Hydroformylation process utilizing an unmodified rhodium catalys

Details Hydroformylation process utilizing an unmodified rhodium catalys Hydroformylation process utilizing an unmodified rhodium catalys

1981-04-10

1983-08-23

Lone, Werren B.

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

Organic compounds

Oxygen containing

568452, 568451, C07C 4550

Patent

active

044005474

ABSTRACT:
This invention concerns an oxo process, either batch or continuously operated, for the preparation of aldehydes, principally in relatively high proportions of branched isomer, from olefins and synthesis gas employing an unmodified rhodium catalyst feed or recycle such as the rhodium salts of organic carboxylic acids. More particularly the invention concerns such a process wherein at least a portion of the reaction medium, e.g., the oxo reactor effluent, is contacted with a ligandizing compound such as triphenylphosphine, prior to product recovery by distillation, such that the rhodium catalyst is converted to a stable form and not lost by plating out on the distillation column or base heater during the distillation. Thereafter, the catalyst is deligandized and regenerated by air treatment and reused in the process.

REFERENCES:
patent: 2880241 (1959-03-01), Hughes
patent: 3527809 (1970-09-01), Pruett et al.
patent: 3871970 (1975-03-01), Nienburg et al.
patent: 3899442 (1975-08-01), Friedrich
patent: 3917661 (1975-11-01), Pruett et al.
patent: 4135911 (1979-01-01), Balmat
patent: 4148830 (1979-04-01), Pruett et al.
patent: 4196096 (1980-04-01), Dawes

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