Cobalt-catalyzed process for preparing 1,3-propanidiol
US5777182A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 1996 |
| Grant date | Jul 7, 1998 |
| Priority date | — |
| Expiry date | Aug 26, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C45/80
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
1,3-propanediol is prepared in a process which involves hydroformylating ethylene oxide: PA1 (a) in an essentially non-water-miscible solvent in the presence of a non-ligated cobalt catalyst and a catalyst promoter at a temperature within the range of about 50.degree. to about 100.degree. C. and a pressure within the range of about 500 to about 5000 psig, to produce an intermediate product mixture comprising less than about 15 wt % 3-hydroxypropanal; PA1 (b) adding an aqueous liquid and extracting at a temperature less than about 100.degree. C. the 3-hydroxypropanal to provide an aqueous phase comprising 3-hydroxypropanal in greater concentration than the concentration of 3-hydroxypropanal in said intermediate product mixture, and an organic phase comprising the cobalt catalyst; PA1 (c) separating the aqueous phase from the organic phase; PA1 (d) hydrogenating the 3-hydroxypropanal to provide a hydrogenation product mixture comprising 1,3-propanediol; and PA1 (e) recovering 1,3-propanediol from said hydrogenation product mixture. The process enables the production of 1,3-propanediol in high yields and selectivity without the use of a phosphine ligand-modified cobalt catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.