Refrigeration – Cryogenic treatment of gas or gas mixture – Separation of gas mixture
Reexamination Certificate
2006-07-11
2006-07-11
Doerrler, William C. (Department: 3744)
Refrigeration
Cryogenic treatment of gas or gas mixture
Separation of gas mixture
C062S632000, C062S635000, C062S636000
Reexamination Certificate
active
07073350
ABSTRACT:
A gas processing plant has a de-ethanizer and a refluxed absorber, wherein the absorber operates at higher pressure than the de-ethanizer, and wherein at least a portion of the absorber bottoms product is expanded to provide cooling for the absorber reflux stream and/or the distillation column feed stream. Especially contemplated gas processing plants include propane and ethane recovery plants, and where the gas processing plant is an ethane recovery plant, it is contemplated that the ethane product comprises no more than 500 ppm carbon dioxide.
REFERENCES:
patent: 4705549 (1987-11-01), Sapper
patent: 6837070 (2005-01-01), Mak
Doerrler William C.
Fluor Technologies Corporation
Rutan & Tucker LLP
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