Andrew D Murphy

US Patent:

7806275, Oct 5, 2010

Filed:

May 9, 2007

Appl. No.:

11/746140

Inventors:

Andrew Patrick Murphy - Littleton CO, US
Balasingam Murugaverl - Golden CO, US
Robert Lee Riley - La Jolla CA, US

Assignee:

The United States of America as represented by the Secretary of the Interior, The Bureau of Reclamation - Washington DC
Colorado Seminary - Denver CO
Separation Systems Technology Inc. - San Diego CA

International Classification:

B01D 29/46
B01D 39/00
B01D 61/00

US Classification:

21050038, 21050037, 210490, 2103216, 21032174, 427244, 427245

Abstract:

A chlorine resistant polyamide is formed from the reaction product of an amine and an acid chloride monomer wherein the acid chloride monomer is modified with electron-withdrawing groups that exhibit sufficient activity to (i) minimize any chlorination on both the amine and acid chloride side and (ii) minimize N-chlorination. A membrane is made from the polyamide and, in one application, the membrane is used in a desalination unit.

US Patent:

8123945, Feb 28, 2012

Filed:

May 9, 2007

Appl. No.:

11/746288

Inventors:

Andrew Patrick Murphy - Littleton CO, US
Saied Delagah - Denver CO, US
Robert Lee Riley - La Jolla CA, US

Assignee:

The United States of America as represented by the Secretary of the Interior, The Bereau of Reclamation - Washington DC
Separation Systems Technology Inc. - San Diego CA

International Classification:

B01D 11/00
B01D 39/14
B01D 71/16

US Classification:

210634, 21050029, 2105003

Abstract:

A method is provided for producing a high flux, high salt rejection cellulose acetate desalination membrane. In this method, cellulose acetate polymer is dissolved in a first solvent such as methylene chloride or 2-methyltetrahydrofuran to produce a solution. Further steps involve stirring the solution, and thereafter permitting the solution to settle, for a time sufficient for a majority of the cellulose acetate to precipitate out of the solution to form a cellulose acetate precipitate. Next, the cellulose acetate precipitate is stirred into an excess methanol. Thereafter, the cellulose acetate is filtered out and used in making the desalination membrane.

US Patent:

20110203990, Aug 25, 2011

Filed:

Aug 23, 2010

Appl. No.:

12/861233

Inventors:

Andrew Patrick Murphy - Littleton CO, US
Balasingam Murugaverl - Golden CO, US
Robert Lee Riley - La Jolla CA, US

International Classification:

B01D 71/56
C08G 69/26
C07C 63/70
C07C 205/57
C07C 57/76

US Classification:

21050038, 528350, 562855, 562853

Abstract:

A chlorine resistant polyamide is formed from the reaction product of an amine and an acid chloride monomer wherein the acid chloride monomer is modified with electron-withdrawing groups that exhibit sufficient activity to (i) minimize any chlorination on both the amine and acid chloride side and (ii) minimize N-chlorination. A membrane is made from the polyamide and, in one application, the membrane is used in a desalination unit.

US Patent:

20140042082, Feb 13, 2014

Filed:

Aug 10, 2012

Appl. No.:

13/572431

Inventors:

Andrew P. Murphy - Littleton CO, US
Robert L. Riley - La Jolla CA, US
Yuliana E. Porras Mendoza - Arvada CO, US

International Classification:

B01D 71/56
C08G 69/00

US Classification:

21050033, 21050038, 528372

Abstract:

A chlorine resistant polyamide is formed from the reaction product of an amine and an acid chloride monomer wherein both the amine and the acid chloride monomer are modified with electron-withdrawing groups that exhibit sufficient activity to (i) minimize any chlorination on both the amine and acid chloride and (ii) minimize N-chlorination. A membrane is made from the polyamide for use, for example, in a desalination unit.

US Patent:

56038445, Feb 18, 1997

Filed:

Jun 6, 1995

Appl. No.:

8/468403

Inventors:

Andrew P. Murphy - Littleton CO
Lisa H. Rowley - Evergreen CO

Assignee:

The United States of America as represented by the Secretary of the
Interior - Washington DC

International Classification:

C02F 170

US Classification:

210757

Abstract:

Chemical-free autodecomposition of chlorine species to chloride ion and oxygen gas by contacting a chlorine containing liquid solution with a decomposition catalyst consisting of transition metals and their compounds in association with a high surface area per mass. The catalyst comprises Raney metals selected from the group including Raney Cu, Raney Ni, and Raney Co, and aluminum doped with transition metals selected from the group including vanadium, chromium, manganese, iron, cobalt, nickel, copper and zinc.

US Patent:

61768995, Jan 23, 2001

Filed:

Sep 17, 1998

Appl. No.:

9/161603

Inventors:

Andrew P. Murphy - Littleton CO
Robert Lee Riley - La Jolla CA
Scott Roy Irvine - Littleton CO

Assignee:

The United States of America as represented by the Secretary of the
Interior - Washington DC

International Classification:

B01D 1900

US Classification:

95263

Abstract:

A method of degassing a volume of supersaturated liquid is provided which comprises introducing a plurality of microbubbles of gas substantially near the bottom of the volume of supersaturated liquid so that the microbubbles percolate up through the volume of supersaturated liquid to thereby effect removal of dissolved gas in the volume of the supersaturated liquid at the top of the volume. In one embodiment, the step of introducing microbubbles comprises introducing the microbubbles by recirculating deionized water through a hollow fiber microfiltration membrane. In another embodiment, the step of introducing microbubbles comprises introducing the microbubbles through a pipe from the turbine of a dam. In most applications, the volume of supersaturated liquid is water and the microbubbles of gas comprise air. The volume of supersaturated water advantageously comprises a volume of a river, lake or stream which is near a dam with a turbine.

US Patent:

53325095, Jul 26, 1994

Filed:

Feb 24, 1993

Appl. No.:

8/021437

Inventors:

Andrew P. Murphy - Littleton CO

Assignee:

The United States of America as represented by the Secretary of the
Interior - Washington DC

International Classification:

C02F 162

US Classification:

210719

Abstract:

A chemical process for selectively removing organometallic compounds from water supplies. The process utilizes a combination of a transition metal selected from the group consisting of nickel, copper, iron and zinc, and an electropositive metal selected from the group consisting of magnesium and aluminum to effectively remove organometallic compounds from water whether present in ionic or non-ionic form.

US Patent:

54048346, Apr 11, 1995

Filed:

Mar 15, 1993

Appl. No.:

8/031448

Inventors:

Andrew P. Murphy - Littleton CO

Assignee:

The United States of America as represented by the Secretary of the
Interior - Washington DC

International Classification:

G01K 532

US Classification:

116216

Abstract:

An indicator device indicates that the temperature in a location in which the device is placed has exceeded a predetermined maximum temperature value. The he device includes a liquid receptacle comprising frangible bulb portion and an integral capillary portion and an absorbent card to which said receptacle is secured. The bulb portion contains a first liquid and the capillary portion contains a second liquid which is insoluble in said first liquid. The second liquid has a freezing point higher then that of the first liquid and close to but greater than the predetermined temperature value so that when the device is placed in a location which has temperature lower than the predetermined value and in which the predetermined value is to be maintained, the second liquid freezes in the capillary tube and prevents the first liquid from expanding. Thus, if the temperature in the monitored location increases such that expansion of the first liquid causes breakage of the frangible bulb and the release of the first liquid that liquid will cause staining of the absorbent card to provide an indication that the predetermined value has been exceeded within the location.