METHOD FOR CONTINUOUS HYDROFORMYLATION OF C-C OLEFINS INTO ALDEHYDES Russian patent published in 2015 - IPC C07C47/02 C07C45/50 G05D11/00 

FIELD: chemistry.

SUBSTANCE: invention relates to a method for continuous hydroformylation of C₃-C₂₁ olefins into aldehydes in the presence of a catalyst system consisting of separate components - a soluble rhodium compound, a diphosphite ligand and an additional promoting organophosphorus ligand, selected from monophosphine, diphosphine or monophosphite. The method includes, while performing hydroformylation, controlling the value and rate of change of regioselectivity of the process on straight-chain aldehydes, periodically adding to the reaction mixture a disphosphite ligand in amount of 0.1-1 mol per 1 mol of the loaded rhodium and a promoting ligand in amount of 0.1-10 mol per 1 mol of the loaded rhodium, wherein the disphosphite ligand is added when regioselectivity decreases to a value not lower than 80%, and the promoting ligand is added when the rate of decrease of regioselectivity increases by more than 20% relative to the rate of the first decrease of regioselectivity after starting the hydroformylation process.

EFFECT: method reduces consumption of the diphosphite ligand with high regioselectivity of the catalyst system on straight-chain aldehydes.

1 dwg, 1 tbl, 6 ex