Chelating ligands and catalysts and processes employing the same
US4824977A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 1988 |
| Grant date | Apr 25, 1989 |
| Priority date | — |
| Expiry date | Mar 11, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2531/822
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A hydroformylation process including contacting hydroformylation stock 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 and carbon monoxide wherein the catalyst comprises rhodium in chemical complex with one or more ligands of the formulae ##STR1## wherein: Z, when present, represents the atoms necessary to form with adjacent carbons on the benzene nucleus a fused divalent ring structure having up to about 20 ring carbons; PA0 each ring is either unsubstituted or one or more of the hydrogens thereof is replaced with a substituent R selected independently from 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 selected independently from alkyl, aryl, aralkyl, alkaryl or cycloaliphatic; PA0 each A is a carbon atom which is either unsubstituted or substituted with one or two independently selected R substituents; PA0 each of the above hydrocarbon groups or moieties of R, R.sub.1 or R.sub.2 may be substituted with 1-3 of the aforesaid R substituents; PA0 ea…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.