Minimising rhodium loss during continuous olefin hydroformylation - catalysed by solubilised rhodium phosphite complex, loss occurring during distn. to recover aldehyde being minimised by adding polar polymer

摘要

Method is claimed for minimizing or preventing pptn. of Rh from a Rh-phosphite complex occurring during a liq. recycle hydroformylation process for prodn. of aldehyde from an olefinic cpd., CO and H2, catalyzed by a solubilized Rh-phosphite complex, with recovery of the aldehyde prod. by distn. The method comprises distilling the aldehyde prod. from a reaction prod. soln. contg. the aldehyde, the solubilized complex and in addn. an organic polymer contg. amide, ketone, carbamate, urea or carbonate as polar functional groups.