High propane recovery process and configurations

Details High propane recovery process and configurations High propane recovery process and configurations

2005-01-04

2005-01-04

Doerrler, William C. (Department: 3744)

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

C062S632000, C062S635000, C062S636000

Reexamination Certificate

active

06837070

ABSTRACT:
A gas processing plant has a de-ethanizer (106) and a refluxed absorber (103), wherein the absorber (103) operates at higher pressure than the de-ethanizer (106), and wherein at least a portion of the absorber bottoms product (7) 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: 4657571 (1987-04-01), Gazzi
patent: 4705549 (1987-11-01), Sapper
patent: 5890378 (1999-04-01), Rambo et al.
patent: 6116050 (2000-09-01), Yao et al.
patent: 6601406 (2003-08-01), Deng et al.

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