US Patent No: 5,704,964

Number of patents in Portfolio can not be more than 2000

Pressure swing adsorption process

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Abstract

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A pressure swing adsorption process which includes switching a plurality of adsorption columns packed with an adsorbent successively to an adsorption step, a pressure equalization step, an evacuation step, a vacuum purge step, a pressure equalization step and a repressurization step to allow a more strongly adsorbable component gas contained in a gaseous mixture to be adsorbed on the adsorbent and to separate a less strongly adsorbable component gas. The process further includes compressing the thus separated less strongly adsorbable component gas by a product gas compressor to supply it as a product gas. An adsorption column having completed the adsorption step and another adsorption column having completed the vacuum purge step are allowed to communicate to each other on product discharge sides and on raw material supply sides respectively in the pressure equalization step, to recover the product gas under gradual increase of gas flow rate on the raw material supply side and also to evacuate the adsorption column having completed the adsoroption step.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
NIPPON SANSO CORPORATIONTOKYO61

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hayashi, Shin Kawasaki, JP 13 50
Ikeda, Kenji Kawasaki, JP 119 567
Kaneko, Teruji Kawasaki, JP 3 43
Kawai, Masato Kawasaki, JP 39 408
Kudo, Kenji Kawasaki, JP 9 64
Usogoe, Kazuto Kawasaki, JP 1 18

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Carleton Life Support Systems, Inc. (1)
* 5,071,453 Oxygen concentrator with pressure booster and oxygen concentration monitoring 82 1990
 
BOC GROUP, INC., THE (3)
* 5,176,722 Pressure swing adsorption method for separating gaseous mixtures 25 1991
* 5,258,056 PSA system with product turndown and purity control 51 1991
* 5,529,607 PSA process with dynamic purge control 48 1995
 
AIR PRODUCTS AND CHEMICALS, INC. (2)
* 4,472,177 Control system and method for air fractionation by vacuum swing adsorption 43 1982
* 5,540,758 VSA adsorption process with feed/vacuum advance and provide purge 29 1995
 
ECIA - EQUIPEMENTS ET COMPOSANTS POUR L'INDUSTRIE AUTOMOBILE (1)
* 5,520,720 Pressure swing adsorption process 32 1994
 
L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE (1)
* 5,158,625 Process and apparatus for heat treating articles while hardening in gaseous medium 10 1991
 
LIFESHIELD SCIENCES LLC (1)
* 2004/0158,312 Braided endoluminal device having tapered filaments 10 2003
 
HUDSON OXYGEN THERAPY SALES COMPANY, A CA CORP. (1)
* 4,648,888 Oxygen concentrator 61 1985
 
PRAXAIR TECHNOLOGY, INC. (2)
* 5,407,465 Tuning of vacuum pressure swing adsorption systems 37 1993
* 5,536,299 Simultaneous step pressure swing adsorption process 19 1994
 
COMMAND (U.S) INC. (1)
* 4,552,571 Oxygen generator with two compressor stages 58 1984
 
UNION CARBIDE INDUSTRIAL GASES INC. (1)
* 4,810,265 Pressure swing adsorption process for gas separation 51 1987
 
UOP LLC (1)
* 4,693,730 Pressure swing adsorption product purity control method and apparatus 52 1986
 
BOC LIMITED (2)
* 4,348,213 Process for the separation of a gaseous mixture 45 1981
* 4,576,614 Process and apparatus for separation of a gaseous mixture 33 1981
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
INVACARE CORPORATION (7)
* 6,302,107 Apparatus and method for forming oxygen-enriched gas and compression thereof for high-pressure mobile storage utilization 60 1998
7,204,249 Oxygen conserving device utilizing a radial multi-stage compressor for high-pressure mobile storage 28 2000
6,805,122 Oxygen conserving device utilizing a radial multi-stage compressor for high-pressure mobile storage 33 2001
6,923,180 Oxygen conserving device utilizing a radial multi-stage compressor for high-pressure mobile storage 26 2003
7,294,170 Apparatus for compressing and storing oxygen enriched gas 10 2005
8,062,003 System and method for providing oxygen 3 2005
8,123,497 Apparatus for compressing and storing oxygen enriched gas 0 2007
 
OSAKA GAS CO., LTD. (1)
8,974,575 Method of enriching combustible gas 0 2011
 
NIPPON SANSO CORPORATION (1)
* 5,985,003 Oxygen production process by pressure swing adsorption separation 5 1998
 
DELPHI TECHNOLOGIES, INC. (1)
7,722,698 Method of determining the purity of oxygen present in an oxygen-enriched gas produced from an oxygen delivery system 6 2008
 
Oxus America, Inc. (1)
8,075,676 Damping apparatus for scroll compressors for oxygen-generating systems 2 2009
 
LUMMUS TECHNOLOGY INC. (4)
* 6,699,307 High recovery PSA cycles and apparatus with reduced complexity 22 2002
* 6,887,301 Flow control in pressure swing adsorption systems 0 2003
6,858,065 High recovery PSA cycles and apparatus with reduced complexity 3 2003
* 2004/0074,388 High recovery PSA cycles and apparatus with reduced complexity 1 2003
 
L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE (1)
* 5,891,218 Bed granulometry and thickness of a PSA unit 9 1997
 
RESPIRONICS, INC. (1)
RE43398 Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator 9 2006
 
PRAXAIR TECHNOLOGY, INC. (2)
* 6,527,831 Argon purification process 12 2000
* 7,179,324 Continuous feed three-bed pressure swing adsorption system 11 2004
* Cited By Examiner