Patent ID: 6193883
Filing Date: 2001-02-27
Classification: B01D,C12M

Abstract:
A filtration apparatus for separating and/or enriching dissolved substances from a suspension, said apparatus comprising:a housing accommodating at least one rotor and at least one filter device;said rotor comprising a rotationally symmetrical conical rotor having a conical section whose apex is directed towards one of said at least one filter device, the cone angle of said conical section being from 3.degree. to 4.degree., such that a virtually homogenous shear field and a virtually constant pressure gradient are produced across an in-flow section of said filter device;said filter device comprising a plurality of layers of surface modified membranes or comprising a filter membrane followed by a chromatographic column on the filtrate side of the filter membrane,wherein the ratio s/r of a maximum gap width s between the filter device surface nearest said rotor and said rotor, to the maximum radius r of said rotor, is less than 0.2.