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Membrane separation of organics from aqueous solutions

  • US 4,218,312 A
  • Filed: 12/01/1975
  • Issued: 08/19/1980
  • Est. Priority Date: 12/01/1975
  • Status: Expired due to Term
First Claim
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1. A process for separating neutral organics from an aqueous solution comprising:

  • contacting an aqueous solution containing neutral organics having at least about four carbon atoms per molecule selected from the group consisting of alkanols, alkyl benzenes and organic nitriles with a first surface of a hydrophobic polymeric membrane comprised of an aliphatic nylon selectively permeable to the neutral organic components contained in the aqueous solution, maintaining a second and opposite membrane surface at a lower chemical potential than the first membrane surface for the neutral organic components, permeating a portion of the neutral organic components into and through the membrane, and withdrawing at the second membrane surface a vapor mixture having a higher total concentration of said neutral organic components than the total concentration of said neutral organic components in the aqueous solution contacting said first surface.

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