Hydroformylation of olefinically unsaturated compounds

摘要

A process for hydroformylating olefinically unsaturated compounds by means of rhodium/triphenylphosphine/carbonyl complexes formed in situ from rhodium acetate, triphenylphosphine and carbon monoxide, wherein the hydroformylation reaction is preceded by a starting phase in which the mixture of the hydroformylation medium, the triphenylphosphine and rhodium acetate is heated at from 90 DEG to 120 DEG C. under a CO/H2 pressure of from 5 to 20 bar and the acetic acid liberated is discharged from the reactor in gaseous form in a stream of CO and H2, until virtually no more acetic acid can be detected in this gaseous discharge.