Back to results
US 4,544,472 AGranted
Electrode coating and coated electrodes
AssigneeNalco Chemical Company
InventorFrederick V. Reven
Life of this patent
Estimating the term…
Abstract
Coating for carbon electrodes used as anodes in the electrolysis of aluminum are disclosed. The coatings are aqueous and contain zinc chloride and powdered alumina.
Claims1
A coated carbon electrode used in the manufacture of aluminum, the coating consisting essentially of prior to drying in percentages by weight:
- a. 15-50% zinc chloride
- b. 5-25% powdered alumina
- c. 1-10% alkali metal hydroxide or carbonate
- d. 0.05-5% of a suspending agent consisting essentially of starch as synthetic water-soluble polymers and xanthan gums
- e. 0.05-5% surface active agent
- f. balance water.
3 more elements
Dependencies are inferred from the claim text.