Catalytic reforming of cyclic alkyleneamines
US5256786A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 1992 |
| Grant date | Oct 26, 1993 |
| Priority date | — |
| Expiry date | Mar 2, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D295/13
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process of reforming cyclic alkyleneamines to amine-extended cyclic alkyleneamines involving contacting a cyclic alkyleneamine or mixture of cyclic alkyleneamines in the liquid phase with a catalyst under reaction conditions. The catalyst is selected from the group consisting of (a) Group VB metal oxides, (b) Group VB metal phosphates, (c) silicates of Groups IIA, IIIB, IVB and VB, and (d) specified tungsten oxides. For example, piperazine or a mixture of piperazine and aminoethylpiperazine is contacted with magnesium silicate to yield a mixture of amine-extended piperazines, including 1,2-bis(piperazinyl)-ethane and N,N'-bis(2-piperazinylethyl)piperazine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.