Dale and Talhi, Abdelhafid},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 26 00:00:00 EDT 1998},
month = {Tue May 26 00:00:00 EDT 1998}
}