Organic compounds -- part of the class 532-570 series – Organic compounds – Halogen containing
Patent
1998-09-16
2000-11-14
Richter, Johann
Organic compounds -- part of the class 532-570 series
Organic compounds
Halogen containing
570177, 2105021, 210503, 210504, C07C 1738, B01D 3900, B01D 2400
Patent
active
061472689
ABSTRACT:
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.
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Cheburkov Yuri
DeRoos Fred Lynn
Hagen Donald Frederick
Johnson Glenn Delmont
Marhevka John Stephen
3M Innovative Properties Company
Dahl Philip Y.
Parsa J.
Richter Johann
Sherman Lorraine R.
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