Continuous carbothermal reactor
US5112579A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 1990 |
| Grant date | May 12, 1992 |
| Priority date | — |
| Expiry date | Dec 12, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B21/0726
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A reactor for carbothermal reduction is disclosed. By supplying gaseous nitrogen throughout a discrete aliquot of a preferably pelletized mixture of aluminum oxide, carbon and, optionally, calcium oxide during the carbothermal reduction thereof to aluminum nitride and continuously removing gaseous reaction products therefrom, a high quality aluminum nitride is produced. One means of supplying gaseous nitrogen to the mixture of solid reactants is a perforated tray having a hollowed-out bottom. Gaseous nitrogen supplied to the hollowed-out portion flows through the perforations and throughout solid reactants contained in the tray. The carbon may be alternatively supplied, in whole or in part, as a gaseous reactant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.