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Carbonaceous cathode with enhanced wettability for aluminum production

United States Patent

September 9, 2003
View the Complete Patent at the US Patent & Trademark Office
A method of preparing carbonaceous blocks or bodies for use in a cathode in an electrolytic cell for producing aluminum wherein the cell contains an electrolyte and has molten aluminum contacting the cathode, the cathode having improved wettability with molten aluminum. The method comprises the steps of providing a carbonaceous block and a boron oxide containing melt. The carbonaceous block is immersed in the melt and pressure is applied to the melt to impregnate the melt into pores in the block. Thereafter, the carbonaceous block is withdrawn from the melt, the block having boron oxide containing melt intruded into pores therein, the boron oxide capable of reacting with a source of titanium or zirconium or like metal to form titanium or zirconium diboride during heatup or operation of said cell.
Keller; Rudolf (Export, PA), Gatty; David G. (Leechburg, PA), Barca; Brian J. (Munhall, PA)
EMEC Consultants (
09/ 834,190
April 13, 2001
This invention was made with Government support under Contract No. DE-FG07-98ID13664 awarded by the Department of Energy. The Government has certain rights in this invention