Hydroformylation process

Details Hydroformylation process Hydroformylation process

1987-11-25

1989-02-28

Lone, Werren B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568451, C07C 4550

Patent

active

048087580

ABSTRACT:
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.degree. to 150.degree. 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.

REFERENCES:
patent: 4547595 (1985-10-01), Chang

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