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Membrane-based removal of condensable vapors

  • US 5,236,474 A
  • Filed: 09/09/1992
  • Issued: 08/17/1993
  • Est. Priority Date: 09/13/1991
  • Status: Expired due to Fees
First Claim
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1. A process for removing and recovering a condensable vapor from a gas stream comprising the steps:

  • (a) providing at least one hollow fiber membrane having a feed side and a permeate side;

    (b) contacting the feed side of said membrane with a gas stream containing a condensable vapor;

    (c) contacting the permeate side of said membrane with a cool extraction fluid, the total permeate side pressure being less than the total feed side pressure said total permeate side pressure being maintained by throttling said cool extraction fluid with a throttle valve after said fluid has been pressurized with a liquid circulation pump and prior to contact with said permeate side; and

    (d) entraining in said cool extraction fluid on the permeate side condensed vapor from said gas stream.

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