B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 53/22 (2006.01) C01B 21/04 (2006.01) C01B 23/00 (2006.01)
Patent
CA 2057253
- 31 - THREE-STAGE MEMBRANE GAS SEPARATION PROCESS AND SYSTEM Abstract of the Disclosure Very high purity nitrogen is produced by air separation in a three stage membrane system in which the third stage permeate is recycled to the second stage and the membrane surface area is distributed between the stages to achieve high product recovery and process performance. Other gas separations, such as argon from oxygen, can likewise be achieved by thus using a three stage membrane system. D-16497
Praxair Technology Inc.
Sim & Mcburney
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