skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: 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. 10 figs.

Inventors:
; ;
Issue Date:
Sponsoring Org.:
Los Alamos National Lab., NM (United States)
OSTI Identifier:
644400
Patent Number(s):
5756657
Application Number:
PAN: 8-670,585; CNN: Grant 06-6604
Assignee:
Univ. of Massachusetts, Lowell, MA (United States)
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 26 May 1998
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; PLASTICS; SURFACE CLEANING; CARBON DIOXIDE; SULFUR FLUORIDES; DISSOLUTION; SOLVENTS

Citation Formats

Sawan, S P, Spall, W D, and Talhi, A. Method of cleaning plastics using super and subcritical media. United States: N. p., 1998. Web.
Sawan, S P, Spall, W D, & Talhi, A. Method of cleaning plastics using super and subcritical media. United States.
Sawan, S P, Spall, W D, and Talhi, A. Tue . "Method of cleaning plastics using super and subcritical media". United States.
@article{osti_644400,
title = {Method of cleaning plastics using super and subcritical media},
author = {Sawan, S P and Spall, W D and Talhi, A},
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. 10 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {5}
}