Gopala N Krishnan

US Patent:

7559969, Jul 14, 2009

Filed:

Aug 6, 2004

Appl. No.:

10/913688

Inventors:

Angel Sanjurjo - San Jose CA, US
Eugene Thiers - San Mateo CA, US
Kai-Hung Lau - Cupertino CA, US
Don L. Hildenbrand - Mountain View CA, US
Gopala N. Krishnan - Sunnyvale CA, US
Esperanza Alvarez - Menlo Park CA, US

Assignee:

SRI International - Menlo Park CA

International Classification:

C22B 34/12
C22C 14/00
C22C 33/04
C22C 32/00

US Classification:

75359, 75367, 75613

Abstract:

The present invention is generally directed towards a method for producing a solid metallic composition by reacting a gaseous metal halide with a reducing agent are described. In one embodiment, the method includes reacting a gaseous metal halide with a reducing agent in a manner effective to form a nonsolid reaction product, wherein the metal halide has the formula MX, in which M is a metal selected from a transition metal of the periodic table, aluminum, silicon, boron, and combinations thereof, X is a halogen, i is greater than 0, and the reducing agent is a gaseous reducing agent selected from hydrogen and a compound that releases hydrogen, and combinations thereof; and solidifying the reaction product, thereby forming a metallic composition comprising M that is substantially free from halides. The invention may be used to produce high-purity metallic compositions, particularly titanium particles and alloys thereof for use in powder metallurgy applications.

US Patent:

7862788, Jan 4, 2011

Filed:

Nov 18, 2008

Appl. No.:

12/272953

Inventors:

Eli Gal - Cupertino CA, US
Otto Morten Bade - Stabekk, NO
Indira Jayaweera - Freemont CA, US
Gopala Krishnan - Sunnyvale CA, US

Assignee:

ALSTOM Technology Ltd - Baden

International Classification:

B01D 53/14

US Classification:

423228, 423229, 423234, 423220, 95186, 95211, 95236, 95183, 95187, 96234, 96290

Abstract:

A chilled ammonia based COcapture system and method is provided. A promoter is used to help accelerate certain capture reactions that occur substantially coincident to and/or as a result of contacting a chilled ammonia based ionic solution with a gas stream that contains CO.

US Patent:

8168149, May 1, 2012

Filed:

Dec 2, 2010

Appl. No.:

12/958816

Inventors:

Eli Gal - Cupertino CA, US
Otto Morten Bade - Stabekk, NO
Indira Jayaweera - Freemont CA, US
Gopala Krishnan - Sunnyvale CA, US

Assignee:

ALSTOM Technology Ltd - Baden

International Classification:

B01D 53/14

US Classification:

423228, 423229, 95183, 95236

Abstract:

A method and system for COcapture from flue gas uses an absorber vessel in which a flue gas stream containing COis contacted with an ammoniated solution to remove COfrom the flue gas, and a regenerator vessel in which COis released from the ammoniated solution. Parasitic energy consumption of the system can be reduced by adding to the ammoniated solution a promoter effective to enhance the formation of ammonium bicarbonate within the ammoniated solution. The amount of ammoniated solution recycled from the regenerator vessel to the absorber vessel is less than that which would be required using the ammoniated solution without the promoter for removal of the same amount of COfrom the flue gas.

US Patent:

8465809, Jun 18, 2013

Filed:

May 4, 2007

Appl. No.:

12/299584

Inventors:

Angel Sanjurjo - San Jose CA, US
Kazunori Matsumoto - Imizu, JP
Carles Colominas - Vacarisses, ES
Gopala Krishnan - Sunnyvale CA, US
Palitha Jayaweera - Fremont CA, US
Kai-Hung Lau - Cupertino CA, US

Assignee:

SRI International - Menlo Park CA

International Classification:

B05D 1/22

US Classification:

427460, 427213, 4274345, 427580

Abstract:

A moving bed reactor system is provided. The system comprises at least one gas inlet, a distributor, a temperature control, a plurality of electrodes, and a spark control circuit. The spark control circuit drives the electrodes and generates a multi-arc discharge when the system is loaded with particles and a gas at approximately atmospheric pressure or greater is being pumped through the system. The multi-arc discharge is useful to create activated species which may improve the rate of a chemical reaction taking place in the moving bed reactor system.

US Patent:

8475540, Jul 2, 2013

Filed:

Aug 12, 2009

Appl. No.:

12/539708

Inventors:

Angel Sanjurjo - San Jose CA, US
Kai-Hung Lau - Cupertino CA, US
Xiaobing Xie - Foster City CA, US
Lorenza Moro - San Carlos CA, US
Jordi Perez Mariano - Menlo Park CA, US
Gopala N. Krishnan - Sunnyvale CA, US
Marc Hornbostel - Palo Alto CA, US
Anoop Nagar - Palo Alto CA, US

Assignee:

SRI International - Menlo Park CA

International Classification:

B01J 6/00

US Classification:

23308R, 23295 R

Abstract:

In one embodiment, the present invention relates generally to a multi-stage system for performing melt coalescence and separation, the multi-stage system. In one embodiment, the multi-stage system includes a first container for mixing a powder with a salt, the first container having an opening, a heating means coupled to the first container for heating the first container and a second container coupled to the first container.

US Patent:

20100056353, Mar 4, 2010

Filed:

Aug 27, 2009

Appl. No.:

12/549206

Inventors:

Angel Sanjurjo - San Jose CA, US
Kai-Hung Lau - Cupertino CA, US
Xiaobing Xie - Foster City CA, US
Gopala Krishnan - Sunnyvale CA, US

International Classification:

C03C 3/04
C04B 35/14

US Classification:

501 53, 501151

Abstract:

The present invention relates generally to production of a fluoride gas and equivalents thereof, and fluorine-doped sodium silicate glass, glass ceramics, vitro ceramics and equivalents thereof. In one embodiment, the method includes providing a salt and an oxide in a reactor, heating the reactor to produce a vapor and the vitro ceramic and removing the vapor.

US Patent:

20100103765, Apr 29, 2010

Filed:

Oct 22, 2009

Appl. No.:

12/604057

Inventors:

MARC D. HORNBOSTEL - Palo Alto CA, US
Angel Sanjurjo - San Jose CA, US
Kai-Hung Lau - Cupertino CA, US
Gopala N. Krishnan - Sunnyvale CA, US
Anoop Nagar - Palo Alto CA, US
Lorenza Moro - San Carlos CA, US
Jordi Perez Mariano - Menlo Park CA, US
Xiaobing Xie - Foster City CA, US
William C. Olson - San Jose CA, US

International Classification:

B01F 5/04
B01F 15/06

US Classification:

366145, 366147

Abstract:

The present invention relates generally to a liquid injector for silicon production. In one embodiment, the injector includes a tube having at least one opening at a first end of said tube, a moveable sealing means disposed inside the tube for sealing the at least one opening and a heating means coupled to the tube for controlling a temperature of a liquid exiting the tube through the at least one opening.

US Patent:

20110008235, Jan 13, 2011

Filed:

Jul 8, 2009

Appl. No.:

12/499513

Inventors:

Angel Sanjurjo - San Jose CA, US
Lorenza Moro - San Carlos CA, US
Jordi Perez Mariano - Menlo Park CA, US
Kai-Hung Lau - Cupertino CA, US
Xiaobing Xie - Foster City CA, US
Anoop Nagar - Palo Alto CA, US
Marc Hornbostel - Palo Alto CA, US
Gopala N. Krishnan - Sunnyvale CA, US

International Classification:

C01B 33/107
C01B 33/10
C22B 5/00

US Classification:

423342, 423341, 75711

Abstract:

In one embodiment, the present invention relates generally to a method for reutilizing ionic halides in a production of an elemental material. In one embodiment, the method includes reacting a mixture of an ionic halide, at least one of: an oxide, suboxide or an oxyhalide of an element to be produced and an aqueous acid solution at moderate temperature to form a complex precursor salt and a salt, forming a precursor halide from the complex precursor salt, reducing the precursor halide into the element to be produced and the ionic halide and returning the ionic halide into the mixture of the reacting step.