Cleaning and liquid contact with solids – Processes – Using sequentially applied treating agents
Patent
1992-02-25
1994-04-19
Morris, Theodore
Cleaning and liquid contact with solids
Processes
Using sequentially applied treating agents
134 31, 134 40, 134 12, 134 21, B08B 300, B08B 302, B08B 500, B08B 504
Patent
active
053042530
ABSTRACT:
A method is provided for cleaning an article with a solvent having a boiling point such that the solvent is a gas at room temperature and one atmosphere pressure. Such a method includes the steps of disposing the article in a chamber, introducing the solvent into the chamber so that the solvent contacts the article, pressurizing the chamber so that the solvent is in a liquid state and removes contaminants from the article, purging the chamber to remove the solvent, and removing the treated article from the chamber. Such a system permits the use of liquids having boiling points lower than room temperature, such as certain C.sub.1 -C.sub.4 halocarbons, which liquids have not previously been used as cleaning solvents.
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Barry Ronald E.
Baxter International Inc.
El-Arini Zeinab
Flattery Paul C.
Mattenson Charles R.
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