Method of manufacturing electrolysis cell diaphragms
AssigneeRhone-Progil
InventorsJean Bachot, Pierre Bouy, Michel Juillard
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Abstract
A uniform, porous, homogeneous diaphragm for use in electrolysis cells is provided by bringing together a homogeneous, stable suspension of asbestos fibers in water and a fluorinated polymeric resin latex with a pore-forming agent in the presence of a sulfonated anionic surfactant, the resulting suspension being shaped to the desired form of the diaphragm by filtration, the desired shape of the diaphragm then being dried and sintered at a temperature above the crystalline melting point of the fluorinated polymeric resin, the pore-forming agent finally being removed from the resulting diaphragm by decomposition or extraction.
Claims12
A method of manufacturing uniform, porous, homogeneous diaphragms of deposited asbestos, having uniform pore sizes, which are consolidated by a fluorinated polymer resin, characterized by agitating a suspension of asbestos fibers in water, a sulfonic anionic surfactant, a fluorinated polymer resin latex and a solid mineral pore-former to form a stable, homogeneous suspension, depositing and filtering said suspension on a screen or grid to form a preform, drying the resulting preform, sintering it by heat alone at a temperature above the crystalline melting point of the fluorinated polymer resin, and finally removing said solid mineral pore-former to form a uniform, porous, homogeneous diaphragm.
Dependencies are inferred from the claim text.