Gas dehydration membrane with low oxygen and nitrogen permeabili

Details Gas dehydration membrane with low oxygen and nitrogen permeabili Gas dehydration membrane with low oxygen and nitrogen permeabili

1997-09-24

2000-07-04

Spitzer, Robert

Gas separation: processes

Selective diffusion of gases

Selective diffusion of gases through immobilized liquid

95 52, 96 5, 96 11, B01D 5322, B01D 5326

Patent

active

060832975

ABSTRACT:
The invention relates to a gas dehydration membrane comprising a membrane having pores communicating between a first and an opposing second surface of the membrane and further having an average pore diameter on the first surface of the membrane which is about 10 to 1000 times smaller than that on the opposing second surface of the membrane. The invention further relates to a process for dehydrating a gaseous feedstock comprising passing the gaseous feedstock over a membrane characterized by high surface porosity wherein pore openings on a first surface thereof are at least 10 to 1000 times smaller than pore openings on an opposing surface thereof and wherein from about 2% to about 30% of the pore volume is occupied by a humectant.

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