Diaphragm for an electrolysis cell
AssigneeSolvay & Cie
InventorsJean De Ceuster, Bruno Grassi
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Abstract
Diaphragms for a cell, in which the electrolysis of an aqueous solution of an alkali metal is carried out, having good permeability, shape and dimensional stability and good wettability characteristics with respect to the electrolyte are disclosed as well as a method for the manufacture thereof. The diaphragms are composed of a mixed sheet of a substantially homogeneous mixture of amphibole asbestos fibers and polyvinylidene fluoride fibrils connected together. To manufacture the diaphragms, an intimate mixture of polyvinylidene fluoride fibrils and amphibole asbestos is formed into a sheet and the sheet is heated to cause surface fusion of the fibrils.
Claims12
A diaphragm for a cell for the electrolysis of an aqueous solution of an alkali metal halide comprising a mixed sheet formed of a substantially homogeneous mixture of fibers of amphibole asbestos and fibrils of polyvinylidene fluoride connected together, said fibrils having a three-dimensional network structure, a length of about 0.5 to 50 mm., a thickness of about 0.01 to 5 and a specific surface area greater than 1 m..sup.2 /g. and forming ribbons having a thickness of less than 4 u.
Dependencies are inferred from the claim text.