Refrigeration – Cryogenic treatment of gas or gas mixture – Separation of gas mixture
Reexamination Certificate
2005-11-08
2005-11-08
Doerrler, William C. (Department: 3744)
Refrigeration
Cryogenic treatment of gas or gas mixture
Separation of gas mixture
C062S647000
Reexamination Certificate
active
06962062
ABSTRACT:
A method for separating air by cryogenic distillation. A first compressor compresses air to a first pressure, and sends part of that air to a second compressor which compresses that part to a second pressure. Part of the air at the second pressure is cooled in a heat exchanger and sent to a third compressor where part of it is compressed to a third pressure. Part of the air at the third pressure is liquefied and sent a column system. Around half of the total liquefied air sent to the column system will have originally been compressed by the third compressor. Part of the air at the first pressure is cooled in a heat exchanger and part of the cooled air at the first pressure is then expanded to the pressure of the column system. The expanded air is sent to the column system.
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International Search Report for PCT/IB2004/003925.
Brugerollle Jean-Renaud
Ha Bao
Doerrler William C.
L'Air Liquide, Société Anonyme à Directoire et Co
Russell Linda K.
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