Process for preparing diaphragm-deposited activated cathodes

Abstract From the Canadian patent

A novel process for preparing a diaphragmdeposited activated cathode for use in a chlor-alkali cell is disclosed; the process involves placing an activated cathode in a slurry of fibrous material and depositing a uniform mixture of the fibrous material onto the cathode by means of a vacuum; most importantly, the invention involves heat-treating the activated cathode in an inert atmosphere such as a, nitrogen atmosphere or a reducing atmosphere such as, a hydrogen atmosphere, during the baking or sintering of the diaphragm; diaphragm-deposited activated cathodes prepared according to this invention exhibit better adhesion and stability than those which are prepared using conventional …