Process for preparing 1,3-propanediol
US5463145A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1994 |
| Grant date | Oct 31, 1995 |
| Priority date | — |
| Expiry date | Sep 30, 2014 |
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 comprising the steps of: PA0 contacting, in an essentially non-water-miscible organic solvent, ethylene oxide with carbon monoxide and hydrogen in the presence of a catalytic amount of a non-phosphine-ligated cobalt compound and an effective amount of a lipophilic quaternary phosphonium salt 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 15 wt % 3-hydroxypropanal; PA0 adding an aqueous liquid to said intermediate product mixture and extracting into said aqueous liquid a major portion of the 3-hydroxypropanal at a temperature less than about 100.degree. C. to provide an aqueous phase comprising 3-hydroxypropanal in greater concentration than the concentration of 3-hydroxypropanal in the intermediate product mixture, and an organic phase comprising at least a portion of the cobalt compound and at least a portion of the lipophilic quaternary phosphonium salt; PA0 contacting the aqueous phase comprising 3-hydroxypropanal with hydrogen in the presence of a hydrogenation catalyst a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.