Low pressure hydroformylation of dienes
US4742178A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 1986 |
| Grant date | May 3, 1988 |
| Priority date | — |
| Expiry date | Nov 10, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F15/008
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A hydroformylation process for preparing dialdehydes from dienes by contacting a C.sub.6 -C.sub.10 diene in a reaction zone at a temperature of from about 20.degree. C. to about 250.degree. C. and a pressure of from about 15 psig to about 800 psig with hydrogen, carbon monoxide, and a catalyst containing rhodium, the ligand having the formula ##STR1## wherein: n is 1-4; PA0 each R is independently selected from hydrogen, alkyl, alkoxy, aryloxy, aryl, aralkyl, alkaryl, alkoxyalkyl, cycloaliphatic, halogen, alkanoyl, alkanoyloxy, alkoxycarbonyl, carboxyl or cyano; PA0 each R.sub.1 and R.sub.2 is independently selected from alkyl, aryl, aralkyl, alkaryl or cycloaliphatic; PA0 each R.sub.3 and R.sub.4 is independently selected from hydrogen and the R.sub.1 substituents; and PA0 each Y is independently selected from the elements N, P, As, Sb and Bi.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.