Process for preparing mono-long chain amine oxide surfactants with low nitrite, nitrosamine and low residual peroxide
US6294514A · kind A · utility
39Cited by
13References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 24, 1998 |
| Grant date | Sep 25, 2001 |
| Priority date | — |
| Expiry date | Nov 24, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C291/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Mono-long chain amine oxide surfactants can be prepared containing active levels of greater than about 30%, by weight of amine, and with low nitrite and nitrosamine levels and low levels of residual hydrogen peroxide when oxidized under controlled temperature conditions in the presence of bicarbonate material present at levels less than about 2.5%, by weight of amine, and without the presence of phase-modifying solvents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.