JPS56142881A - Preparation of cathode for preparing alkali hydroxide - Google Patents

Abstract

PURPOSE: To prepare the titled cathode having sufficient capacity for lowering electrolytic voltage and being capable of holding said capacity for a long period by making silver obtained by subjecting silver carbonate or silver oxide to thermal cracking and hydrophobic substance to be contained into a porous substrate.

CONSTITUTION: Water is added to silver carbonate, silver oxide or both of them and a hydrophobic substance such as a carbon powder, a fluorine containing high molecular compound or a paraffin and, according to necessity, a pore forming agent and the resulting mixture is kneaded into a paste like form. The resulting kneaded mixture is rolled by using a roll to form a sheet like material. The obtained one sheet like material or plural stacked layers thereof is adhered to a current collector such as a net like material under pressure by a means such as a press or the like. Subsequently, the resulting laminate is baked in an inert gas atmosphere to convert the metal salt to a metal silver by pyrolysis and, thereby, the cathode for preparing an alkali metal hydroxide containing silver distributed in the porous carbon substrate thereof as a catalyst is prepared.

COPYRIGHT: (C)1981,JPO&Japio