Patents by Inventor Paul Nicholas Ewing
Paul Nicholas Ewing has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6767394Abstract: A composition comprising a dye of Formula (I) and a dye of Formula (II) or salts thereof, and use of the composition in ink jet printingType: GrantFiled: September 4, 2002Date of Patent: July 27, 2004Assignee: Avecia LimitedInventors: Andrew Paul Shawcross, Mark Holbrook, Paul Nicholas Ewing
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Publication number: 20040073072Abstract: Prior to carrying out a gaseous phase chemical reaction, a liquid phase organic compound which is prone to degrade is vaporised at elevated pressures with the aid of a second compound. In one embodiment of the invention, vaporisation is effected by co-vaporising a mixture of the two compounds in a vaporiser. In another embodiment, the first compound is injected into a hot gaseous stream and undergoes atomisation into droplets which then vaporise within the gaseous stream. The second compound is used to assist the atomisation process and/or to sweep atomised droplets of the first compound away from hot surfaces where the first compound would otherwise tend to undergo degradation if the droplets are allowed to reside in contact with such surfaces.Type: ApplicationFiled: July 18, 2003Publication date: April 15, 2004Inventors: John David Scott, Charles Brian Blake, Paul Nicholas Ewing, Jeremy Charles Bauser Hunns, Steven Toplis, Andrew Neil Irwin, Mark Spruce
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Patent number: 6660893Abstract: A process for separating and recovering hydrogen fluoride from a mixture with an organic compound especially a fluorine-containing compound by extraction with a solution of an alkali metal fluoride in hydrogen fluoride, phase separation and recovery. A process for producing a fluorine-containing organic compound by fluorinating a starting material with hydrogen fluoride and similarly recovering hydrogen fluoride from the product stream. The solution may be anhydrous or aqueous.Type: GrantFiled: June 5, 2001Date of Patent: December 9, 2003Assignee: Ineca Fluor Holdings LimitedInventors: Paul Nicholas Ewing, Charles John Shields, Christopher Roberts
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Patent number: 6660130Abstract: Prior to carrying out a gaseous phase chemical reaction, a liquid phase organic compound which is prone to degrade is vaporized at elevated pressures with the aid of a second compound which together with the organic compound produces a mixture having a boiling point less than that of the organic compound. In one embodiment of the invention, vaporization is effected by co-vaporizing a mixture of the two compounds in a vaporiser. In another embodiment, the first compound is injected into a hot gaseous stream and undergoes atomization into droplets which then vaporize within the gaseous stream. The second compound is used to assist the atomization process and/or to sweep atomized droplets of the first compound away from hot surfaces where the first compound would otherwise tend to undergo degradation if the droplets are allowed to reside in contact with such surfaces.Type: GrantFiled: April 11, 2001Date of Patent: December 9, 2003Assignee: Ineos Fluor Holdings LimitedInventors: John David Scott, Charles Brian Blake, Paul Nicholas Ewing, Jeremy Charles Bauser Hunns, Steven Toplis, Andrew Neil Irwin, Mark Spruce
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Publication number: 20030176533Abstract: A process for ink-jet printing an image on a substrate comprising applying thereto a composition comprising:Type: ApplicationFiled: February 21, 2003Publication date: September 18, 2003Inventors: David Cottrell, Paul Nicholas Ewing, Paul Francis Mahon, Richard John Cordwell, Stephen George Yeates
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Publication number: 20030136301Abstract: A composition comprising a dye of Formula (I) and a dye of Formula (II) or salts thereof, and use of the composition in ink jet printing.Type: ApplicationFiled: September 4, 2002Publication date: July 24, 2003Inventors: Andrew Paul Shawcross, Mark Holbrook, Paul Nicholas Ewing
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Patent number: 6555086Abstract: Processes for separating and recovering hydrogen fluoride from a gaseous mixture of an organic compound and hydrogen fluoride are disclosed. The processes include contacting the gaseous mixture with a solution of an alkali metal fluoride in hydrogen fluoride, separating a gas phase depleted in hydrogen fluoride and containing the organic compound from a liquid phase, and recovering hydrogen fluoride from the liquid phase.Type: GrantFiled: October 7, 1999Date of Patent: April 29, 2003Assignee: Ineos Fluor Holdings LimitedInventors: Paul Nicholas Ewing, Charles John Shields, Robert Elliott Low
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Publication number: 20020168315Abstract: A process for separating and recovering hydrogen fluoride from a mixture with an organic compound especially a fluorine-containing compound by extraction with a solution of an alkali metal fluoride in hydrogen fluoride, phase separation and recovery. A process for producing a fluorine-containing organic compound by fluorinating a starting material with hydrogen fluoride and similarly recovering hydrogen fluoride from the product stream. The solution may be anhydrous or aqueous.Type: ApplicationFiled: June 5, 2001Publication date: November 14, 2002Inventors: Paul Nicholas Ewing, Charles John Shields, Christopher Roberts
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Publication number: 20020156331Abstract: A process for recovery of hydrogen fluoride comprises contacting a gaseous mixture containing hydrogen fluoride and an organic compound with a solution of an alkali metal fluoride in hydrogen fluoride, separating a gas phase depleted in hydrogen fluoride and containing the organic compound from a liquid phase enriched in hydrogen fluoride, and then recovering the hydrogen fluoride from the liquid phase.Type: ApplicationFiled: October 7, 1999Publication date: October 24, 2002Inventors: PAUL NICHOLAS EWING, CHARLES JOHN SHIELDS, ROBERT ELLIOTT LOW
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Patent number: 6437201Abstract: An improved process for the manufacture of CF3CHF2 by contacting 1,2-dichloro-1,1,2-trifluoroethane (CClF2CHClF) or 1-chloro-1,1,2,2-tetrafluoroethane (CHF2CClF2) or mixtures of CF3CHCl2 and CClF2CHClF or mixtures of CF3CHClF and CHF2CClF2 with HF in the presence of a Cr2O3 catalyst prepared by pyrolysis of ammonium dichromate, the reaction being conducted under controlled conditions whereby the production of CF3CHF2 is maximized, and the formation of chloropentafluoroethane (CF3CClF2) and other perhalo derivatives is minimized. The subject hydrogen-containing compound is useful as a blowing agent, propellant, refrigerant, fire extinguishing agent, or sterilant carrier gas.Type: GrantFiled: April 24, 1997Date of Patent: August 20, 2002Assignee: Ineos Fluor Holdings LimitedInventors: Paul Nicholas Ewing, Richard Llewellyn Powell, Michael Anthony Davies, Christopher John Skinner
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Patent number: 6407297Abstract: Preparation of a fluorine-containing organic compound by reacting a haloalkene with hydrogen fluoride wherein both the fluorine-containing organic compound and the haloalkene separately form azeotropes with hydrogen fluoride and wherein the haloalkene/hydrogen fluoride azeotrope is more volatile than the fluorine-containing organic compound/hydrogen fluoride azeotrope.Type: GrantFiled: July 13, 2000Date of Patent: June 18, 2002Assignee: Ineos Fluor Holdings LimitedInventor: Paul Nicholas Ewing
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Publication number: 20020040171Abstract: A process for the production of a hydrofluoroalkane, particularly 1,1,1,2-tetrafluoroethane or pentafluoroethane, which comprises contacting a hydrochlorofluoroethane or a hydrochlorofluoroethene with hydrogen fluoride and a fluorination catalyst and recovering a hydrofluoroalkane from the resulting products, the hydrochlorofluoroethane having the formula CClXYCFHZ and the hydrochlorofluoroethene having the formula CClA-CFZ wherein X and Y are each independently chlorine or fluorine, Z is chlorine or hydrogen and A is chlorine or fluorine provided that where each of X and Y is fluorine then Z is hydrogen. A preferred embodiment of the process is the production of 1,1,1,2-tetrafluoroethane from the hydrochlorofluoroethene CCl2═CFH.Type: ApplicationFiled: April 24, 1997Publication date: April 4, 2002Inventors: PAUL NICHOLAS EWING, RICHARD LLEWELLYN POWELL, MICHAEL ANTHONY DAVIES, CHRISTOPHER JOHN SKINNER
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Patent number: 6288292Abstract: Prior to carrying out a gaseous phase chemical reaction, a liquid phase organic compound which is prone to degrade is vaporised at elevated pressures with the aid of a second compound. In one embodiment of the invention vaporisation is effected by co-vaporising a mixture of the two compounds in a vaporiser. In another embodiment, the first compound is injected into a hot gaseous stream and undergoes atomisation into droplets which then vaporise within the gaseous stream. The second compound is used to assist the atomisation process and/or to sweep atomised droplets of the first compound away from hot surfaces where the first compound would otherwise tend to undergo degradation if the droplets are allowed to reside in contact with such surfaces.Type: GrantFiled: November 29, 1999Date of Patent: September 11, 2001Assignee: Imperial Chemical Industries, PLCInventors: John David Scott, Charles Brian Blake, Paul Nicholas Ewing, Jeremy Charles Bauser Hunns
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Publication number: 20010012910Abstract: Prior to carrying out a gaseous phase chemical reaction, a liquid phase organic compound which is prone to degrade is vaporized at elevated pressures with the aid of a second compound. In one embodiment of the invention, vaporization is effected by co-vaporizing a mixture of the two compounds in a vaporizer. In another embodiment, the first compound is injected into a hot gaseous stream and undergoes atomization into droplets which then vaporize within the gaseous stream. The second compound is used to assist the atomization process and/or to sweep atomized droplets of the first compound away from hot surfaces where the first compound would otherwise tend to undergo degradation if the droplets are allowed to reside in contact with such surfaces.Type: ApplicationFiled: April 11, 2001Publication date: August 9, 2001Inventors: John David Scott, Charles Brian Blake, Paul Nicholas Ewing, Jeremy Charles Bauser Hunns, Steven Toplis, Andrew Neil Irwin, Mark Spruce
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Patent number: 6270742Abstract: A process for separating and recovering hydrogen fluoride from a mixture with an organic compound especially a fluorine-containing compound by extraction with a solution of an alkali metal fluoride in hydrogen fluoride, phase separation and recovery. A process for producing a fluorine-containing organic compound by fluorinating a starting material with hydrogen fluoride and similarly recovering hydrogen fluoride from the product stream. The solution may be anhydrous or aqueous.Type: GrantFiled: April 8, 1998Date of Patent: August 7, 2001Assignee: Imperial Chemical Industries PLCInventors: Paul Nicholas Ewing, Charles John Shields, Christopher Roberts
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Patent number: 6127586Abstract: A process for the production of pentafluoroethane which comprises the steps (i) producing a composition comprising a compound of formula C.sub.2 HCl.sub.x F.sub.y in which x=1,2 or 3 and y=2,3 or 4 provided that x+y is 5, contaminated with a compound of formula C.sub.2 Cl.sub.x+1 F.sub.y, (ii) separating the compound of formula C.sub.2 HCl.sub.x F.sub.y from the compound of formula C.sub.2 Cl.sub.x+1 F.sub.y, and (iii) contacting the compound of formula C.sub.2 HCl.sub.x F.sub.y with hydrogen fluoride in the presence of a fluorination catalyst to produce pentafluoroethane is disclosed.Type: GrantFiled: February 4, 1999Date of Patent: October 3, 2000Assignee: Imperial Chemical Industries PLCInventors: John David Scott, Charles John Shields, Paul Nicholas Ewing
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Patent number: 6111151Abstract: Process for removing water from compositions containing water, organics and hydrogen fluoride (e.g. product stream from vapour phase hydrofluorination processes, e.g. manufacture of HFA 134a, HFA 125 or HFA 32) by phase separation and purge of the aqueous layer.Type: GrantFiled: February 8, 1999Date of Patent: August 29, 2000Assignee: Imperial Chemical Industries PLCInventors: Paul Nicholas Ewing, Paul David Bernard Bujac, David William Bonniface
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Patent number: 6034288Abstract: Prior to carrying out a gaseous phase chemical reaction, a liquid phase organic compound which is prone to degrade is vaporised at elevated pressures with the aid of a second compound. In one embodiment of the invention, vaporisation is effected by co-vaporising a mixture of the two compounds in a vaporiser. In another embodiment, the first compound is injected into a hot gaseous stream and undergoes atomisation into droplets which then vaporise within the gaseous stream. The second compound is used to assist the atomisation process and/or to sweep atomised droplets of the first compound away from hot surfaces where the first compound would otherwise tend to undergo degradation if the droplets are allowed to reside in contact with such surfaces.Type: GrantFiled: September 25, 1995Date of Patent: March 7, 2000Assignee: Imperial Chemical Industries PLCInventors: John David Scott, Charles Brian Blake, Paul Nicholas Ewing
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Patent number: 5962753Abstract: Process for the manufacture of pentafluoroethane ?HFC 125! by reaction of perchloroethylene with hydrogen fluoride in the vapor phase over a fluorination catalyst in a fluorination reactor with recycle of dichlorotrifluoroethane ?HCFC 123! and chlorotetrafluoroethane ?HCFC 124! to the fluorination reactor, wherein tetrafluoroethane ?HFC 134a! is also recycled to the fluorination reactor. The tetrafluoroethane and the chlorotetrafluoroethane can both be separated from the product stream in a single distillation column and recycled, together to the fluorination reactor.Type: GrantFiled: February 18, 1997Date of Patent: October 5, 1999Assignee: Imperial Chemical Industries PLCInventors: Charles John Shields, Paul Nicholas Ewing
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Patent number: 5928479Abstract: A process for the purification of pentafluoroethane by removing chloropentafluoroethane therefrom which comprises adding to the impure pentafluoroethane a component which undergoes a non-ideal interaction with chloropentafluoroethane and/or with the azeotrope of chloropentafluoroethane and pentafluoroethane such that the volatility of chloropentafluoroethane and/or the azeotrope of chloropentafluoroethane and pentafluoroethane relative to bulk pentafluoroethane is increased and distilling the mixture.Type: GrantFiled: September 19, 1996Date of Patent: July 27, 1999Assignee: Imperial Chemical Industries PLCInventors: Paul Nicholas Ewing, Stuart Corr, John Stuart Martin, Michael John Watson