ION-PERMEABLE DIAPHRAGMS FOR ELECTROLYTIC CELLS

摘要

Improved diaphragms for electrolytic cells which comprise a woven organic fabric embedded in a film forming mixture consisting of a particulate inorganic hydrophilic material and an organic polymeric binder, as well as a method of producing the same which comprises the steps of i) intimately mixing the particulate inorganic hydrophilic material with a solution of the polymeric binder in an appropriate solvent to form a slurry; ii) uniformly spreading said slurry on an inert flat surface to form a wet sheet while keeping the fabric stretched and separated from the support; iii) immersing the stretched organic fabric into the wet sheet; iv) allowing the solvent to evaporate and optionally further eluting the solvent, and v) removing the dry sheet from the flat surface.