E.i. Dupont De Nemours and Company

Richard E Fernandez

Wendel R Cassel

Viacheslav Alexandrovich Petrov

David Richard Corbin

Robert Clayton Wheland

V N Rao

Paul R Resnick

Paul Raphael Resnick

Frederick W Mader

Nina Ivanova Delyagina

Victor Filippovich Cherstkov

Daniel W Moore

Alfred P Dougherty, Jr

Barry Asher Mahler

Mark B Shiflett

Weiming Qiu

Vinci Martinez Felix

Donald Bernard Bivens

William H Gumprecht

Tuneen Chisolm-Carter

Mark Harry Krackov

Charles C Seastrom

Nina Ivanovna Delyagina

Kaplan, Ralph B

Ralph B Kaplan

Hexafluoroisobutylene and its higher homologs are easily reacted with SOto give fluorosulfates of the formula CH&#x2550;C(R)CFOSOF, wherein R is a linear branched or cyclic fluoroalkyl group comprised of 1 to 10 carbon atoms and may contain ether oxygen. These compounds react under mild conditions with many nucleophiles to give CH&#x2550;C(R)CFX, where X is derived from the nucleophile. This reaction provides a route to many substituted hexafluoroisobutylenes, which copolymerize easily with other fluoro- and hydrocarbon monomers such as vinylidene fluoride and ethylene.

Fluorosulfates of hexafluoroisobutylene and its higher homologs and their derivatives

Hexafluoroisobutylene and its higher homologs are easily reacted with SOto give fluorosulfates of the formula CH&#x2550;C(R)CFOSOF, wherein R is a linear, branched or cyclic fluoroalkyl group comprised of 1 to 10 carbon atoms and may contain ether oxygen. These compounds react under mild conditions with many nucleophiles to give CH&#x2550;C(R)CFX, where X is derived from the nucleophile. This reaction provides a route to many substituted hexafluoroisobutylenes, which copolymerize easily with other fluoro- and hydrocarbon monomers such as vinylidene fluoride and ethylene.

Fluorosulfates of hexafluoroisobutylene and its higher homologs

1,1,1,3,3,3-Hexafluoropropane is disclosed as a refrigerant.

Use of 1,1,1,3,3,3-Hexafluoropropane in centrifugal compressors

Process is disclosed for preparing a highly fluorinated alkane by contacting halogenated alkenes or alkanes with hydrogen fluoride in the presence of a catalyst which produces a super acid environment. Also, performing the fluorination process by using equipment having a corrosion resistant surface. The corrosion resistant surface may be provided by explosively cladding a corrosion resistant material onto a base metal.

Corrosion resistant equipment for manufacturing highly fluorinated

Purification of hexafluoroethane products

A process for reducing the content of unsaturated impurities in saturated fluorohalocarbons and fluorohalohydrocarbons by contacting the impure saturated fluorohalocarbon and/or fluorohalohydrocarbon in a substantially dry fluid state with a substantially dry amorphous solid metal oxide composition consisting essentially of cupric oxide, cobaltic oxide, silver oxide, manganese dioxide, or a mixture of any two or more thereof, at an effective temperature up to about 300.degree. C.

Purification of saturated halocarbons

A process for extinguishing, preventing and controlling fires using a composition containing at least one fluoro-substituted propane selected from the group of 2,2-dichloro-1,1,1-trifluoroethane (CHCl.sub.2 CF.sub.3), 2-chloro-1,1,1,2-tetrafluoroethane (CHClFCF.sub.3), and 1,1,1,2-tetrafluoroethane (CH.sub.2 FCF.sub.3), and mixtures thereof is disclosed. The fluoropropanes can be used in open or enclosed areas with little or no effect on the ozone in the stratosphere and with little effect on the global warming process.

Fire extinguishing composition and process

A process for halogen exchange fluorination or fluoro-denitration of aromatic compounds having at least one replaceable non-fluorine halogen or nitro substituent with an anhydrous substantially molten alkali metal acid fluoride composition wherein the alkali metal is potassium, rubidium or cesium.

Aromatic nucleophilic fluorination

A process for the dehydrohalogenation of saturated hydrogen-containing polyhalocarbons using liquid alkali metal acid fluoride and/or alkali metal fluoride compositions to form haloolefins.

Dehydrohalogenation process

A process for extinguishing, preventing and controlling fires using a composition containing at least one fluoro-substituted ethane selected from the group of CF.sub.3 --CHF.sub.2, CHF.sub.2 --CHF.sub.2, CF.sub.3 --CH.sub.2 F, CF.sub.3 --CHFCl, CF.sub.2 Cl--CHF.sub.2, CF.sub.3 --CHCl.sub.2, CF.sub.2 Cl--CHFCl, CFCl.sub.2 --CHF.sub.2, and CHFCl--CHFCl is disclosed. The ethane can be used in open or enclosed areas with little or no effect on the ozone in the stratosphere and with little effect on the global warming process.

A process for extinguishing, preventing and/or controlling fires using a composition containing CHF.sub.3 is disclosed. CHF.sub.3 can be used in volume percentages with air as high as 80% without adversely affecting mammalian habitation, with no effect on the ozone in the stratosphere and with little effect on the global warming process.

A process for extinguishing, preventing and controlling fires using a composition containing at least one fluoro-substituted propane selected from the group of CF.sub.3 --CHF--CF.sub.3, CF.sub.3 --CF.sub.2 --CHF.sub.2, CF.sub.3 --CFH--CF.sub.2 H, CF.sub.3 --CH.sub.2 --CF.sub.3, CF.sub.3 --CF.sub.2 --CH.sub.2 F, CHF.sub.2 --CF.sub.2 --CHF.sub.2, CF.sub.3 --CF.sub.2 --CHCl.sub.2, CHFCl--CF.sub.2 --CClF.sub.2, CHF.sub.2 --CCl.sub.2 --CF.sub.3, CF.sub.3 --CHCl--CClF.sub.2, CHF.sub.2 --CF.sub.2 --CHClF, CF.sub.3 --CR.sub.2 --CH.sub.2 Cl, CClF.sub.2 --CF.sub.2 --CH.sub.2 F, CF.sub.3 --CH.sub.2 --CClF.sub.2, CHClF--CR.sub.2 --CF.sub.3, CHF.sub.2 --CF.sub.2 --CF.sub.2 Cl, CF.sub.3 --CHCl--CF.sub.3, CF.sub.3 --CHF--CF.sub.2 Cl, and CHF.sub.2 --CFCl--CF.sub.3 is disclosed. The fluoropropanes can be used in open or enclosed areas with little or no effect on the ozone in the stratosphere and with little effect on the global warming process.

A process for fluorination by contacting a haloolefin with molten alkali metal acid fluoride to provide a fluorinated saturated or unsaturated hydrocarbon having at least one more fluorine than the starting haloolefin.

Fluorination of haloolefins

A process for extinguishing, preventing and controlling fires using a composition containing CHF.sub.3 is disclosed. CHF.sub.3 can be used in volume percentages with air as high as 80% without adversely affecting mammalian habitation, with no effect on the ozone in the stratosphere and with little effect on the global warming process.

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Bear, DE, United States of America

Richard E Fernandez