Process to separate nitrogen and methane

Details Process to separate nitrogen and methane Process to separate nitrogen and methane

1986-02-07

1987-05-12

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

62 28, 62 31, 62 36, 62 42, F25J 302

Patent

active

046646868

ABSTRACT:
A process for more efficiently separating nitrogen and methane using a double column cryogenic rectification nitrogen rejection unit wherein feed is passed through a high pressure stripping column prior to the nitrogen rejection unit. As a result, higher pressure methane can be recovered with reduced compression requirements, and an upgraded feed to the nitrogen rejection unit enables more efficient separation.

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