US Patent No: 8,152,898

Number of patents in Portfolio can not be more than 2000

Helium recovery process

ALSO PUBLISHED AS: 20100101410

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Abstract

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Helium is recovered from gas streams containing high concentrations of hydrogen gas and low concentrations of helium gas, such as from the recycle stream from the production of ammonia. The inventive process provides for an integrated process for the recovery of both an enriched helium gas stream product and a high purity hydrogen gas stream product.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
PRAXAIR TECHNOLOGY, INC.DANBURY, CT812

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Heim, Carl Joseph Amherst, NY 13 22
Maloney, James Joseph Amherst, NY 6 6
Prasad, Ravi Corvallis, OR 142 1880

Cited Art Landscape

Patent Info (Count) # Cites Year
 
PRAXAIR TECHNOLOGY, INC. (4)
5,185,014 Membrane oxygen process and system 21 1991
5,329,775 Cryogenic helium production system 6 1992
5,771,714 Cryogenic rectification system for producing higher purity helium 3 1997
* 7,294,172 Helium recovery 10 2002
 
L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE (2)
* 5,928,415 Selection device for providing one or the other of two gases to an apparatus 8 1996
* 6,669,922 Installation for the production of pure hydrogen from a gas containing helium 2 2000
 
Nitrotec Corporation (2)
5,542,966 Helium recovery 11 1994
5,632,803 Enhanced helium recovery 15 1995
 
Allied Corporation (1)
4,425,318 Hydriding body-centered cubic phase alloys at room temperature 12 1982
 
Bergwerksverband GmbH (1)
5,080,694 Process for helium recovery 12 1989
 
ERGENICS, INC. (1)
4,360,505 Recovering hydrogen from gas stream using metal hydride 22 1981
 
International Permeation, Inc. (1)
* 4,793,829 Permeation process for separating ammonia from a gas mixture 8 1988
 
MEMBRANE TECHNOLOGY AND RESEARCH, INC. (1)
2005/0217,479 Helium recovery from gas streams 7 2004
 
PETROLEO BRASILEIRO S.A. - PETROBRAS (1)
6,179,900 Process for the separation/recovery of gases 25 1998
 
UBE INDUSTRIES, LTD. (1)
* 5,064,446 Method of preparing high purity light gas by multiple-step gas separation 21 1988
 
UNION CARBIDE INDUSTRIAL GASES INC. (1)
4,934,148 Dry, high purity nitrogen production process and system 40 1989
 
UOP LLC (1)
4,398,926 Enhanced hydrogen recovery from low purity gas streams 55 1982
* Cited By Examiner

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