Reduction of nitrosamine formation
US5023376A · kind A · utility
15Cited by
8References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1989 |
| Grant date | Jun 11, 1991 |
| Priority date | — |
| Expiry date | Jul 17, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C291/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Reaction of amine-containing substrates with hydrogen peroxide can suffer from the problems of in situ generation of nitrosamines, which are allegedly carcinogens, as impurities and impaired product formation, especially in the presence of transition metals. The problems can be ameliorated by employing a selected range of alkyleneaminopoly(methylenephosphonic acid) compounds such as cyclohexane-1,2-diaminotetra(methylenephosphonic acid).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.