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Cross-flow filtration device with filtrate flow conduits and method of forming same

  • US 4,781,831 A
  • Filed: 04/02/1987
  • Issued: 11/01/1988
  • Est. Priority Date: 12/19/1986
  • Status: Expired due to Term
First Claim
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1. A cross-flow filtration device for receiving a feed stock at a feed end and for separating the feed stock into filtrate and retentate, comprising:

  • a structure of porous material defining a plurality of passageways extending longitudinally from the feed end to a retentate end of the structure through which the feed stock flows to pass retentate from the device, the surface area of the passageways being at least 100 square feet per cubic foot of the structure;

    a filtrate collection zone disposed along at least one side of the structure;

    a plurality of filtrate conduits within the structure for carrying filtrate from within the structure toward the filtrate collection zone, the filtrate conduits providing paths of lower flow resistance than that of alternative flow paths through the porous material;

    the filtrate conduits being distributed among the passageways to provide low pressure drop flow paths for filtrate flow through the porous material from the passageways to nearby filtrate conduits; and

    means for isolating the filtrate collection zone from the feed and retentate ends of the structure.

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