Patent ID: 7784621
Filing Date: 2010-08-31
Classification: B01D,C02F

Abstract:
1. A membrane suitable for ultrafiltration, comprising an inorganic membrane characterized by the following elements: (a) before being treated as described in element (b) below, the inorganic membrane has a porous feed surface with an average pore diameter in the range 10-1,000 Å and is able to function as an ultrafiltration membrane; (b) the inorganic membrane has been treated by depositing an organic polymer on the porous feed surface; (c) after being treated as described in element (b) above, the inorganic membrane continues to be able to function as an ultrafiltration membrane but is unable to function as a solution-diffusion gas separation membrane, wherein the organic polymer forms a discontinuous deposit on the porous feed surface.