Patent ID: 8221524
Filing Date: 2012-07-17
Classification: B01D,C10L,Y02C,Y02E,Y10S

Abstract:
1. A process for the improved separation of oxygen from a natural gas feed stream which comprises: a. passing said natural gas feed stream to a first separation unit so as to partially separate oxygen from said feed stream and produce a first product stream enriched with methane and a waste stream having a higher molar concentration of oxygen than said feed stream; and b. passing said first product stream to a second separation unit containing an oxygen-selective adsorbent comprising a carbon molecular sieve and operated with a pressure swing so as to preferentially adsorb residual said oxygen from said first product stream to produce a low pressure gas stream enriched with oxygen and produce a higher pressure second product stream enriched with methane and having an oxygen content of less than 2,000 ppm.