Air Products and Chemicals, Inc.

Andrew Joseph Woytek

John T Lileck

Howard P Withers, Jr

John Peter Hobbs

James Francis Heffron

Eugene Joseph Karwacki, Jr

Zbigniew Zurecki

Thomas Hsiao-Ling Hsiung

Robert George Syvret

James Joseph Hart

Frank Michael Prozonic

Edward J Steigerwalt

Arron D Varn

Daniel G Coronell

Thomas H-l Hsiung

Daniel Gene Coronell

Howard Paul Withers

An improved method of processing a nonferrous metal and alloys of said metal using a blanketing gas having a global warming potential is provided. The improvement involves reducing the global warming potential of the blanketing gas by blanketing the nonferrous metal and alloys with a gaseous mixture including at least one compound selected from the group consisting of COF , CF COF, (CF ) CO, F COF, F C(OF) , SO F , NF , SO ClF, SOF , SOF , NOF, F and SF .

Blanketing metals and alloys at elevated temperatures with gases having reduced global warming potential

An improved method of processing a molten non-ferrous metal and alloys of the metal using a blanketing gas having a global warming potential is provided. The improvement involves reducing the global warming potential of the blanketing gas by blanketing the molten non-ferrous metal and alloys with a gaseous mixture including at least one compound selected from the group consisting of SO F , NF , SO CLF, SOF , and NOF.

Blanketing molten nonferrous metals and alloys with gases having reduced global warming potential

An economical means of safely &ldquo;containing&rdquo; or &ldquo;packaging&rdquo; commercial electrophilic fluorination agents whereby these agents are readily stored and transported in a package, typically without loss of &ldquo;F &rdquo; activity, and in a form which is readily and directly useable, i.e., in solution or a slurry. Importantly, the solution/slurry medium provides a tremendous safety margin for storage and transportation since the solution medium has an enormous ability to absorb heat (due to the latent heat of vaporization of the liquid) relative to the contained active fluorination agent.

Package for safe storage of electrophilic fluorinating agent

The present invention is directed to a method for the synthesis of nitrogen trifluoride from elemental fluorine gas and a source of ammonia in a gas-liquid phase reaction comprising;

Process for nitrogen trifluoride synthesis

Method and apparatus to contain dangerous gases venting or leaking from a primary containment vessel. An outer containment vessel holds the primary containment vessel in fluid tight relationship to the outer vessel. The outer vessel has an internal volume large enough to contain the entire contents of the inner vessel and includes means to absorb or scrub gas leaking from the inner vessel. Removal of gas from the inner vessel to a point of use is controlled by valves and conduits contained in the outer vessel, the valves being controlled from outside the vessels.

Handling and delivery system for dangerous gases

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 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 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

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.

Growing community of inventors

Allentown, PA, United States of America

Andrew Joseph Woytek