Production of compounds by reaction of solid materials at high temperatures produced by plasma arc torches
US4766284A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 5, 1986 |
| Grant date | Aug 23, 1988 |
| Priority date | — |
| Expiry date | Mar 5, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2002/82
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Reactions between solid materials to form useful products, for example, strontium ferrites, are effected by heating a primary solid feed material with a plasma gas stream to melt the primary feed material and then contacting a secondary solid feed material with the molten primary feed material and the plasma gas stream to melt the secondary feed material and enable reaction among the reactants to occur. The method of the invention simplifies the effecting of solid-solid reactions using plasma gas streams and permits the use of impure materials as the secondary feed material, strontium carbonate or strontium oxide and ferric oxide (hematite), so as to form a strontium ferrite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.