US Patent No: 5,733,359

Number of patents in Portfolio can not be more than 2000

Pressure swing adsorption process turndown control

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Abstract

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The flow rate of a nonadsorbed product gas stream from a multiple unit PSA plant can be reduced in response to a reduced product demand by isolating all units in the plant and inserting an idle step into the adsorption cycle immediately following bed equalization steps of the cycle. In a preferred embodiment, the duration of the idle step is inversely proportional to the percentage reduction in the product demand. To maintain the product gas purity at the desired level, minor adjustments of the idle step duration can be made following adjustment to the idle step in response to a change in product demand.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
THE BOC GROUP, INC.NEW PROVIDENCE, NJ589

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Brenskelle, Lisa A New Providence, NJ 2 32
Doong, Shain-Jer Millington, NJ 15 162

Cited Art Landscape

Patent Info (Count) # Cites Year
 
PRAXAIR TECHNOLOGY, INC. (3)
5,407,465 Tuning of vacuum pressure swing adsorption systems 37 1993
5,536,299 Simultaneous step pressure swing adsorption process 19 1994
5,518,526 Pressure swing adsorption process 58 1994
 
The BOC Group, Inc. (3)
5,122,164 Process for producing oxygen enriched product stream 56 1991
5,258,056 PSA system with product turndown and purity control 49 1991
5,529,607 PSA process with dynamic purge control 46 1995
 
AIR PRODUCTS AND CHEMICALS, INC. (2)
4,472,177 Control system and method for air fractionation by vacuum swing adsorption 42 1982
5,441,558 High purity nitrogen PSA utilizing controlled internal flows 14 1994
 
BOC GROUP PLC, THE (2)
4,494,966 Process for nitrogen enrichment 21 1983
5,486,226 Separation of gaseous mixtures 17 1993
 
LINDE AKTIENGESELLSCHAFT (2)
4,323,370 Adsorption process producing varying amounts of product gas of a constant purity 39 1980
4,315,759 Adsorption process producing chronologically constant amount of a residual gas 36 1980
 
Bayer Aktiengesellschaft (1)
5,015,271 Separation of gas mixtures by vacuum swing adsorption (VSA) in a two-adsorber system 25 1989
 
BAYER ANTWERP N.V. (1)
4,299,595 Method of operating a cyclical pressure-swing adsorption installation 27 1979
 
Bergwerksverband GmbH (1)
5,108,467 Process for at least partially separating a gaseous component from a mixture of gaseous components 15 1991
 
BOC LIMITED (1)
4,576,614 Process and apparatus for separation of a gaseous mixture 33 1981
 
ECIA - EQUIPEMENTS ET COMPOSANTS POUR L'INDUSTRIE AUTOMOBILE (1)
5,520,720 Pressure swing adsorption process 32 1994
 
Union Carbide Corporation (1)
4,643,743 Pressure swing adsorption process for supplying oxygen under variable demand conditions 18 1983
 
UNION CARBIDE INDUSTRIAL GASES INC. (1)
5,042,994 Control of pressure swing adsorption operations 18 1990
 
Vacuum Optics Corporation of Japan (1)
4,948,391 Pressure swing adsorption process for gas separation 26 1989

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE (7)
5,964,924 Process and installation for the separation of a gas mixture by adsorption 7 1998
6,030,435 Regulation of a PSA process 6 1998
6,090,185 Process for gas separation by adsorption with variable production rate 5 1998
6,287,366 Process for the production of oxygen by adsorption with transatmospheric pressure variation 26 1999
6,224,651 Process from separation of a gas mixture by pressure swing adsorption and plant for its implementation 8 1999
6,238,458 Process for treatment of a gaseous mixture by pressure swing adsorption, with variable production flow rate 9 1999
6,733,568 Method of controlling a plant for processing a gas by adsorption and corresponding processing plant 8 2003
 
PRAXAIR TECHNOLOGY, INC. (7)
6,010,555 Vacuum pressure swing adsorption system and method 25 1997
6,048,384 PSA process and system using simultaneous top and bottom evacuation of absorbent bed 14 1997
6,277,174 Low pressure ratio VPSA plant tuning and balancing system 17 2000
8,496,733 Large scale pressure swing adsorption systems having process cycles operating in normal and turndown modes 0 2011
8,491,704 Six bed pressure swing adsorption process operating in normal and turndown modes 0 2011
8,435,328 Ten bed pressure swing adsorption process operating in normal and turndown modes 0 2011
8,551,217 Six bed pressure swing adsorption process operating in normal and turndown modes 1 2011
 
INOVA LABS, INC, A DELAWARE COMPANY (4)
D606655 Portable oxygen concentrator 4 2008
8,794,237 Oxygen concentrator apparatus and method having flow restricted coupling of the canisters 0 2010
8,616,207 Oxygen concentrator heat management system and method 0 2010
8,603,228 Power management systems and methods for use in an oxygen concentrator 1 2010
 
AIR PRODUCTS AND CHEMICALS, INC. (2)
6,585,804 Pressure swing adsorption process operation at turndown conditions 3 2001
6,709,486 Pressure swing adsorption process with controlled internal depressurization flow 0 2002
 
CARLETON LIFE SUPPORT SYSTEMS, INC. (2)
6,669,758 Variable inlet air restriction for composition control of product gas 6 2002
7,036,521 Air conserving slide valve 1 2003
 
DCNS SA (2)
8,790,618 Systems and methods for initiating operation of pressure swing adsorption systems and hydrogen-producing fuel processing systems incorporating the same 0 2010
8,449,649 Systems and methods for starting up pressure swing adsorption assemblies and hydrogen-producing fuel processing systems including the same 0 2011
 
NORMALAIR-GARRETT (HOLDINGS) LIMITED (2)
6,077,331 Molecular sieve type gas separation apparatus and method 24 1998
6,383,256 Molecular sieve type gas separation apparatus 13 2000
 
RIC INVESTMENTS, LLC. (2)
6,346,139 Total delivery oxygen concentration system 52 2000
6,478,857 Total delivery oxygen concentration system 38 2002
 
HONEYWELL NORMALAIR-GARRETT (HOLDINGS) LIMITED (1)
7,255,104 Breathing gas supply system 8 2004
 
INSTITUT FRANCAIS DU PETROLE (1)
5,863,315 Process for the separation of isoalkanes/n-alkanes by gas phase adsorption using a pressure swing and four adsorbers 6 1997
 
LINDE AKTIENGESELLSCHAFT (1)
5,997,611 Single vessel gas adsorption system and process 12 1998
 
NIPPON SANSO CORPORATION (1)
5,985,003 Oxygen production process by pressure swing adsorption separation 5 1998