Catalytic reforming of alkyleneamines to linearly-extended polyalkylenepolyamines
US5118850A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 1990 |
| Grant date | Jun 2, 1992 |
| Priority date | — |
| Expiry date | Nov 9, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C209/64
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for reforming alkyleneamines to predominantly linearly-extended polyalkylenepolyamines comprising contacting an alkyleneamine or mixture thereof with a catalyst under conditions such that a mixture of polyalkylenepolyamines enriched in linearly-extended products is formed, said catalyst containing at least one compound selected from the group consisting of (a) Group VB metal oxides, (b) Group VB metal phosphates, (c) silicates of Groups IIA, IIIB, IVB, VB, and the lanthanide and actinide metals, and (d) tungsten oxdies, with the proviso that the silicates and tungsten oxides are essentially free of aluminum. For example, ethylenediamine is contacted with a catalyst of niobium phosphate or niobic acid under reaction conditions to yield predominantly non-cyclic polyethylenepolyamines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.