Preparation of sulphides and selenides
US6379585B1 · kind B1 · utility
29Cited by
4References
11Claims
0Family size
Inventors
Key dates
| Filing date | Dec 7, 1999 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | Dec 7, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/60
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Sulphides and selenides are prepared by dissolving sulphur or selenium in an aqueous or non-aqueous solution of hydrazine hydrate. The solution is combined with a solution of an appropriate cation to precipitate the corresponding sulphide or selenide. Solutions of two or more cations may be used to produce ternary compounds of sulphur and selenium, for example thio-gallates. Likewise both sulphur and selenium can be used together to produce sulpho-selenides. The method is particularly applicable to the production of doped phosphors by the inclusion of solutions containing the appropriate dopant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.