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Separation device

  • US 4,685,940 A
  • Filed: 07/30/1985
  • Issued: 08/11/1987
  • Est. Priority Date: 03/12/1984
  • Status: Expired due to Term
First Claim
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1. A carbon membrane for separating two gases having different size molecules in a range of 2.5 Å

  • to 5.0 Å

    , wherein the molecules of each gas differ from one another in size by an amount not greater than 10%, said membrane having pores of a preselected size which also is in the range of 2.5 Å

    to 5.0 Å and

    which is intermediate the molecule sizes of the two gases to be separated, and said membrane having a pore size distribution which is such that the membrane has no significant number of pores which are 10% or greater in size than the smaller of the molecule sizes of the two gases.

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