Back to results
US 4,394,228 AGranted
Raney alloy coated cathode for chlor-alkali cells
AssigneeOlin Corporation
InventorThomas J. Gray
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeOlin Corporation
InventorThomas J. Gray
Estimating the term…
An improved cathode with a conductive metal core and a Raney-type catalytic surface predominantly derived from an adherent Beta Nickel (NiAl.sub.3) crystalline precursory outer portion of the metal core is disclosed. The precursory outer portion preferably has molybdenum added to give a precursor alloy having the formula Ni.sub.x Mo.sub.1-x Al.sub.3 where x is within the range of from about 5 to about 15 weight percent. Also disclosed is a method of producing a low overvoltage cathode. The method includes the steps of taking a Ni-Mo core or substrate having about 5-20 weight percentage of Mo and coating it with aluminum then heat treating to form a Ni-Mo-Al alloy with mostly Beta Nickel (NiAl.sub.3) structure and then leaching out the Al to produce a Raney surface.
In a process of producing alkali metal hydroxide comprising electrolyzing an aqueous alkali metal chloride brine in an electrolytic cell having an anode, a cathode comprising a substrate with a catalytic surface thereon, said anode being separated from cathode by a synthetic fluorocarbon resin permionic membrane, the improvement wherein
In an electrolytic cell having an anode, a cathode comprising a substrate with a catalytic surface thereon, and a synthetic fluorocarbon resin permionic membrane therebetween, the improvement wherein:
Dependencies are inferred from the claim text.