3m Innovative Properties Company

Minnesota Mining and Manufacturing Company

Glenn Delmont Johnson

Donald F Hagen

Yuri Cheburkov

Fred Lynn DeRoos

Mark Eugene Mueller

Venkateswarlu Pothapragada

John Stephen Marhevka

Kenneth M Hart

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

An efficient method removes oxidants from fluids (gases and liquids, particularly air) by means of solid phase extraction or reaction. The solid phase extraction or reaction medium comprises a porous, preferably fibrous, polymeric, membrane or web in which are incorporated oxidant scavenger particulates. Typical oxidants removed in the method include ozone, oxides of nitrogen, halogen, and peroxides. The method of the invention protects organic analytes in analytical applications and removes oxidants in remediation applications by use of oxidant scavenger particles in porous membranes.

Particle loaded membranes as oxidant scavengers

Growing community of inventors

Mahtomedi, MN, United States of America

Glenn Delmont Johnson