Process for the preparation of calcium superoxide
US4101644A · kind A · utility
Inventors
Key dates
| Filing date | Jul 11, 1977 |
| Grant date | Jul 18, 1978 |
| Priority date | — |
| Expiry date | Jul 11, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B15/043
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Calcium superoxide is prepared in high yields by spreading a quantity of calcium peroxide diperoxyhydrate on the surface of a container over an area of 18 to 300 cm.sup.2 per gram of diperoxyhydrate; positioning said container in a vacuum chamber on a support structure through which a coolant fluid can be circulated; partially evacuating said vacuum chamber, allowing the temperature of the diperoxyhydrate to reach to a level within the range of about 0.degree. to about 40.degree. C, with the assistance of an external source of heat or liquid coolant, as needed; maintaining the temperature selected for a period of time sufficient to complete the disproproriation of the diperoxyhydrate to calcium superoxide, calcium hydroxide, oxygen and water; while maintaining the partial vacuum, constantly and systematically removing the water as it is formed by sweeping the reacting material with a current of dry inert gas and/or by condensation of said water on a cold surface; backfilling the chamber with a dry inert gas; and finally recovering the calcium superoxide produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.