Hydroformylation process

Details Hydroformylation process Hydroformylation process

C - Chemistry, Metallurgy

07

C

260/573.2

C07C 45/50 (2006.01) C07C 47/02 (2006.01)

Patent

CA 1263871

ABSTRACT OF THE DISCLOSURE In a hydroformylation process for the preparation of aldehydes by reacting aliphatic olefins of 2 to 12 carbon atoms with carbon monoxide and hydrogen at temperatures of 20 to 150°C and pressures of 0.1 to 20 mPa in the liquid phase and in the presence of an aqueous solution of a catalyst containing originally 50 to 800 wt. ppm of rhodium and 25 to 30 wt. % of complex-forming, sulfonated or carboxylated triarylphosphines, in each case based on the aqueous solution, the improvement comprising adding fresh phosphine solution to maintain the original phosphine concentration, until the total concentration of complex-forming phosphines and secondary and degradation products of the phosphines not capable of forming complexes amounts to about 35 to 45 wt. % based on the aqueous solution to selectively form n- aldehydes.

552969

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