Cleaning and liquid contact with solids – Processes – Including regeneration – purification – recovery or separation...
Patent
1992-07-13
1994-12-06
Dees, Jose G.
Cleaning and liquid contact with solids
Processes
Including regeneration, purification, recovery or separation...
134 21, 134 30, 8142, D06L 100, B08B 704
Patent
active
053707427
ABSTRACT:
The invention provides a cleaning method in which a solvent such as densified carbon dioxide can be used for rapid and efficient cleaning, but with decreased damage to solid components such as buttons. The method comprises contacting a substrate to be cleaned with a first fluid, removing the first fluid from contact with the substrate while replacing with a second fluid, and recovering the substrate substantially free of the first and second fluids and from the contaminant. The first fluid is a densified gas while the second fluid is a compressed gas. A preferred embodiment of the method includes the use of a pretreatment designed for compatibility with the densified first fluid.
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Carty Daniel T.
Iliff Robert J.
Kong Stephen B.
Latham James R.
Mitchell James D.
Dees Jos,e G.
Jones Dwayne C.
The Clorox Company
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