System for purifying saturated fluoroperhalocarbon liquids
AssigneeMinnesota Mining and Manufacturing Company
InventorsVenkateswarlu Pothapragada, Robert B. Fletcher, Donald F. Hagen, Frederick E. Behr
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Abstract
A method of removing olefinic impurity, such as perfluoroisobutylene, from fluoroperhalocarbon liquid, such as perfluorinated liquid, comprising the step of contacting the fluoroperhalocarbon liquid with a body of particles comprising particles selected from the group consisting of alumina, alkali metal oxide, alkali metal hydroxide, alkaline earth oxide, alkaline earth hydroxide, silicon oxide, tin oxide, zinc oxide, alkaline earth basic carbonate, and alkaline earth basic phosphate, transition metal oxide particles and mixtures thereof.
Claims10
A system for removing olefinic impurity from fluoroperhalocarbon liquid comprising:
- (A) a reservoir containing a liquid comprising fluoroperhalocarbon liquid contaminated with olefinic impurity;
- (B) a cartridge comprising:
- (i) a body of particles comprising particles selected from the group consisting of alumina, alkali metal oxide, alkali metal hydroxide, alkaline earth oxide, alkaline earth hydroxide, silicon oxide, tin oxide, zinc oxide, alkaline earth basic carbonate, and alkaline earth basic phosphate;
- and
- (ii) a housing containing the body of particles, the housing having at least two openings which serve as inlet and outlet ports for fluoroperhalocarbon liquid to enter and exit the housing;
- and
- (C) a means of delivering the liquid to the cartridge where the olefinic impurity is removed from the liquid.
Dependencies are inferred from the claim text.