Praxair Technology, Inc.

Alliedsignal Inc.

Arthur Edward Holmer

Michael M Litwin

Sateria Salim

Salim Sateria

Kevin Bruce Albaugh

Ronald William Shrewsbury

Dante Patrick Bonaquist

Bayram Arman

Prasad Shrikrisnna Apte

Mark Leonard Malczewski

Stephen Alan Conviser

Raymond P Roberge

Hollis C Demmin

Wendell W Isom

James Philip Natwora, Jr

This invention is directed a method for producing an ultra-high purity semiconductor gas such as ammonia gas. The method includes the steps of directing an ammonia fluid having a liquid phase moisture content that is less than about 500 parts per million through an evaporation means, to produce purified vapor phase ammonia, and directing the purified vapor phase ammonia through an adsorption means to remove impurities therein and produce ultra-high purity ammonia gas.

Method for purifying semiconductor gases

This invention is directed to a method for vaporizing a liquid by slowly evaporating the liquid from a liquid phase to a vapor phase below the boiling point of the liquid; and applying an effective amount of microwave power to maintain the slow evaporation of the liquid to produce a purified liquid.

Method of vaporizing liquids by microwave heating

This invention is directed a method for purifying an impure gas to produce an ultra-high purity gas comprising the steps of a) passing the impure liquefied gas through a first adsorption means to remove impurities from the liquid phase therein to produce a first purified fluid; b) passing the first purified fluid through an evaporation means to remove impurities therein to produce a second purified gas; and c) passing the second purified gas through a second adsorption means to remove impurities from the vapor phase therein to produce the ultra-high purity gas.

A food freezing system wherein refrigeration is generated by compressing, cooling and then expanding a defined multicomponent refrigerant mixture, which, after providing refrigeration to the food, is warmed against itself to effect the cooling.

Food freezing system

A process for removing impurities such as oxygen, nitrogen, carbon monoxide, hydrogen, water (moisture), carbon dioxide, hydrogen chloride, methane and trace metals from crude hydrogen bromide and the apparatus for purifying such crude hydrogen bromide.

Process and apparatus for purifying hydrogen bromide

This invention is directed to a method and system for purifying hexafluoroethane near its critical temperature and pressure, particularly where the hexafluoroethane contains at least about 1 ppb by weight of a non-volatile residue. A combination of a sand trap, an adsorption assembly made of a glass wool-molecular sieve-glass wool combination, and a filter is used.

Purification of hexafluoroethane

The invention is a method of removing materials such as carbon and metallic elements from a substrate surface via heating in an atmosphere of molecular chlorine and steam. In a preferred embodiment, carbon residue is removed from the surface of a Si or GaAs substrate material.

Removal of carbon from substrate surface

This invention is directed to a method for producing UHP tungsten hexafluoride by introducing an amount of crude tungsten hexafluoride to an evaporating process for separation into an amount of tungsten hexafluoride-containing volatile impurities and an amount of non-volatile metallic impurities; passing the amount of tungsten hexafluoride-containing volatile residue to a gas phase adsorption process for separation into an amount of semi-crude tungsten hexafluoride product and an amount of hydrogen fluoride non-volatile residue; and passing the amount of semi-crude tungsten hexafluoride product to a sparging system using UHP helium for separation into a non-volatile UHP tungsten hexafluoride product.

Method for making UHP tungsten hexafluoride

Removal of carbon from substrate surfaces

A method of increasing the shelf life of a sterilant mixture of ethylene oxide and one or more halocarbons when the mixture is in contact with iron oxide on the surface of a storage vessel. Sufficient carbon dioxide is added to the mixture to reduce the reactivity of the iron oxide for converting ethylene oxide to reaction products of ethylene oxide. In an alternate embodiment, a hollow carbon steel vessel which holds a mixture of ethylene oxide and a halocarbon as a sterilizing gas has its inside surface passivated by forming a reaction product of iron oxide and carbon dioxide.

Shelf life improvement for ethylene oxide sterilant mixes

A particle sampling system which includes a flow restrictor positioned in a conduit between a vent and an analyzer probe and restricts flow in the conduit to maintain an overpressure of sample gas at the counter probe which, in turn, forces the gas sample into the particle analyzer. The system further includes a reservoir for holding a working fluid usable with a particle analyzer and a pressurized gas source which is used to pressurize the reservoir to enable supply of the working fluid against the pressure of the gas analysis sample and to provide a purge gas for the analyzer.

Growing community of inventors

Lewiston, NY, United States of America

Arthur Edward Holmer