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Gas separations using mixed matrix membranes

  • US 6,503,295 B1
  • Filed: 09/20/2000
  • Issued: 01/07/2003
  • Est. Priority Date: 09/20/2000
  • Status: Expired due to Term
First Claim
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1. A process for separating two gases having different molecular sizes in the range of about 2.5 Angstroms to about 5.0 Angstroms in a feedstream including these two gas components, the process comprising:

  • (a) providing a polymer membrane having feed and permeate sides that incorporates carbon-based molecular sieve particles and that is selectively permeable to a first gas component over a second gas component, and (b) directing a feedstream including the first and second gas components to the feed side of the membrane and withdrawing a retentate stream depleted in the first gas component and withdrawing a permeate stream enriched in the first gas component from the permeate side of the membrane;

    wherein the selectivity of the first gas component through the particles is greater than the selectivity of the first gas component through the polymer.

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