Cross flow microfilter

Details Cross flow microfilter Cross flow microfilter

1986-12-24

1989-01-10

Spear, Frank

Liquid purification or separation

Casing divided by membrane into sections having inlet

Planar membrane

210456, 21050025, 21050026, B01D 1300

Patent

active

047972114

ABSTRACT:
A cross flow microfilter comprises a filter housing having a flow chamber wherein a fluid is introduced on one side and a concentrate is removed on the opposite side a collection chamber from which a filtrate is removed, and at least one microporous membrane over whose one surface the fluid to be filtered flows in a parallel stream and whose other surface is oriented toward the collection chamber, the membrane having pores of a width between about 0.1 micron and 30 micron, the improvement wherein the pores of the membrane have slit-shaped cross-sections and given profiles, and are formed by a plurality of webs arranged in rows with predetermined spacing and by terminating plates which cover the webs, and the webs are applied onto one of the two plates by X-ray lithographic means, X-ray depth lithographic-galvanoplastic means, or molding and galvanoplastic means.

REFERENCES:
patent: 3303254 (1967-02-01), Simons
patent: 3438504 (1969-04-01), Furman
patent: 4110220 (1978-08-01), Lavender
patent: 4405688 (1983-09-01), Lowery et al.
patent: 4579662 (1986-04-01), Jonsson
A. E. Ostermann, Cross Flow Microfiltration in Industrial Use-Overview of Present Materials for Seminar No. 116125, Technical Academy, Wuppertal, May 1985.
E. W. Becker, W. Ehrfeld, P. Hagmann, A. Maner, D. Munchmeyer, KFK Report No. 3995 by Kernforschungszentrum Karlsruhe (Nov., 1985).
Nuclepore, Falkenweg 47, Nuclepore Membrantechnologie.

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