Loading patent…
AssigneeHoogovens Groep B.V.
InventorsWillem H. Van 'T Veen, Albertus J. G. Engel, Benedictus C. Bonekamp, Hubertus J. Veringa, Rinse A. Terpstra
Estimating the term…
A microporous ceramic membrane comprising a porous support and a microporous layer firmly bound to each other, with a sharp geometric transition between the support and the microporous layer, the microporous layer being free of pin-holes. The microporous membrane has a predetermined average pore diameter and it is suitable for microfiltration. The membrane can comprise further microporous layers making it suitable for ultrafiltration and hyperfiltration. The membrane can be prepared by suspension coating of a support, whereby the support and/or the suspension are pretreated in order to lower temporarily the affinity between the support and the suspension.
A two layer microporous membrane consisting of a porous ceramic support having pore sizes between 0.1 .mu.m and 50 .mu.m and only one microporous sintered inorganic layer, wherein the microporous layer is bonded directly to the geometric outer surface of the porous support, thereby substantially spanning the pores of the support, with a sharp transition in permeability between the microporous layer and the porous support, the microporous layer having a predetermined average pore diameter between 20 nm and 1 .mu.m, and being essentially free of pin-holes.
Dependencies are inferred from the claim text.