Process of preparing linearly-extended polyalkylenepolyamines employing metal silicate catalysts
US5073635A · kind A · utility
19Cited by
28References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 22, 1990 |
| Grant date | Dec 17, 1991 |
| Priority date | — |
| Expiry date | Jun 22, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D295/13
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process of preparing linearly-extended polyalkylenepolyamines, such as linear and branched polyethylenepolyamines, comprising contacting a difunctional aliphatic alcohol, such as monoethanolamine, with a reactant aliphatic amine, such as ethylenediamine, in the presence of a metal silicate catalyst wherein the metal is selected from Groups IIIB, IVB, VB and the lanthanide rare earth metals. Reactions of piperazines with alkanolamines to yield alcohol-extended and/or amine-extended piperazines are included in the process of this invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.