Chelate ligands for low pressure hydroformylation catalyst and process employing same

Abstract From the Canadian patent

Abstract of the Disclosure Hydroformylation reactions wherein at least one olefin having from 2 to 20 carbon atoms is contacted in a reaction zone at e temperature of from about 20°C to about 250°C and a pressure of from about 15 psig to about 800 psig with hydrogen, carbon monoxide, and a catalyst containing rhodium at least, one ligand having the formula wherein:, each Ar is independently selected from aromatic ring compounds having 6 up to 14 carbon atoms e.g. phenyl, naphthyl, phenanthryl and anthracenyl; the x bonds and the y bonds are attached to adjacent carbon atoms on the ring structures; each R, when present as a substituent, 18 independently selected from alkyl, alkoxy aryloxy, …