Process for preparing linearly-extended polyalkylenepolyamines
US5030740A · kind A · utility
29Cited by
18References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 14, 1988 |
| Grant date | Jul 9, 1991 |
| Priority date | — |
| Expiry date | Oct 14, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/0273
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for preparing linearly-extended polyalkylenepolyamines, such as linear and branched polyethylenepolyamines, comprising contacting a difunctional aliphatic alcohol, such as monoethanolamine, with a reactant amine, such as ethylenediamine, in the presence of a catalyst containing tungsten oxide essentially free of the metals of Groups VIII, IB, and IIB of the Periodic Table. Included among the linearly-extended polyalkylenepolyamines are alcohol-extended piperazines, such as N-(2-hydroxyethyl)-piperazine, and amine-extended piperazines, such as N-(2-aminoethyl)piperazine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.