Electrodes useful for molten salt electrolysis of aluminum oxide to aluminum
US7141149B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 22, 2004 |
| Grant date | Nov 28, 2006 |
| Priority date | — |
| Expiry date | Jun 7, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25C3/125
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention provides a method of making a carbon electrode, suitable for use as an anode in an aluminum reduction cell, which comprises mixing an aggregate, comprising a mixture of particulate shot coke, and a particulate carbonaceous material other than shot coke with coal tar pitch or petroleum pitch or a combination of these pitches at an elevated temperature to form a paste wherein said aggregate comprises a combination of coarse, medium, and fine particles and said particulate shot coke may comprise a majority of said fine particles, and said paste comprises from about 80 to about 90%, by weight, of said aggregate and from about 10 to about 20%, by weight, of said pitch; forming said paste into a solid body; and baking said solid body at an elevated temperature to form said carbon electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.