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1-10 of 75 patent results

Integrated heat exchanger system for producing carbon dioxide

U.S. Application | Pub No. US20010004838 | Filed: 01/09/2001 | Published: 06/28/2001
Inventor(s): Dante Bonaquist + 2
A system for producing carbon dioxide wherein carbon dioxide feed fluid is first processed in a cooling section of an integrated heat exchanger before purification in a column, and wherein column b...

Apparatus for analysis of impurities in liquid carbon dioxide

U.S. Application | Pub No. US20010032479 | Filed: 06/22/2001 | Published: 10/25/2001
Inventor(s): Wilfried Krone-Schmidt + 1
Liquid CO2 is expanded in specially designed primary and secondary nozzles to produce frozen solid CO2. The impurities initially contained in the liquid CO2 are trapped inside of the frozen CO2, wh...

Defrosting method and apparatus for a refrigeration system

U.S. Patent US5319940 | Filed: 05/24/1993 | Issued: 06/14/1994
Inventor(s): Robert Yakaski | Agent(s): Michael J. Delaney
Method and apparatus to defrost evaporator coils of a refrigeration system by periodically replacing the refrigerant in the evaporator coils by hot refrigerant gas from the compression side of a co...

Chemical purification for semiconductor processing by partial condensation

U.S. Patent US5426944 | Filed: 08/31/1993 | Issued: 06/27/1995
Assignee(s): American Air Liquide, Inc. | Inventor(s): Yao-En Li + 1 | Agent(s): Townsend and Townsend Khourie and Crew
A purification method and apparatus for creating ultra-purity chemicals for semiconductor processing. The purification method includes a step of expanding an ESG chemical through an orifice (17) in...

Control vent system for ultra-high purity delivery system for liquefied compressed gases

U.S. Patent US6085548 | Filed: 08/24/1998 | Issued: 07/11/2000
Assignee(s): Air Products and Chemicals, Inc. | Inventor(s): Naser Mahmud Chowdhury + 5 | Agent(s): Geoffrey L. Chase
A control vent system is disclosed for reducing volatile impurities in a gaseous product of ultra-high purity delivered from a storage vessel containing an inventory of a non-cryogenic liquid produ...

Chlorine recovery process

U.S. Patent US4128409 | Filed: 02/08/1977 | Issued: 12/05/1978
Assignee(s): Tioxide Group Limited | Inventor(s): Anthony E. Bennett | Agent(s): Schuyler, Birch, Swindler, McKie & Beckett
Process for the recovery of chlorine from chlorine-containing gas mixtures in a multi-stream heat exchanger wherein the chlorine-containing mixtures are separated from other gases which would solid...

Heat exchanger apparatus

U.S. Patent US4444016 | Filed: 05/20/1981 | Issued: 04/24/1984
Assignee(s): Airco, Inc. | Inventor(s): Ratan Banerjee | Agent(s): David L. Rae
A vapor component of a gas mixture is separated by condensation and is recovered for further use. A solvent vapor mixed with inert gas is condensed in a multistage heat exchange system in a manner ...

Method for carbon dioxide recovery from a feed stream

U.S. Patent US5974829 | Filed: 06/08/1998 | Issued: 11/02/1999
Assignee(s): Praxair Technology, Inc. | Inventor(s): Richard A. Novak + 3 | Agent(s): Bharat C. Gandhi
The method of the invention recovers CO.sub.2 from an inlet cold feed stream containing a low concentration thereof, and includes the following steps. An inlet feed stream is passed through a heat ...

Process for separating pentafluoroethane and 1,1,1-trifluoroethane

U.S. Patent US6047560 | Filed: 03/12/1998 | Issued: 04/11/2000
Assignee(s): Showa Denko K.K. | Inventor(s): Atsuo Nishimura + 2 | Agent(s): Sughrue, Mion, Zinn Macpeak & Seas, PLLC
A process for separating pentafluoroethane and 1,1,1-trifluoroethane, which comprises extraction distilling a mixed fluid comprising pentafluoroethane and 1,1,1-trifluoroethane in the presence of a...

Apparatus for treating an exhaust gas from nuclear plant

U.S. Patent US4038060 | Filed: 04/23/1975 | Issued: 07/26/1977
Assignee(s): Ltd. Hitachi | Inventor(s): Kunio Kamiya + 3 | Agent(s): Pollock, Vande Sande & Priddy
In an apparatus for treating an exhaust gas from a nuclear plant which comprises a container and a cryogenic distillation apparatus disposed in the container for liquefying and separating a radioac...