Ruthenium-cobalt carbonyl catalysts for the dealkoxyhydroxymethylation of acetals to form glycol ethers
US4663489A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 5, 1986 |
| Grant date | May 5, 1987 |
| Priority date | — |
| Expiry date | May 5, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2531/845
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The cobalt carbonyl catalyst R.sup.5 CCo.sub.3 (CO).sub.9, desirably with Ru.sub.3 (CO).sub.12, wherein R.sup.5 is hydrogen; alkyl, preferably C.sub.1-5 lower alkyl; cycloalkyl or substituted cycloalkyl; cycloalkenyl, such as cyclohexenyl or cyclooctenyl; C.sub.1-12 alkoxy, such as methoxy or propoxy; aryl or alkyl-, cycloalkyl-, alkoxy-, halo-, or cyano-substituted aryl; cyano; or a silyl carbyne moiety of the formula R.sub.3.sup.6 Si, wherein R.sup.6 is alkyl or aryl, effectively catalyzes the dealkoxyhydroxymethylation of aldehyde acetals to form glycol monoethers. Methylal, for example, may be reacted with syngas; i.e., CO and H.sub.2, in the presence of this catalyst system to form the corresponding ethylene glycol monomethyl ether. The novel catalyst combination of R.sup.5 CCo.sub.3 (CO).sub.9 and Ru.sub.3 (CO).sub.12 is likewise claimed herein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.