Synthesis of aldehydes from alcohols

Details Synthesis of aldehydes from alcohols Synthesis of aldehydes from alcohols

1985-01-28

1986-06-10

Lone, Werren B.

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

Organic compounds

Oxygen containing

568496, 568902, C07C 4549

Patent

active

045944636

ABSTRACT:
A catalyst has been found for the low pressure hydroformylation of alcohols to produce aldehydes. This catalyst consists of a rhodium containing compound, an iodide containing compound, and a chelating Group V compound, which is used alone or in combination with a monodentate, Group V compound.
It is the first rhodium-based catalyst that generates acetaldehyde via hydroformylation of the methanol. The reaction is typically carried out at 160.degree.-180.degree. C. and 1000-2000 psi. The acetaldehyde rate and selectivity are 1-5 Mhr.sup.-1 and 50-75%. Conventional cobalt catalysts require operating pressures of at least 3000-6000 psi in order to obtain reasonable productivities.

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Flakley et al., "Applied Catalysis", vol. 5 (1983), p. 5.

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