METHOD FOR CLEANING AN ARTICLE

A method for cleaning an article includes the steps of contacting the article with a solvent fluid that includes carbon dioxide, whereby contaminants on the article dissolve in the solvent fluid and displacing the solvent fluid with a displacing fluid, that is other than carbon dioxide. In one aspec...

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Bibliographische Detailangaben
1. Verfasser:	BILLINGHAM, JOHN, FREDRIC
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES BASIC ELECTRIC ELEMENTS CANDLES CHEMISTRY CLEANING CLEANING IN GENERAL DETERGENT COMPOSITIONS DETERGENTS ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRICITY FATTY ACIDS THEREFROM METALLURGY PERFORMING OPERATIONS PREVENTION OF FOULING IN GENERAL RECOVERY OF GLYCEROL RESIN SOAPS SEMICONDUCTOR DEVICES SOAP OR SOAP-MAKING TRANSPORTING USE OF SINGLE SUBSTANCES AS DETERGENTS
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Beschreibung
Zusammenfassung:	A method for cleaning an article includes the steps of contacting the article with a solvent fluid that includes carbon dioxide, whereby contaminants on the article dissolve in the solvent fluid and displacing the solvent fluid with a displacing fluid, that is other than carbon dioxide. In one aspect, the displacing fluid is at a temperature and pressure sufficient to prevent forming a second phase in the solvent fluid being displaced and at least a portion of the carbon dioxide is recycled to the article. In another aspect, the pressure of the solvent fluid is reduced prior to its displacement with the displacing gas.