John H Fassbaugh

US Patent:

20070101762, May 10, 2007

Filed:

Nov 9, 2005

Appl. No.:

11/269662

Inventors:

Herbert Schaub - East Amherst NY, US
Todd Skare - The Woodlands TX, US
John Fassbaugh - Elma NY, US
Douglas May - Sanborn NY, US
Scott Spriggs - East Amherst NY, US

International Classification:

F25J 3/00

US Classification:

062617000, 062643000, 062620000, 062902000

Abstract:

A method for designing a cryogenic air separation plant wherein a particular plant which fits into a certain classification is designed by first employing at least one predesigned subsystem for that classification to form a base system and then completing the design by adding to the base system at least one auxiliary subsystem designed specifically for that particular plant.

US Patent:

60105550, Jan 4, 2000

Filed:

Nov 4, 1997

Appl. No.:

8/964293

Inventors:

James Smolarek - Boston NY
John Harry Fassbaugh - Elma NY
Michael Kenneth Rogan - Springville NY
Herbert Raymond Schaub - East Amherst NY

Assignee:

Praxair Technology, Inc. - Danbury CT

International Classification:

B01D 53047

US Classification:

95 98

Abstract:

A vacuum pressure swing adsorbent (VPSA) system and method for separating a component from a fluid mixture and including a fluid source for introducing the mixture into the system and a supply apparatus for collecting the separated component. A pair of adsorbent bed vessels is interposed between the fluid source and the supply apparatus to adsorb and desorb a predetermined component under respective adsorption and desorption pressures characterized by a low pressure ratio and relatively high desorption pressure values. Implementation of a single-stage vacuum device made possible by the use of the high desorption pressure, results in further reduction in both equipment and operating costs.

US Patent:

61835374, Feb 6, 2001

Filed:

Nov 4, 1997

Appl. No.:

8/963803

Inventors:

Herbert Raymond Schaub - East Amherst NY
John Harry Fassbaugh - Elma NY
James Smolarek - Boston NY
Michael Kenneth Rogan - Springville NY

Assignee:

Praxair Technology, Inc. - Danbury CT

International Classification:

B01D 53047

US Classification:

95 96

Abstract:

The invention comprises a pressure swing adsorption process for the separation of a less adsorbable component from a mixture comprising the less adsorbable component and a more adsorbable component, the process comprising a cyclic adsorption/desorption process wherein the desorption step is at a selected pressure and occurs for a selected time such that a pressure reducing apparatus utilized to evacuate the gas does not require extraneous cooling.

US Patent:

57592420, Jun 2, 1998

Filed:

Jul 23, 1996

Appl. No.:

8/681550

Inventors:

James Smolarek - Boston NY
Frederick Wells Leavitt - Amherst NY
Jeffert John Nowobilski - Orchard Park NY
Victor Emmanuel Bergsten - East Amherst NY
John Harry Fassbaugh - Elma NY

Assignee:

Praxair Technology, Inc. - Danbury CT

International Classification:

B01D 53047

US Classification:

96149

Abstract:

A vessel for use in a pressure swing adsorption gas separation process includes an enclosing wall which defines an enclosed space having a top region and a bottom region. An annular adsorbent bed is positioned within the enclosed space and has a porous outer wall, a porous inner wall and adsorbent material positioned between the walls. The porous outer wall is separated from the enclosing wall to create a gas feed channel therebetween, and the porous inner wall surrounds an inner tank whose wall surface is separated from the porous inner wall and creates a product flow channel therebetween. A gas feed/distribution baffle structure is positioned in the bottom region of the vessel and in fluid communication with the gas feed channel to provide a gas feed thereto. The gas feed enters the gas feed channel and the adsorbent bed via the porous outer wall and in a direction generally radially towards the inner porous wall and product flow channel. A product outlet is positioned in the bottom region and in fluid communication with the product flow channel, for collecting product gas passing thereinto via the porous inner wall from the adsorbent bed.

US Patent:

56583710, Aug 19, 1997

Filed:

Nov 6, 1995

Appl. No.:

8/554175

Inventors:

James Smolarek - Boston NY
Herbert Raymond Schaub - East Amherst NY
John Harry Fassbaugh - Elma NY
Timothy Mark Aaron - Williamsville NY

Assignee:

Praxair Technology, Inc. - Danbury CT

International Classification:

B01D 53053

US Classification:

95101

Abstract:

A pressure swing adsorption process for the recovery of oxygen from air improves upon a prior art process by depressurizing the adsorbent bed within an adsorbent vessel to an intermediate pressure by releasing void space gas from the product end of the vessel to a low purity oxygen tank while concurrently evacuating the adsorbent vessel from the feed end. This action enables an increased speed of depressurization and a reduction of the cycle time. Further, the adsorbent bed is repressurized to an intermediate pressure from the product outlet end with gas from the low purity oxygen tank, while concurrently pressurizing the adsorbent vessel from the input feed end. This action increases the load time fraction for a feed/vacuum blower. Further, oxygen is introduced to the product end of the adsorbent bed vessel from a high purity oxygen tank (which provides product to downstream applications) while concurrently, air is introduced to the feed end of the adsorbent bed within the vessel. This enables an increased speed of increase in pressure in the bed from the intermediate desorption pressure.