Patent ID: 6312591
Filing Date: 2001-11-06
Classification: B01D,G01N

Abstract:
A filtration cell for carrying out a tangential flow filtration of a sample liquid comprising:at least two blocks;at least two filtration elements arranged between said blocks;each said filtration element having an outlet for a filtrate and comprising a sheet of support material for collecting the filtrate, and two generally flat ultrafiltration or microfiltration membranes arranged on either side of the support material in a sandwich construction;each of the blocks at a side adjacent the membranes being provided with a respective channel for feeding a flow of sample liquid tangentially over the membranes such that each channel is connected to parallel with an inlet for the flow of sample liquid to be filtered and with an outlet for a concentrated solution;each channel including in its longitudinal direction a number of subsequent flow channel sections separated by transitional zones; each section being associated with a main flow direction; andsaid channel sections being structured and arranged such that the main flow direction in subsequent flow channel sections changes abruptly when the flow passes a transitional zone.