Preparation and purification of hydroxylamine stabilizers
US6867327B2 · kind B2 · utility
0Cited by
3References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2002 |
| Grant date | Mar 15, 2005 |
| Priority date | — |
| Expiry date | Apr 11, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2601/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to the preparation of ultra-high purity 1,2-diaminocyclohexanetetraacetic acid being essentially free of unwanted metal and metal ion contaminants and its use as a stabilizer for ultra-high purity hydroxylamine compounds used extensively in the production of high premium electronic components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.