Imperial Chemical Industries Limited

Ineos Fluor Holdings Limited

Ineca Fluor Holdings Limited

Paul Nicholas Ewing

John David Scott

Charles John Shields

Charles Brian Blake

Michael John Watson

Jeremy Charles Bauser Hunns

Christopher Roberts

Robert E Low

Stuart Corr

Richard Llewellyn Powell

Leslie Burgess

Geoffrey James Moore

John Stuart Martin

David William Bonniface

Paul David Bujac

Steven Toplis

Kenneth Taylor

Richard Llewellwyn Powell

Mark Spruce

Lisa Bradley

Andrew Neil Irwin

Christopher John Skinner

Michael Anthony Davies

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.

Apparatus for vaporization of liquids

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.

Hydrogen fluoride recovery process

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.

An improved process for the manufacture of CF CHF by contacting 1,2-dichloro-1,1,2-trifluoroethane (CClF CHClF) or 1-chloro-1,1,2,2-tetrafluoroethane (CHF CClF ) or mixtures of CF CHCl and CClF CHClF or mixtures of CF CHClF and CHF CClF with HF in the presence of a Cr O catalyst prepared by pyrolysis of ammonium dichromate, the reaction being conducted under controlled conditions whereby the production of CF CHF is maximized, and the formation of chloropentafluoroethane (CF CClF ) 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.

Production of hydrofluoroalkanes

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.

Preparation of fluorine-containing organic compounds

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.

Process and apparatus for vaporization of halocarbons

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.

Production of pentafluoroethane

Removal of water from process streams

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.

Process for vaporization of halocarbons

Process for the manufacture of pentafluoroethane

Process for the purification of pentafluoroethane

This invention relates to a process for the production of 1,1,2,2- and/or 1,1,1,2-tetrafluoroethanes, and in particular to a process for the production of 1,1,1,2-tetrafluoroethane.

Products of tetrafluorothanes

Growing community of inventors

Warrington, United Kingdom

Paul Nicholas Ewing