Process for production of aromatic aldehydes

Details Process for production of aromatic aldehydes Process for production of aromatic aldehydes

1988-12-20

1990-12-18

Lone, Werren B.

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

Organic compounds

Oxygen containing

568431, 568437, C07C 4529, C07C 4538

Patent

active

049788027

ABSTRACT:
Aromatic aldehydes are produced by oxidation with oxygen of a para-cresol derivative in a solvent, in the presence of a base and a catalytic amount of a cobalt compound. The catalyst is a chelated complex of cobalt with a rigid structure that is slightly oxidizable selected from the group consisting of bis-(4-methylpyridine isoindolinato)cobalt(II) acetate, phthalocyaninatocobalt(II), and sulfophthalocyaninanatocobalt(II). The process is particularly suited to the production of p-hydroxy benzaldehydes.

REFERENCES:
patent: 3666815 (1972-05-01), Scheltus
patent: 4429163 (1984-01-01), Nishizawa et al.
patent: 4471140 (1984-09-01), Au
Kathari et al., J. of Catalysis 41, 180-189 (1976).

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