E.i. Dupont De Nemours and Company

E. I. Du Pont Nemours and Co.

Akimichi Yokozeki

Mark B Shiflett

Donald Bernard Bivens

Philip L Bartlett

Brooks Shawn Lunger

Barbara Haviland Minor

Abid N Merchant

Allen Capron Sievert

Thomas Joseph Leck

Jeffrey P Knapp

Joseph A Creazzo

Robert A Gorski

Diana Lynn Klug

Tuneen E Chisolm

David John Van Bramer

Janet C Sung

Helen A Connon

William G Kenyon

Mark Brandon Shiflett

Foams of ionic compounds are described. Methods of making the foams are also provided. The foams are ionic and can be used for catalysis, separations, gas storage, biosensors, electronics, and electrochemical applications.

Foamed ionic compounds

The present invention relates to compositions for use in refrigeration, air-conditioning, and heat pump systems wherein the composition comprises 2,3,3,3-tetrafluoropropene (HFC-1234yf) and at least one hydrocarbon. The compositions of the present invention are useful in processes for producing cooling or heat, as heat transfer fluids, foam blowing agents, and aerosol propellants.

Compositions comprising 2,3,3,3-tetrafluoropropene and hydrocarbons and uses thereof

A process and a reactor system for producing ammonia is described. The ammonia produced, such as by the Haber process, is absorbed into an ionic liquid. The removal of ammonia shifts the reaction equilibrium toward the production of ammonia, resulting in higher yields of ammonia.

Process and reactor system for producing ammonia using ionic liquids

This invention relates to a process for purifying at least one of perfluoromethane and nitrogen trifluoride from a mixture thereof using an ionic liquid. The process may be performed by a technique such as extractive distillation or absorption wherein at least one ionic liquid is used as the entraining agent or absorbent, respectively.

Process for purifying perfluorinated products

The present invention relates to an absorption cycle comprising a refrigerant pair comprising at least one refrigerant and at least one ionic liquid. The present invention also provides an absorption cycle that utilizes fluorocarbon gases in fluorinated ionic liquids. The present invention also provides a method of cooling using an absorption cycle comprising a refrigerant pair comprising at least one refrigerant and at least one ionic liquid. The present invention also provides a method of heating using an absorption cycle comprising a refrigerant pair comprising at least one refrigerant and at least one ionic liquid.

Absorption cycle utilizing ionic liquid as working fluid

The present invention relates to a hybrid vapor compression&#x2014;absorption cooling or heating system and apparatus containing a refrigerant pair comprising at least one refrigerant and at least one ionic liquid. The present invention also provides for the performance of a hybrid vapor compression&#x2014;absorption cycle that utilizes refrigerants and absorbents such as fluorocarbon gases in fluorinated ionic liquids. The present invention also provides a method of cooling by the execution of a hybrid vapor compression&#x2014;absorption cycle using a refrigerant pair comprising at least one refrigerant and at least one ionic liquid. The present invention also provides a method of heating by the execution of a hybrid vapor compression&#x2014;absorption cycle using a refrigerant pair comprising at least one refrigerant and at least one ionic liquid.

Hybrid vapor compression-absorption cycle

The present invention relates to a process for separating close-boiling and azeotropic components of mixtures, wherein said mixtures contain at least one hydrofluorocarbon compound, using at least one ionic liquid.

Utilizing ionic liquids for hydrofluorocarbon separation

This invention relates to the use of ionic liquids as lubricants in vapor compression systems for cooling or heating. This invention also relates to an apparatus for adjusting temperature that operates a vapor compression cycle.

Vapor compression cycle utilizing ionic liquid as compressor lubricant

This invention relates to a composition comprising water and at least one ionic liquid, and also to devices capable of executing an absorption cycle using such compositions as a refrigerant pair. This invention also provides a method of cooling using an absorption cycle comprising water as the refrigerant and at least one ionic liquid as the absorbent. The present invention also provides a method of heating using an absorption cycle comprising water as the refrigerant and at least one ionic liquid.

Absorption cycle utilizing ionic liquids and water as working fluids

A process for separating tetrafluoroethylene from a mixture comprising tetrafluoroethylene and carbon dioxide by contacting the mixture with at least one ionic liquid.

Process for separation of tetrafluoroethylene from carbon dioxide using ionic liquids

A process for separating the diastereomers of a compound such as dihydrodecafluoropentane by using an ionic liquid to increase separation efficiency. The process may involve separation of the threo and erythro diastereomers of HFC-4310mee by liquid-liquid extraction wherein at least one ionic liquid is used as the extractant.

Process for the separation of diastereomers

This invention relates to a process for separating 1,1,2,2-tetrafluoroethane or 1,1,1,2-tetrafluoroethane from a mixture comprising both 1,1,1,2-tetrafluoroethane and 1,1,2,2-tetrafluoroethane wherein at least one ionic liquid is used to enhance the efficiency of the separation.

Process for the separation of fluorocarbons using ionic liquids

The present invention relates to a hybrid vapor compression-absorption cooling or heating system and apparatus containing a refrigerant pair comprising at least one refrigerant and at least one ionic liquid. The present invention also provides for the performance of a hybrid vapor compression-absorption cycle that utilizes refrigerants and absorbents such as fluorocarbon gases in fluorinated ionic liquids. The present invention also provides a method of cooling by the execution of a hybrid vapor compression-absorption cycle using a refrigerant pair comprising at least one refrigerant and at least one ionic liquid. The present invention also provides a method of heating by the execution of a hybrid vapor compression-absorption cycle using a refrigerant pair comprising at least one refrigerant and at least one ionic liquid.

The present invention relates to azeotrope-like compression refrigerant compositions consisting essentially of difluoromethane (HFC-32), pentafluoroethane (HFC-125), 1,1,1,2-tetrafluoroethane (HFC-134 ) and 0.5-5 weight percent of a hydrocarbon selected from the group consisting of: n-butane; isobutane; n-butane and 2-methylbutane; n-butane and n-pentane; isobutane and 2-methylbutane; and isobutane and n-pentane.

Compositions of difluoromethane, pentafluoroethane, 1,1,1,2-tetrafluoroethane and hydrocarbons

Disclosed are ternary azeotropic, azeotrope-like, and zeotropic compositions of ammonia, pentafluoroethane and difluoromethane. These compositions are useful as refrigerants, and particularly as high capacity and efficiency alternatives to binary mixtures of difluoromethane and pentafluoroethane.

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Wilmington, DE, United States of America

Akimichi Yokozeki