Cleaning and liquid contact with solids – Processes – Including regeneration – purification – recovery or separation...
Patent
1992-06-30
1995-03-28
Springer, David B.
Cleaning and liquid contact with solids
Processes
Including regeneration, purification, recovery or separation...
134 1, B08B 704
Patent
active
054013224
ABSTRACT:
Disclosed is an apparatus and method of removing contaminants from an article utilizing a supercritical or near supercritical fluid. The article to be cleaned is first contacted with a fluid in which the contaminant is soluble at a first supercritical or near temperature. The contaminate solubilized fluid is then cooled or heated to a second supercritical or near supercritical temperature to lower the solubility of the contaminant in the supercritical fluid and thereby precipitate the contaminant. The contaminant is then recovered.
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Southwest Research Institute
Springer David B.
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