Methane/nitrogen separation process

Details Methane/nitrogen separation process Methane/nitrogen separation process

1996-02-29

1997-09-23

Spitzer, Robert

Gas separation: processes

Selective diffusion of gases

Selective diffusion of gases through substantially solid...

62624, 95 39, 95 96, 95143, 95144, 95237, 95240, B01D 5322, B01D 53047

Patent

active

056699581

ABSTRACT:
A membrane separation process for treating a gas stream containing methane and nitrogen, for example, natural gas. The separation process works by preferentially permeating methane and rejecting nitrogen. We have found that the process is able to meet natural gas pipeline specifications for nitrogen, with acceptably small methane loss, so long as the membrane can exhibit a methane
itrogen selectivity of about 4, 5 or more. This selectivity can be achieved with some rubbery and super-glassy membranes at low temperatures. The process can also be used for separating ethylene from nitrogen.

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