Non-porous polymeric membrane on a porous inorganic support.

摘要

A method of forming a non-porous polymeric membrane on a porous inorganic support is disclosed. A solution of polymeric material is applied for example by solution deposition, on the surface of a porous inorganic substrate such as a honeycomb structure. The polymeric layer is then precipitated to form a continuous polymeric membrane. Precipitation is carried out using a precipitant or simply by drying the membrane. Part of the polymeric material penetrates into the walls of the porous support to give high adhesion and ensure a continuous membrane. The resulting membrane support can be used at high pressure differentials and higher throughputs. The stiff, and continuous support prevents any deformation of the polymeric membrane at higher temperatures than possible with polymeric supports. <IMAGE>