Praxair Technology, Inc.

Union Carbide Industrial Gases Technology Corporation

John Bernard Saunders

Dante Patrick Bonaquist

Minish Mahendra Shah

Neil Mark Prosser

James J Maloney

Richard C Fitzgerald

M Abdul-Aziz Rashad

A method of separating air in which a superheated air stream is introduced into a mass transfer contacting zone associated with a higher pressure column of an air separation unit. Krypton and xenon is washed from a superheated air stream introduced into the mass transfer contacting zone, thereby to form a krypton and xenon-rich liquid. The krypton and xenon-rich liquid is stripped within a stripping column to produce a krypton-xenon-rich bottoms liquid. A krypton-xenon-rich stream composed of the krypton-xenon-rich bottoms liquid from the stripping column is produced for purposes of further refinement.

Krypton and xenon recovery method

A gas liquefaction method which uses the pressure energy of a natural gas processing system to generate refrigeration for high temperature cooling of a gas, and uses a mixed gas refrigerant fluid to generate refrigeration for low temperature cooling of the gas to produce liquefied product.

Gas liquefaction method using natural gas and mixed gas refrigeration

A cryogenic nitrogen rejection unit with improved methane recovery wherein higher quality nitrogen reflux is generated by successive vapor partial condensations and the nitrogen is introduced into a separation column preferably in a cascade fashion.

Methane recovery process for the separation of nitrogen and methane

Growing community of inventors

Grand Island, NY, United States of America

John Bernard Saunders