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US 5,127,925 AGranted
Separation of gases by means of mixed matrix membranes
AssigneeAllied-Signal Inc.
InventorsSanti Kulprathipanja, Richard W. Neuzil, Norman N. Li
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AssigneeAllied-Signal Inc.
InventorsSanti Kulprathipanja, Richard W. Neuzil, Norman N. Li
Estimating the term…
A fluid feed mixture, either liquid or gaseous in nature, may be subjected to a gas enrichment separation process. The process is effected by contacting the mixture with the upstream face of a mixed matrix membrane which comprises an organic polymer having a solid particulate adsorbent incorporated therein, the permeability coefficient of the organic polymer being compatible with the permeability coefficient of the adsorbent. The permeate which emanates from the downstream face of the membrane comprises a fluid product mixture in which the proportion of the first fluid component of the feed mixture, which possesses a greater steady state permeability in relation to the second fluid component, is greater than the proportion present in the original fluid feed mixture.
A process for the separation of oxygen and nitrogen from a gaseous feed mixture containing same by contacting, at separation conditions, said mixture with the upstream face of a solution cast mixed matrix membrane, consisting essentially of polysilicone having a solid particulate adsorbent incorporated therein, the steady state separation factor for oxygen in nitrogen being increased compared to the steady state separation factor of a membrane consisting of said polysilicone without said solid particulate adsorbent, said oxygen having a greater steady state permeability than said nitrogen, and recovering from the downstream face of said membrane after said contacting, a permeate which comprises said oxygen in greater proportion than said nitrogen.
Dependencies are inferred from the claim text.