Abstract A porous diaphragm for use in separating the components of a gaseous mixture is obtained by passing through a support matrix having a pore size 10-100 microns, a suspension of particles of a size between one micron and several hundredths of a micron. The suspension may contain a surface active agent. Stainless steel is specified for the matrix, and titania for the suspension. A thin metallic film, e.g. of copper or nickel, can be deposited on the diaphragm surface.ALSO:A porous diaphragm for use in ultrafiltration is obtained by passing through a support matrix having a pore size 10-100 microns, a suspension of particles of a size between one micron and several hundredths of a micron. The suspension may contain a surface active agent. Stainless steel is specified for the matrix, and titania for the suspension. A thin metallic film can be deposited on the diaphragm surface.
IN A PROCESS FOR MAKING A POROUS MEMBRANE FOR SEPARATION BY GASEOUS DIFFUSION OF THE CONSTITUENTS OF A MIXTURE, THE STEP OF PERMANENTLY DEPOSITING SUBSICRONIC GRAINS OF A METALLIC OXIDE HAVING DIMENSIONS ON THE ORDER OF 100 TO 10,000 A, WITHIN A RIGID SINTERED METALLIC SUPPORT OF RELATIVELY LARGE PORE SIZE OF FROM TEN TO SEVERAL TENS OF MICRONS BY DRAWING BY SUCTION A SUSPENSION OF THE GRAINS IN A FLUID THROUGH THE SUPPORT.
Claim 2
Dependent Claim
74 words
IN A PROCESS FOR MAKING A POROUS MEMBRANE FOR SEPARATION BY GASEOUS DIFFUSION OF THE CONSTITUENTS OF A MIXTURE, THE STEP OF PERMANENTLY DEPOSITING SUBSICRONIC GRAINS OF A METALLIC OXIDE HAVING DIMENSIONS ON THE ORDER OF 100 TO 10,000 A, WITHIN A RIGID SINTERED METALLIC SUPPORT OF RELATIVELY LARGE PORE SIZE OF FROM TEN TO SEVERAL TENS OF MICRONS BY DRAWING BY SUCTION A SUSPENSION OF THE GRAINS IN A FLUID THROUGH THE SUPPORT.