Production of red phosphorus
US4526766A · kind A · utility
2Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 13, 1983 |
| Grant date | Jul 2, 1985 |
| Priority date | — |
| Expiry date | Dec 13, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B25/023
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Red amorphous phosphorus is formed by thermal conversion of yellow phosphorus by a process wherein thermal conversion is effected while simultaneously the heat of conversion is permitted to effect evaporation of yellow phosphorus. The evaporated yellow phosphorus is condensed, collected and used in a subsequent conversion batch. The red amorphous phosphorus is obtained substantially free from residual unconverted yellow phosphorus and in a physical form which allows ready further processing to particulate form.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.