Process for the production of methylene-bridged polyphenyl polyamines
US8871979B2 · kind B2 · utility
3Cited by
7References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 26, 2009 |
| Grant date | Oct 28, 2014 |
| Priority date | — |
| Expiry date | Nov 26, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C209/78
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for providing methylene-bridged polyphenyl polyamines from aniline and formaldehyde according to the invention comprises the subsequent steps of a) condensing aniline and formaldehyde; b) reacting, in a first catalytic reaction step, said condensate over a solid catalyst, whereby an intermediate mixture is provided; c) converting, in a subsequent catalytic reaction step, said intermediate mixture into methylene-bridged polyphenyl polyamines in presence of a subsequent solid catalyst, thereby providing said methylene-bridged polyphenyl polyamines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.