Patents Represented by Attorney Lundeen & Dickenson, L.L.P.

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  • Liquid—liquid extraction apparatus and method
    Patent number: 6962661
    Abstract: Method and apparatus for contacting two liquid phases for liquid-liquid extraction in a vertical extraction vessel. A relatively heavier liquid phase, descending the extraction vessel at a relatively low volumetric flow rate, is dispersed into a continuous phase comprising a relatively lighter liquid rising through the extraction vessel at a relatively high flow rate. Sieve trays are provided with adjustable active areas and overlapping manways for personnel access.
    Type: Grant
    Filed: September 2, 2003
    Date of Patent: November 8, 2005
    Assignee: Kellogg Brown & Root, Inc.
    Inventors: Aldrich Holt Northup, Jr., Michael Robert Resetarits, Neil Anthony Sandford, Pamela Jo Tokerud, Gary Wayne Gage, Veada Colic