Process for purifying aqueous tertiary amine and alkanolamine solutions
US6353138B1 · kind B1 · utility
4Cited by
2References
11Claims
0Family size
Inventor
Key dates
| Filing date | Apr 18, 2000 |
| Grant date | Mar 5, 2002 |
| Priority date | — |
| Expiry date | Apr 18, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C213/10
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the removal of primary and secondary amine and alkanolamine impurities from aqueous tertiary amine and alkanolamine solutions without affecting the tertiary amine and/or alkanolamine by treating these solutions with a monoaldehyde or dialdehyde has been described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.