Hydrogenation of methylenedianiline to produce bis(para-aminocyclohexyl)methane
US4754070A · kind A · utility
17Cited by
18References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 23, 1986 |
| Grant date | Jun 28, 1988 |
| Priority date | — |
| Expiry date | Jan 23, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2601/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
This invention relates to an improved hydrogenation process wherein methylenedianiline is reduced to form bis(para-aminocyclohexyl)methane (PACM). The process contemplates contacting methylenedianiline and hydrogen in the presence of a two component metal catalyst comprising rhodium and ruthenium under mild hydrogenation conditions. Use of the mixed metal catalyst system allows one to obtain a preselected isomer ratio having from about 5-40% by weight, typically 14-28% by weight of the trans,trans- configurational isomer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.