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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.

Inventors:
 [1];  [2];  [3]
  1. Tyngsborough, MA
  2. Los Alamos, NM
  3. Nashua, NH
Issue Date:
Research Org.:
Los Alamos National Lab. (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 C08J - WORKING-UP
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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 = {1998},
month = {5}
}

Patent:

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