Process for preparing diaphragm-deposited activated cathodes

Details Process for preparing diaphragm-deposited activated cathodes Process for preparing diaphragm-deposited activated cathodes

C - Chemistry, Metallurgy

25

B

204/191

C25B 1/46 (2006.01) C25B 13/04 (2006.01)

Patent

CA 1282032

ABSTRACT A novel process for preparing a diaphragm- deposited 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 techniques; this, in turn, permits sustained operation in a chlor-alkali cell at a lower voltage for substantial energy savings.

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