Process for recovering ethyleneamines
US4582937A · kind A · utility
7Cited by
1References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1985 |
| Grant date | Apr 15, 1986 |
| Priority date | — |
| Expiry date | Apr 12, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C209/86
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Ethyleneamines are efficiently recovered from an aqueous solution thereof by extracting them from the aqueous solution into an organic phase with an extractant selected from carbonyl group-containing organic solvents, benzyl alcohol, carboxylic acids and salts thereof, alkylphosphoric acids and salts thereof, and mixed solvents containing at least one of these extractants. The ethyleneamines in the organic phase is recovered preferably from the organic phase to the aqueous phase by incorporating an acid therein, followed by phase separation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.