Ultrafiltration process and apparatus using low hydrostatic pres

Details Ultrafiltration process and apparatus using low hydrostatic pres Ultrafiltration process and apparatus using low hydrostatic pres

1974-07-18

1976-08-10

Spear, Jr., Frank A.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 75, 210321R, 210433M, B01D 3100, B01D 1300

Patent

active

039740684

ABSTRACT:
Liquids containing microorganisms, macromolecules or finely-divided solid matter in a liquid are filtration-concentrated by movement of the liquid containing such particles through an elongated tubular channel having membrane filters, as walls thereof, with flat surfaces and pore diameters between 10.sup..sup.-2 mm and 10.sup..sup.-4 mm, preferably 2.times.10.sup..sup.-4 to 3.times.10.sup..sup.-4 mm. Laminar flow is maintained at the filter surface and forced transverse movement of contained particles into the filter is provided through a moderate static pressure head. The particle movement is in some embodiments supplemented by heavier particles used to transfer momentum to particles to be filtered thereby. Clogging of the filters is thereby reduced with resultant longer service life and longer intervals between filter maintenance or replacement.

REFERENCES:
patent: 3148141 (1964-09-01), Schonenberger et al.
patent: 3367787 (1968-02-01), Thijssen et al.
patent: 3462362 (1969-08-01), Kollsman
patent: 3472765 (1969-10-01), Budd et al.
patent: 3483867 (1969-12-01), Markovitz
patent: 3490590 (1970-01-01), Davies
patent: 3494465 (1970-02-01), Hyrop
patent: 3541006 (1970-11-01), Bixler et al.
patent: 3579441 (1971-05-01), Brown
patent: 3705100 (1972-12-01), Blatt et al.
Michaels, "New Separation Techniques for the CPI", from Chem. Eng. Progress, vol. 64, No. 12, copy in Gp. 176, pp. 31-43, Dec., 1968.

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