Process for the preparation of a bis-salicylidene-alkylene-diami

Details Process for the preparation of a bis-salicylidene-alkylene-diami Process for the preparation of a bis-salicylidene-alkylene-diami

1984-01-18

1985-12-31

Sneed, Helen M. S.

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

Organic compounds

Heavy metal containing

C07F 1506

Patent

active

045622779

ABSTRACT:
Improved process for the preparation of salcomine useful as an oxidation catalyst for the oxidation of alkylated phenols to the corresponding alkylated p-benzoquinones by reacting salicylaldehyde with ethylenediamine in a mole ratio of about 2:1 and a cobalt salt in a liquid reaction medium wherein the reaction medium is a linear or cyclic carboxamide which is disubstituted on the nitrogen, in particular dimethylformamide, and the cobalt salt is cobalt carbonate or with the cobalt hyroxide carbonate, 2 CoCO.sub.3.3 Co(OH).sub.2.H.sub.2 O. Preparation of the salcomine in accordance with the invention offers significant advantages, both in the preparation of the salcomine itself and in the subsequent oxidation of the trimethylphenol to trimethyl-p-benzoquinone utilizing the salcomine.

REFERENCES:
patent: 2450276 (1948-09-01), Fogler et al.
patent: 3441578 (1969-04-01), Dimroth
patent: 3632618 (1972-01-01), Pancheco et al.
patent: 3687991 (1972-08-01), Gaeng
Calderazzo, J. Chem. Soc. (A) p. 1378 (19690.

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