Air Products and Chemicals, Inc.

Keith B Wilson

Rakesh Agrawal

Steven R Auvil

Thomas E Cormier, Sr

Brian E Farrell

Thirthahalli A Shenoy

Bruce Kyle Dawson

Thomas E Cormier

Suresh U Patel

Thomas C Young

Rakesh Agrawa

The present invention relates to a process for the production of kryton and xenon by using an oxygen-free vapor stream to strip a liquid stream containing oxygen, krypton, methane, and xenon of methane and oxygen. This is accomplished by properly controlling the liquid to vapor flow ratio in the distillation column so that such ratio is less than 0.15. A suitable reflux liquid is used to decrease the loss of krypton and xenon in the methane and oxygen laden vapor stream leaving the distillation system.

Cryogenic process for the production of an oxygen-free and methane-free,

A process is set forth for recovery of nitrogen from a feed gas stream, containing nitrogen and oxygen, using a cryogenic separation wherein a recycle stream having an oxygen content above, equal to or below that of the feed gas stream is recycled from the cryogenic separation to the feed gas stream with a split reboil-condenser function that would allow variation of the oxygen content of the recycle stream.

Process for the production of high pressure nitrogen with split

The present invention is directed to a gas separation system for the recovery of pressurized, substantially pure, constituent gaseous products from a gas mixture using a single pressure distillation column with the feed gas as the working fluid for column reflux and reboil. The present invention is particularly useful for the separation of air into pressurized oxygen and nitrogen products. In an air separation process the nitrogen stream is utilized as secondary cooling gas for a combuster, the exhaust gas of which when fed to a gas turbine can provide air feed compression energy and/or electrical power generation for export or process operation when a generator is attached to the turbine.

Gas separation process with single distillation column

A method of oxygen recycle on the bottom section of the low-pressure column of a dual-pressure column, with an increase in the bottom section reboil vapor rate, allows an appreciable increase in the production rate of ultra high purity oxygen and a substantial decrease in power required as compared to conventional processes.

Process for producing ultra high purity oxygen

This invention pertains to a liquid-gas contacting tray or plate of the sieve type. A plurality of segment zones are established on the tray each having approximately the same area and flow path length. Vertically extending baffles are established within the segment zones to define smaller stages, the baffles being arcuate in shape and of constant radius. A plurality of perforations appear in the floor of the segment zones for vapor passage. By virtue of the establishment of small segment stages of similar length and width, the liquid flow paths, gradients, etc. remain equal and inefficiencies due to local variations in liquid to vapor ratio are minimized.

Sieve type distillation tray with curved baffles

A process is described in which gaseous nitrogen is recovered from air in a cryogenic air separation unit containing a single distillation column wherein the product nitrogen is compressed and a portion of the compressed nitrogen is recycled to the column to provide reboil in the bottom of said column and reflux at the top of said column. A waste crude oxygen stream is expanded to provide refrigeration for the air separation unit.

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Allentown, PA, United States of America

Keith B Wilson