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Mixed matrix membrane with super water washed silica containing molecular sieves and methods for making and using the same

  • US 7,268,094 B2
  • Filed: 08/18/2003
  • Issued: 09/11/2007
  • Est. Priority Date: 08/18/2003
  • Status: Expired due to Fees
First Claim
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1. A method for preparing silica containing molecular sieves which may be mixed with an organic polymer to create a mixed matrix membrane, the method comprising:

  • washing silica containing molecular sieves with a basic water solution having a pH of at least 9; and

    water washing the silica containing molecular sieves sufficiently to produce water washed molecular sieves which are substantially free of surface remnants, such that when the water washed molecular sieves are subjected to a Sieve Wash Conductivity Test, a wash filtrate is produced having a conductivity of less than 110 micro mhos/cm.

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