Pressure swing adsorption process

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5704964
SERIAL NO

08578224

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ATTORNEY / AGENT: (SPONSORED)

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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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Patent Owner(s)

Patent OwnerAddressTotal Patents
NIPPON SANSO CORPORATIONTOKYO59

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hayashi, Shin Kawasaki, JP 13 71
Ikeda, Kenji Kawasaki, JP 127 712
Kaneko, Teruji Kawasaki, JP 3 53
Kawai, Masato Kawasaki, JP 40 479
Kudo, Kenji Kawasaki, JP 10 69
Usogoe, Kazuto Kawasaki, JP 1 19

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (1)
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CARLETON LIFE SUPPORT SYSTEMS, INC. (1)
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The BOC Group, Inc. (3)
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* 5529607 PSA process with dynamic purge control 48 1995
 
AIR PRODUCTS AND CHEMICALS, INC. (2)
* 4472177 Control system and method for air fractionation by vacuum swing adsorption 43 1982
* 5540758 VSA adsorption process with feed/vacuum advance and provide purge 30 1995
 
ECIA - EQUIPEMENTS ET COMPOSANTS POUR L'INDUSTRIE AUTOMOBILE (1)
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L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE (1)
* 5158625 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 23 2003
 
Hudson Oxygen Therapy Sales Company (1)
* 4648888 Oxygen concentrator 67 1985
 
PRAXAIR TECHNOLOGY, INC. (2)
* 5407465 Tuning of vacuum pressure swing adsorption systems 39 1993
* 5536299 Simultaneous step pressure swing adsorption process 20 1994
 
UNION CARBIDE INDUSTRIAL GASES INC. (1)
* 4810265 Pressure swing adsorption process for gas separation 56 1987
 
UOP (1)
* 4693730 Pressure swing adsorption product purity control method and apparatus 52 1986
 
BOC LIMITED (2)
* 4348213 Process for the separation of a gaseous mixture 45 1981
* 4576614 Process and apparatus for separation of a gaseous mixture 34 1981
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
OSAKA GAS CO., LTD. (1)
8974575 Method of enriching combustible gas 1 2011
 
INVACARE CORPORATION (11)
* 6302107 Apparatus and method for forming oxygen-enriched gas and compression thereof for high-pressure mobile storage utilization 71 1998
7204249 Oxygen conserving device utilizing a radial multi-stage compressor for high-pressure mobile storage 37 2000
6805122 Oxygen conserving device utilizing a radial multi-stage compressor for high-pressure mobile storage 38 2001
6923180 Oxygen conserving device utilizing a radial multi-stage compressor for high-pressure mobile storage 34 2003
7294170 Apparatus for compressing and storing oxygen enriched gas 16 2005
8062003 System and method for providing oxygen 10 2005
* 2007/0065,301 System and method for providing oxygen 3 2005
8123497 Apparatus for compressing and storing oxygen enriched gas 1 2007
* 2008/0118,373 APPARATUS FOR COMPRESSING AND STORING OXYGEN ENRICHED GAS 3 2007
* 2011/0038,740 COMPRESSOR 1 2010
9624918 Pumping device 0 2013
 
NIPPON SANSO CORPORATION (1)
* 5985003 Oxygen production process by pressure swing adsorption separation 5 1998
 
DELPHI TECHNOLOGIES, INC. (4)
7722698 Method of determining the purity of oxygen present in an oxygen-enriched gas produced from an oxygen delivery system 6 2008
* 2009/0211,438 Method of determining the purity of oxygen present in an oxygen-enriched gas produced from an oxygen delivery system 5 2008
* 2009/0229,460 SYSTEM FOR GENERATING AN OXYGEN-ENRICHED GAS 0 2008
* 2009/0212,962 Oxygen Generating System with Self-Contained Electronic Diagnostics and Fault-Tolerant Operation 1 2009
 
OXUS AMERICA, INC. (1)
8075676 Damping apparatus for scroll compressors for oxygen-generating systems 2 2009
 
LUMMUS TECHNOLOGY INC. (4)
* 6699307 High recovery PSA cycles and apparatus with reduced complexity 27 2002
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6858065 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)
* 5891218 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 12 2006
 
PRAXAIR TECHNOLOGY, INC. (3)
* 6527831 Argon purification process 13 2000
* 7179324 Continuous feed three-bed pressure swing adsorption system 12 2004
* 2005/0257,685 Continuous feed three-bed pressure swing adsorption system 12 2004
 
TEIJIN PHARMA LIMITED (1)
* 2006/0283,325 Oxygen concentrating apparatus and rotary valve 7 2004
* Cited By Examiner