Kenneth G Keating

US Patent:

56226144, Apr 22, 1997

Filed:

May 1, 1995

Appl. No.:

8/431605

Inventors:

Kenneth B. Keating - Wilmington DE
James A. Trainham - Newark DE
Clarence G. Law - West Trenton NJ
John S. Newman - Kensington CA
Douglas J. Eames - Chamblee GA

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

C25B 116

US Classification:

205508

Abstract:

The present invention relates to an electrochemical cell and a process for using a halogen halide and splitting a sulfate solution and producing a hydroxide solution, sulfuric acid and a halogen gas. In particular, the sulfate solution may be an alkali metal sulfate solution, such as sodium or potassium sulfate solution, an alkaline earth metal sulfate solution or an ammonium sulfate solution. The cell and the process may use either an anhydrous or an aqueous hydrogen halide, namely, hydrogen chloride, hydrogen fluoride, hydrogen bromide and hydrogen iodide, to a respective dry halogen gas, such as chlorine, fluorine, bromine, or iodine, to produce hydrogen ions in order to split the sulfate solution and form the sulfuric acid. The cell has two membrane-electrode assemblies, where an anode is disposed in contact with one membrane, and a cathode is disposed in contact with another membrane. The sulfate solution is fed in between the membrane-electrode assemblies.

US Patent:

48493031, Jul 18, 1989

Filed:

Apr 29, 1988

Appl. No.:

7/188557

Inventors:

Arthur H. Graham - Chadds Ford PA
Kenneth B. Keating - Wilmington DE

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

H01H 100

US Classification:

428670

Abstract:

A plating bath and process for electroplating coatings of palladium nickel alloys on a conductive substrate at current densities in the range of 10 amps/sq. ft. to 150 amps/sq. ft. wherein the palladium content of the alloy remains substantially constant despite current density variations during plating. The alloy composition stability is achieved by adding at least about 15 parts per million of iodide and/or iodate ions to the plating bath. The as-plated alloy has a thin surface layer which contains iodide at or near the surface.

US Patent:

47433469, May 10, 1988

Filed:

Jul 1, 1986

Appl. No.:

6/880872

Inventors:

Arthur H. Graham - Wilmington DE
Kenneth B. Keating - Wilmington DE

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

C25D 356

US Classification:

204 23

Abstract:

A plating bath and process for electroplating coatings of palladium nickel alloys on a conductive substrate at current densities in the range of 10 amps/sq. ft. to 150 amps/sq. ft. wherein the palladium content of the alloy remains substantially constant despite current density variations during plating. The alloy composition stability is acheived by adding at least about 15 parts per million of iodide ions to the plating bath.

US Patent:

48469416, Jul 11, 1989

Filed:

Apr 1, 1988

Appl. No.:

7/176805

Inventors:

Arthur H. Graham - Chadds Ford PA
Kenneth B. Keating - Wilmington DE

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

C25D 356

US Classification:

204 446

Abstract:

A plating bath and process for electroplating coatings of palladium nickel alloys on a conductive substrate at current densities in the range of 10 amps/sq. ft. to 150 amps/sq. ft. wherein the palladium content of the alloy remains substantially constant despite current density variations during plating. The alloy composition stability is achieved by adding at least about 15 parts per million of iodate ions to the plating bath.

US Patent:

59763469, Nov 2, 1999

Filed:

May 22, 1997

Appl. No.:

8/861558

Inventors:

Francisco Jose Freire - Wilmington DE
Edward Joseph Fahy - Wilmington DE
Dennie Turin Mah - Wilmington DE
Kenneth Bernard Keating - Wilmington DE
Douglas John Eames - Chamblee GA
William H. Zimmerman - Wilmington DE
James Arthur Trainham - Greenville DE
Clarence Garlan Law - West Trenton NJ
John Scott Newman - Kensington CA

Assignee:

E. I. du Pont de Nemours and Company - Wilmington DE

International Classification:

C25B 1500

US Classification:

205349

Abstract:

The present invention relates to an electrochemical cell, system and process for converting essentially anhydrous hydrogen halide to essentially dry halogen gas. The process of the present invention is useful for converting anhydrous hydrogen halide, in particular, hydrogen chloride, hydrogen fluoride, hydrogen bromide and hydrogen iodide, to a halogen gas, such as chlorine, fluorine, bromine, or iodine. In particular, in the present invention, water is provided to the cation-transporting membrane at the cathode in various ways. The present invention allows for recovery of a released fluid at the cathode-side of the membrane and recycling of the released fluid back to the cathode side of the membrane. In this way, the recovered, released fluid may be recycled to continuously supply water to the membrane, thereby allowing the limiting current density of the cell to be increased and/or controlled.

US Patent:

58913190, Apr 6, 1999

Filed:

Dec 23, 1996

Appl. No.:

8/771496

Inventors:

Francisco Jose Freire - Wilmington DE
Kenneth Bernard Keating - Wilmington DE
Edward Kaoru Sakata - Newark DE

Assignee:

E. I. du Pont de Nemours and Company - Wilmington DE

International Classification:

C25B 124
C25B 900

US Classification:

205499

Abstract:

Carbonyl halide is produced from carbon monoxide and halogen produced from the electrochemical conversion of anhydrous hydrogen halide. Both the oxidation of anhydrous hydrogen halide and the formation of carbonyl halide are carried out in the anode-compartment of an electrochemical cell. This reduces the equipment and thus the capital investment necessary for carrying out these reactions. Moreover, no catalyst is needed to form halogen and subsequently make carbonyl halide, as in the prior art. In addition, the health hazards associated with making a carbonyl halide, such as phosgene, at high temperatures from chlorinated hydrocarbons with atmospheric oxygen are virtually eliminated. Furthermore, the halogen produced as a result of the oxidation of anhydrous hydrogen halide are dry, thereby eliminating the need for a preheater before the halogen is reacted with carbon monoxide. Thus, with the present invention, carbonyl halide may be produced more easily, more safely and more inexpensively as compared to prior art processes.

US Patent:

52907619, Mar 1, 1994

Filed:

Oct 19, 1992

Appl. No.:

7/963156

Inventors:

Kenneth B. Keating - Wilmington DE

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

B05D 306
B05D 512

US Classification:

505 1

Abstract:

A process for producing thin films of superconducting material by bombarding a heated target with radiation from pulsed high energy UV laser to form a plume of target material, and depositing the plume on a substrate is disclosed.

US Patent:

58557598, Jan 5, 1999

Filed:

Nov 3, 1997

Appl. No.:

8/962638

Inventors:

Kenneth Bernard Keating - Wilmington DE
James Arthur Trainham - Greenville DE
Clarence Garlan Law - West Trenton NJ
John Scott Newman - Kensington CA

Assignee:

E. I. du Pont de Nemours and Company - Wilmington DE

International Classification:

C25B 100

US Classification:

205508

Abstract:

The present invention relates to an electrochemical cell and a process for producing a hydroxide solution, sulfuric acid and a halogen gas from a hydrogen halide and a sulfate solution. In particular, the sulfate solution may be an alkali metal sulfate solution, such as sodium or potassium sulfate solution, an alkaline earth metal sulfate solution or an ammonium sulfate solution. The cell and the process may use either an anhydrous or an aqueous hydrogen halide, namely, hydrogen chloride, hydrogen fluoride, hydrogen bromide and hydrogen iodide, to a respective dry halogen gas, such as chlorine, fluorine, bromine, or iodine, to produce hydrogen ions in order to split the alkali metal solution and form the sulfuric acid. The cell has two membrane-electrode assemblies, where an anode is disposed in contact with one membrane, and a cathode is disposed in contact with another membrane. The sulfate solution is fed in between the membrane-electrode assemblies.