Gregory K Fleming

US Patent:

6444011, Sep 3, 2002

Filed:

Jan 25, 2001

Appl. No.:

09/768262

Inventors:

Jospeh E. Paganessi - Burr Ridge IL
David Vassallo - Glenview IL
Gregory K. Fleming - Wilmington DE

Assignee:

American Air Liqide, Inc. - Fremont CA

International Classification:

B01D 5322

US Classification:

95 45, 95 47, 95 53, 95 90, 95149, 95288

Abstract:

Processes and systems to recover at least one perfluorocompound gas from a gas mixture are provided. In one embodiment the inventive process comprises the steps of a) providing a gas mixture comprising at least one perfluorocompound gas and at least one carrier gas, the gas mixture being at a predetermined pressure; b) providing at least once glassy polymer membrane having a feed side and a permeate side; c) contacting the feed side of the at least one membrane with the gas mixture; d) withdrawing from the feed side of the membrane as a non-permeate stream at a pressure which is substantially equal to the predetermined pressure a concentrated gas mixture comprising essentially the at least one perfluorocompound gas; and e) withdrawing from the permeate side of the membrane as a permeate stream a depleted gas mixture comprising essentially the at least one carrier gas.

US Patent:

6605133, Aug 12, 2003

Filed:

Apr 23, 1999

Appl. No.:

09/296652

Inventors:

Joseph E. Paganessi - Burr Ridge IL
David Vassallo - Glenview IL
Gregory K. Fleming - Wilmington DE

Assignee:

LAir Liquide - Societe Anonyme a Directoire et Conseil de Surveillance pour lEtude et lExploitation des Procedes Georges Claude - Paris
American Air Liquide - Fremont CA

International Classification:

B01D 5322

US Classification:

95 45, 95 47, 95 53, 95 54

Abstract:

Processes and systems to recover at least one perfluorocompound gas from a gas mixture are provided. In one embodiment the inventive process comprises the steps of a) providing a gas mixture comprising at least one perfluorocompound gas and at least one carrier gas, the gas mixture being at a predetermined pressure; b) providing at least one glassy polymer membrane having a feed side and a permeate side; c) contacting the feed side of the at least one membrane with the gas mixture; d) withdrawing from the feed side of the membrane as a non-permeate stream at a pressure which is substantially equal to the predetermined pressure a concentrated gas mixture comprising essentially the at least one perfluorocompound gas; and e) withdrawing from the permeate side of the membrane as a permeate stream a depleted gas mixture comprising essentially the at least one carrier gas.

US Patent:

D2794543, Jul 2, 1985

Filed:

Jan 3, 1983

Appl. No.:

6/455349

Inventors:

Gregory J. Fleming - Livermore CA

Assignee:

The Clorox Company - Oakland CA

US Classification:

D 9377

US Patent:

57857415, Jul 28, 1998

Filed:

Jun 14, 1996

Appl. No.:

8/665142

Inventors:

Joseph E. Paganessi - Burr Ridge IL
David Vassallo - Glenview IL
Gregory K. Fleming - Wilmington DE

Assignee:

L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des
Procedes Georges, Claude - Paris
American Air Liquide - Walnut Creek CA

International Classification:

B01D 5322
B01D 5304

US Classification:

96 4

Abstract:

Processes and systems to recover at least one perfluorocompound gas from a gas mixture are provided. In one embodiment the inventive process comprises the steps of a) providing a gas mixture comprising at least one perfluorocompound gas and at least one carrier gas, the gas mixture being at a predetermined pressure; b) providing at least one glassy polymer membrane having a feed side and a permeate side; c) contacting the feed side of the at least one membrane with the gas mixture; d) withdrawing from the feed side of the membrane as a non-permeate stream at a pressure which is substantially equal to the predetermined pressure a concentrated gas mixture comprising essentially the at least one perfluorocompound gas; and e) withdrawing from the permeate side of the membrane as a permeate stream a depleted gas mixture comprising essentially the at least one carrier gas.

US Patent:

62140892, Apr 10, 2001

Filed:

Jul 21, 1998

Appl. No.:

9/119453

Inventors:

Jospeh E. Paganessi - Burr Ridge IL
David Vassallo - Glenview IL
Gregory K. Fleming - Wilmington DE

Assignee:

American Air Liquide, Inc. - Walnut Creek CA
L'Air Liquide, Societe Anonyme pour l'Etude et, l'Exploitation des Procedes
Georges Claude - Paris

International Classification:

B01D 5322
B01D 5304
B01D 4700

US Classification:

95 45

Abstract:

Processes and systems to recover at least one perfluorocompound gas from a gas mixture are provided. In one embodiment the inventive process comprises the steps of a) providing a gas mixture comprising at least one perfluorocompound gas and at least one carrier gas, the gas mixture being at a predetermined pressure; b) providing at least one glassy polymer membrane having a feed side and a permeate side; c) contacting the feed side of the at least one membrane with the gas mixture; d) withdrawing from the feed side of the membrane as a non-permeate stream at a pressure which is substantially equal to the predetermined pressure a concentrated gas mixture comprising essentially the at least one perfluorocompound gas; and e) withdrawing from the permeate side of the membrane as a permeate stream a depleted gas mixture comprising essentially the at least one carrier gas.

US Patent:

63125021, Nov 6, 2001

Filed:

Apr 23, 1999

Appl. No.:

9/296651

Inventors:

Jospeh E. Paganessi - Burr Ridge IL
David Vassallo - Glenview IL
Gregory K. Fleming - Wilmington DE

Assignee:

L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes
Georges Claude - Paris
American Air Liquide - Walnut Creek CA

International Classification:

B01D 5322

US Classification:

95 45

Abstract:

Processes and systems to recover at least one perfluorocompound gas from a gas mixture are provided. In one embodiment the inventive process comprises the steps of a) providing a gas mixture comprising at least one perfluorocompound gas and at least one carrier gas, the gas mixture being at a predetermined pressure; b) providing at least one glassy polymer membrane having a feed side and a permeate side; c) contacting the feed side of the at least one membrane with the gas mixture; d) withdrawing from the feed side of the membrane as a non-permeate stream at a pressure which is substantially equal to the predetermined pressure a concentrated gas mixture comprising essentially the at least one perfluorocompound gas; and e) withdrawing from the permeate side of the membrane as a permeate stream a depleted gas mixture comprising essentially the at least one carrier gas.

US Patent:

58580654, Jan 12, 1999

Filed:

Jan 16, 1997

Appl. No.:

8/783949

Inventors:

Joseph E. Paganessi - Burr Ridge IL
David Vassallo - Glenview IL
Gregory K. Fleming - Wilmington DE

Assignee:

American Air Liquide - Walnut Creek CA

International Classification:

B01D 5322

US Classification:

95 45

Abstract:

Processes and systems to recover at least one perfluorocompound gas from a gas mixture are provided. In one embodiment the inventive process comprises providing a gas mixture comprising at least one perfluorocompound gas and at least one carrier gas, the gas mixture being at a predetermined pressure; providing at least one size selective membrane having a feed side and a permeate side; contacting the feed side of the at least one membrane with the gas mixture; withdrawing from the feed side of the membrane as a non-permeate stream at a pressure which is substantially equal to the predetermined pressure a concentrated gas mixture comprising essentially the at least one perfluorocompound gas; and withdrawing from the permeate side of the membrane as a permeate stream a depleted gas mixture comprising essentially the at least one carrier gas.

US Patent:

58206590, Oct 13, 1998

Filed:

Mar 28, 1997

Appl. No.:

8/826250

Inventors:

Okan Max Ekiner - Wilmington DE
Gregory Kendall Fleming - Wilmington DE

Assignee:

L'Air Liquide, Societe Anonyme Pour L'Etude Et, L'Exploitation des
Procedes Georges Claude - Paris

International Classification:

B01D 5322
B01D 7164
B01D 7168

US Classification:

96 8

Abstract:

Gas separation membranes having enhanced selectivity for a mixture of gases is disclosed. The membranes may be asymmetric or multicomponent. The membranes surprisingly provide selectivity for gases in a mixture that approaches the relative selectivity of the single gas components. Preferably the membrane provides selectivity for a mixture of gases which is at least 65%, preferably 80%, of the relative selectivity of the corresponding single gases. A process for making improved gas separation membranes is also disclosed.