Neil A Stephenson

US Patent:

6547859, Apr 15, 2003

Filed:

Nov 21, 2000

Appl. No.:

09/716262

Inventors:

Joseph Timothy Mullhaupt - Williamsville NY
Neil Andrew Stephenson - East Amherst NY
Frank Notaro - Amherst NY
Ravi Prasad - East Amherst NY

Assignee:

Praxair Technology, Inc. - Danbury CT

International Classification:

B01D 5322

US Classification:

96 4, 95 51, 95 54, 96 10, 55524, 55DIG 5

Abstract:

A process for making microporous membranes that incorporate selected gas selective species as surface sites in a controlled spacing and orientation manner and such membranes so formed being suitable for separating and purifying the selected gas from selected gas containing gas mixtures. An example is the use of oxygen selective transition element complexes (TECs) as surface sites for separating and purifying oxygen from oxygen-containing gas mixtures.

US Patent:

6632767, Oct 14, 2003

Filed:

Dec 19, 2000

Appl. No.:

09/739280

Inventors:

Qisheng Huo - East Amherst NY
Neil Andrew Stephenson - East Amherst NY

Assignee:

Praxair Technology, Inc. - Danbury CT

International Classification:

B01J 2906

US Classification:

502 64, 502 60, 502 65, 502 66

Abstract:

The low stability of some molecular sieves can be overcome during calcination by a solid state reaction between the molecular sieve and a salt. Molecular sieves including zeolites, metal substituted aluminosilicates, and metallosilicates can be stabilized by this method. The inventive process comprises mixing such molecular sieve with a salt, either directly or as a slurry; and then heating the resulting mixture to remove water, organics and adsorbed species.

US Patent:

6989044, Jan 24, 2006

Filed:

Nov 30, 2000

Appl. No.:

09/725845

Inventors:

Delong Zhang - Grand Island NY, US
Neil Andrew Stephenson - East Amherst NY, US

Assignee:

Praxair Technology, Inc. - Danbury CT

International Classification:

B01D 53/047

US Classification:

95 90, 95 95, 95 96, 95102, 95116, 95138, 95140, 95900, 96143, 423210, 423219, 423247, 502401

Abstract:

A process and composition for selectively adsorbing oxygen from a gaseous mixture. The chemisorption is carried out by a porous three-dimensional transition element complex comprised of intermolecularly bound TEC units, said units further comprised of at least one multidentate ligand forming at least one five- or six-membered chelate ring on each unit.

US Patent:

7827854, Nov 9, 2010

Filed:

Jul 1, 2008

Appl. No.:

12/166061

Inventors:

Neil Andrew Stephenson - East Amherst NY, US
Phillip Alexander Barrett - Tonawanda NY, US
Steven J. Pontonio - Eden NY, US
Michael T. Freiert - Tonawanda NY, US
Jesus Gallego-Preciado Nieto - Grand Island NY, US

Assignee:

Praxair Technology, Inc. - Danbury CT

International Classification:

G01N 5/00

US Classification:

73 73, 96417, 96422

Abstract:

The present invention generally relates to methods and kits for measuring and analyzing degradation of adsorbent materials, particularly for adsorbent materials used in gas separation processes. The present invention can assess the damage to adsorbent due to moisture contamination and it can assess damage that is not moisture-related. The advantage to the present invention is that it can detect degradation of adsorbent before the degradation affects production. Another advantage is that it can conclusively determine whether the sieve is damaged. Because it is so inexpensive to run, the test of the present invention can be conducted to determine adsorbent damage and to confirm whether the damage continues to be an issue. The present invention can test adsorbents in any form, including, but not limited to, bead, pellet or powder form.

US Patent:

8123835, Feb 28, 2012

Filed:

Mar 10, 2008

Appl. No.:

12/529198

Inventors:

Jian Zheng - Williamsville NY, US
Steven John Pontonio - Eden NY, US
Neil Andrew Stephenson - East Amherst NY, US
Philip Alexander Barrett - Tonawanda NY, US

Assignee:

Praxair Technology, Inc. - Danbury CT

International Classification:

B01D 53/04
B01J 20/18
B01J 20/28

US Classification:

95 90, 95902, 502 79, 502411

Abstract:

High rate and high crush-strength adsorbent particles and collections of such particles, and particularly LiLSX particles, are provided. A binder is employed in the form of a colloidal solution during the method of manufacture. Suitable binders include various silica binders. The particles are made using the steps of mixing, agglomeration, calcination and in the case of certain adsorbents such as LiX and LiLSX, ion exchange and activation. When the adsorption rate is expressed in the form SCRR/ε(mmol mm/g s), desirable collections of adsorbent particles can have values of at least 4. 0 for the highly-exchanged Li (at least 90% Li exchanged) form of the collection of particles and can further be characterized by particles having average crush strengths of at least 0. 9 lbf for particles having an average diameter of at least about 1. 0 mm.

US Patent:

20130036904, Feb 14, 2013

Filed:

Aug 10, 2011

Appl. No.:

13/206773

Inventors:

JIAN ZHENG - Williamsville NY, US
Neil Andrew Stephenson - East Amherst NY, US
Philip Alexander Barrett - Tonawanda NY, US

International Classification:

B01D 53/04
B01D 53/047

US Classification:

95 26, 96115, 96153

Abstract:

The present invention relates generally to a composite adsorbent comprising at least a zeolite-containing COremoval adsorbent and 10% or more of a metal oxide having a heat capacity of at least 20 cal/mol- K (83.7 J/(molK). The composite is preferably used in a multi-layered adsorption system in a cyclic adsorption process. The adsorption system comprises two or more layers wherein the first layer is at least a water vapor removal adsorbent, such as activated alumina, and the second layer is the novel composite adsorbent. The adsorption system is preferably used in a PSA prepurification process prior to cryogenic air separation.

US Patent:

20130340612, Dec 26, 2013

Filed:

Jun 22, 2012

Appl. No.:

13/530209

Inventors:

MARK WILLIAM ACKLEY - Tonawanda NY, US
Philip Alexander Barrett - Tonawanda NY, US
Neil Andrew Stephenson - East Amherst NY, US
Eustathios S. Kikkinides - Thessaloniki, GR

International Classification:

B01J 20/28
B01J 20/26
B01D 53/02
B01J 20/18

US Classification:

95 90, 502400, 502 60, 502 79, 502402

Abstract:

The present invention relates generally to compositions useful in adsorption and reactive processes comprising an adsorbent powder, such as a zeolite, and a binder mixed to form an agglomerate having a porosity of 0.30≦ε≦0.42 and a Npore diffusivity D≧3.5×10m/s and wherein the mean particle diameter of the crystalline zeolite powder is 10 μm or less; the mean particle diameter of the binder is 0.10 dor less, and the binder concentration is 10% or less expressed on a dry weight basis.

US Patent:

20130340614, Dec 26, 2013

Filed:

Jun 22, 2012

Appl. No.:

13/530236

Inventors:

PHILIP ALEXANDER BARRETT - TONAWANDA NY, US
STEVEN JOHN PONTONIO - EDEN NY, US
PERSEFONI KECHAGIA - WILLIAMSVILLE NY, US
NEIL ANDREW STEPHENSON - EAST AMHERST NY, US

International Classification:

B01J 20/18
B01D 53/047
B01D 53/02

US Classification:

95 96, 95 90, 502 64

Abstract:

Adsorbent compositions useful in adsorption, separation and purification processes are made using silicone-derived binding agents. The adsorbent compositions having enhanced adsorption rate and crush strength properties are made from agglomerated crystallite particles bound with silicone-derived binding agents. The silicone binder precursors are calcined during the manufacturing process to produce the silicone-derived binding agents. The adsorbent compositions are preferably used in air separation processes.