REDUCED CONTAMINATION DURING HYDROFORMYLATION PROCESSES BY ADDING WATER Russian patent published in 2016 - IPC C07C45/80 C07C47/02 C07C45/50 

FIELD: chemistry.

SUBSTANCE: present invention relates to a method of extracting for removal of metal salts from organic hydroformylation reaction fluid medium ("HRF") before the HRF return to the hydroformylation process reaction zone, herewith the HRF includes organophosphorus ligand and metal-complex organophosphorus ligand. Extraction method involves the step of the HRF contact with an aqueous buffer solution in the area of hydroformylation process buffer extraction, and the reaction zone is located upstream the buffer extraction zone. Herewith this method also includes the stage of the HRF contact with water ("added water") added in addition to the water present in the aqueous buffer solution performed (A) in the zone for extraction of salt, downstream the zone for extraction of buffer, and (B) before the HRF return to the reaction zone.

EFFECT: proposed method allows to stabilize the organophosphorus ligand against hydrolytic dehydration, and the complex of metal-organophosphorus ligand - against degradation and deactivation.

9 cl, 3 dwg, 3 tbl, 9 ex