Method for the preparation of pure carboxyethyl germanium sesquioxide
US5550266A · kind A · utility
2Cited by
6References
14Claims
0Family size
Inventor
Key dates
| Filing date | Jan 31, 1995 |
| Grant date | Aug 27, 1996 |
| Priority date | — |
| Expiry date | Jan 31, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F7/30
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A synthetic method for generating pure carboxyethyl germanium sesquioxide in the absence of toxic impurities. In the method germanium dioxide and metallic germanium are not used as starting materials. The method involves steps which ensure (a) full reaction of germanium tetrachloride to ensure none is available to form germanium dioxide, (b) removal of any germanium dioxide, (c) removal of any germanium tetrachloride later produced from any germanium dioxide and (d) final removal of any germanium dioxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.