Formation of colloidal dispersions of selenium by the locus control method
US4122030A · kind A · utility
26Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1977 |
| Grant date | Oct 24, 1978 |
| Priority date | — |
| Expiry date | Sep 19, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2004/64
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention is a method for preparing a colloidal dispersion of selenium by the locus control process. In one embodiment the method involves adding hydrazine to a solution containing submicron sized domains of a soluble second phase which domains bear a plurality of pendant acid groups to form a salt between the hydrazine and pendant acid groups. Addition of selenous acid to the solution results in reduction of the selenium contained therein to zero valent selenium which selenium is produced in the form of a stable colloidal dispersion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.