John J Pietruszewski

US Patent:

41404955, Feb 20, 1979

Filed:

May 27, 1977

Appl. No.:

5/801361

Inventors:

John J. Pietruszewski - Buffalo NY

Assignee:

Union Carbide Corporation - New York NY

International Classification:

B01D 5304

US Classification:

55 21

Abstract:

During periods of reduced product withdrawal rate the variable adsorption pressure type of pressure swing adsorption system is controlled by monitoring a product gas flow characteristic and advancing the cycle from its cocurrent depressurization step so as to maintain the product gas withdrawal quantity as a direct and predetermined function of the reduced withdrawal rate.

US Patent:

RE344346, Nov 9, 1993

Filed:

Sep 18, 1991

Appl. No.:

7/761696

Inventors:

Michael J. Campbell - Clarence Center NY
James Smolarek - Boston NY
John J. Pietruszewski - Buffalo NY

Assignee:

Praxair Technology, Inc. - Danbury CT

International Classification:

B01D 5304

US Classification:

96110

Abstract:

Enriched oxygen from a pressure swing adsorption system and air are blended to provide oxygen enriched air of desired purity, particularly for use at flow rates between those for which liquid oxygen and on-site cryogenic air separation plants are desirable.

US Patent:

48677663, Sep 19, 1989

Filed:

Sep 12, 1988

Appl. No.:

7/242605

Inventors:

Michael J. Campbell - Clarence Center NY
James Smolarek - Boston NY
John J. Pietruszewski - Buffalo NY

Assignee:

Union Carbide Corporation - Danbury CT

International Classification:

B01D 5304

US Classification:

55161

Abstract:

Enriched oxygen from a pressure swing adsorption system and air are blended to provide oxygen enriched air of desired purity, particularly for use at flow rates between those for which liquid oxygen and on-site cryogenic air separation plants are desirable.

US Patent:

40667227, Jan 3, 1978

Filed:

May 21, 1976

Appl. No.:

5/688739

Inventors:

John Joseph Pietruszewski - Buffalo NY
Carl Scaccia - Depew NY
Ralph James Wagner - Tonawanda NY

Assignee:

Union Carbide Corporation - New York NY

International Classification:

B01F 304

US Classification:

261 87

Abstract:

A rotatable bell is provided having a generally downwardly diverging shape about a central vertical axis, with the outer wall surface of the bell including a circumferentially extending jet flow surface portion with a plurality of gas flow wall openings circumferentially disposed around the base part thereof. Liquid is flowed downwardly over the jet flow surface portion of the wall from the upper part to the base part thereof to provide a high shear jet flow of liquid into which gas is injected for gas-liquid contacting and bulk mixing thereof.