Shawn A Bratt

US Patent:

20090320519, Dec 31, 2009

Filed:

Jun 30, 2008

Appl. No.:

12/165622

Inventors:

Sarang Gadre - Bear DE, US
Shawn Bratt - Hockessin DE, US

Assignee:

American Air Liquide, Inc. - Fremont CA

International Classification:

B01D 59/16
F25J 3/00
C01B 21/04

US Classification:

62606, 62617, 96221

Abstract:

A mixture of air and one or more halogenated alkanes is directed to a gas separation membrane where it is separated into an oxygen, nitrogen, and moisture-enriched and halogenated alkane-depleted permeate and a halogenated alkane-enriched and oxygen, nitrogen, and moisture-depleted retentate. The retentate is directed to a cryogenic condenser where an amount of halogenated alkane is condensed therein.

US Patent:

20090165646, Jul 2, 2009

Filed:

Dec 31, 2007

Appl. No.:

11/967655

Inventors:

Sarang Gadre - Bear DE, US
Shawn Bratt - Hockessin DE, US

International Classification:

B01D 53/22
B01D 50/00

US Classification:

95 55, 553851

Abstract:

Effluent gas from a polysilicon reactor is directed to a gas separation membrane with a permeate gas being recycled to the reactor and the retentate being chilled with a cryogenic condenser using liquid cryogen. Liquid cryogen vaporized by the hot effluent gas may be stored or used to seal and/or chill the reactor or blanket a Si feed to a SiHCl3 reactor.