3m Innovative Properties Company

Minnesota Mining and Manufacturing Company

Venkateswarlu Pothapragada

Donald F Hagen

Yuri Cheburkov

Fred Lynn DeRoos

Mark Eugene Mueller

John Stephen Marhevka

Glenn Delmont Johnson

Frederick E Behr

Robert B Fletcher

Fluoroalkene-nucleophile adducts for analysis and removal of fluoroalkenes

A method for removing one or more fluorinated alkenes from a fluid comprises the step of contacting the fluid with an N-, S-, or P-containing nucleophile for a time sufficient to form an N-, S-, or P-containing nucleophile-fluoroalkene adduct. The nucleophile, and therefore the adduct, can be covalently bonded, coated or sorbed to a particulate support which can be enmeshed in a porous, fibrous web. In a preferred embodiment the fluorinated alkene can have the formula ##STR1## wherein A=F or R.sub.f ; X=H, F, Cl, R.sub.f, or YR.sub.f ; Z=H, F, Cl, or R.sub.f ; and Y=O, N, or S; with the proviso that at least one A=F, and at most one of Z and X is H; wherein each R.sub.f is independently selected from the group consisting of highly fluorinated or perfluorinated alkyl groups; and a combination of any two R.sub.f groups can be linked to form a cyclic structure. The R.sub.f alkyl chains may contain from 1-20 carbon atoms, with 1-12 carbon atoms preferred. The R.sub.f alkyl chains may be straight, branched, or cyclic. Preferably, R.sub.f is CF.sub.3, C.sub.2 F.sub.5, or C.sub.3 F.sub.7.

Fluoroalkene-nucleophile adducts for analysis and removal of

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.

System for purifying saturated fluoroperhalocarbon liquids

Method of purifying saturated fluoroperhalocarbon liquids

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Minneapolis, MN, United States of America

Venkateswarlu Pothapragada