Air Products and Chemicals, Inc.

Other

John T Lileck

Webb I Bailey

Frank Kenneth Schweighardt

Andrew Joseph Woytek

Eugene G Lutz

John K Graybill

Howard P Withers, Jr

Edward J Steigerwalt

Athanasios Georgios Tsirukis

John Papinsick

Kenneth E Fegley

A process for reducing or eliminating NH /HF/MFz liquid waste melt in the manufacture of NF is provided which includes the steps of providing an NF reactor for a reaction of F with a liquid NH /HF/MFz mixture that produces NF , HF, N and other nitrogen fluorides as gaseous products and a liquid NH /HF/MFz mixture as the liquid waste melt. The process further provides for reduction or elimination of the liquid NH /HF/MFz waste melt produced by the reactor.

Process for the reduction or elimination of NH3/HF byproduct in the manufacture of nitrogen trifluoride

High purity metal fluorides (ZrF.sub.4, HfF.sub.4, AlF.sub.3) are produced by incomplete reaction of metal or their compounds with elemental fluorine and subsequent elevated temperature sublimation of the metal fluoride from the reaction products wherein unreacted metal or metal compounds act as 'getters' to convert volatile impurity metal fluorides to non-volatile metals or metal compounds.

Process for the production of high purity zirconium tetrafluoride and

A novel composition of the formula: ##STR1## wherein the carbon rings are fully fluorinated.

Perfluorinated 2-ISO propyl derivative compounds

A method of vapor bath soldering wherein vapor bath compositions include compounds of the formula: ##STR1## wherein the carbon rings are fully fluorinated and R is selected from the group consisting of fluorine, --CF.sub.3 or --CF(CF.sub.3).sub.2.

Perfluorinated propyl derivative compounds for vapor bath soldering

Novel compositions include compounds of the formula: ##STR1## wherein the carbon rings are fully fluorinated.

Perfluorinated propyl derivative compounds

Novel compositions include compounds of the formula: ##STR1## wherein the carbon rings are fully fluorinated and R is selected from the group consisting of fluorine, --CF.sub.3 or --CF(CF.sub.3).sub.2.

Novel compositions of matter are disclosed; perfluoro-1,1-di(orthoxylyl) methane, perfluoro-1,1-di(orthoxylyl) ethane and perfluoro-1,1-di(orthoxylyl) propane. The compositions are made by cobalt trifluoride fluorination of 1,1-di(orthoxylyl) methane, 1,1-di(orthoxylyl) ethane and 1,1-di(orthoxylyl) propane. The compositions have utility as vapor phase soldering fluids.

Perfluoro-1,1-di(orthoxylyl)alkyl compounds

A method for cutting pipe casings and concrete liners or perforating the same and localized portions of surrounding strata in an earth bore is set forth wherein a gas phase cutting or perforating jet mixture of fluorine and nitrogen trifluoride is delivered to the cutting or perforation site from the decomposition of a solid, normally stable, perfluoroammonium salt. An appropriate apparatus for delivering the gas mixture of fluorine and nitrogen trifluoride from the salt is also disclosed.

Method and apparatus for perforating or cutting with a solid fueled gas

This invention relates to a process for purifying a nitrogen trifluoride containing atmosphere contaminated with dinitrogen difluoride. The atmosphere is purified by heating the nitrogen trifluoride atmosphere in the presence of a particulate metal capable of defluorinating dinitrogen difluoride, but inert to nitrogen trifluoride, preferably the metal being selected from the group consisting of iron, cobalt, and nickel, to a temperature of from about 300.degree.-1000.degree. F. for a time sufficient to effect defluorination of the dinitrogen difluoride.

Removal of dinitrogen difluoride from nitrogen trifluoride

This invention relates to an improvement in a process for purifying nitrogen trifluoride atmospheres generally contaminated with nitrous oxide, water, and dinitrogen difluoride. The improvement for extending adsorber life resides in reducing the dinitrogen difluoride content in the atmosphere to less than 0.03% by volume prior to passing the atmosphere through the adsorber.

Purification of nitrogen trifluoride atmospheres

Iodine pentafluoride is produced from gaseous fluorine and molten iodine by contacting the iodine with fluorine in a reaction zone maintained at a temperature in the range of about 114.degree. to about 280.degree. C. The process results in high yields of pure iodine pentafluoride.

Preparation of iodine pentafluoride by direct fluorination of molten

Nitrogen trifluoride is prepared by passing elemental fluorine in intimate contact with liquid phase ammonium acid fluoride maintained at a temperature above its melting point but below about 400.degree. F for a time sufficient to effect reaction. Generally, ammonia is injected into the ammonium acid fluoride along with the fluorine to maintain a molar ratio of by-product hydrogen fluoride to ammonia of approximately 2.0 to 2.5.

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Tamaqua, PA, United States of America

John T Lileck