Process for removing alkali metal carboxylates from mixtures con

Details Process for removing alkali metal carboxylates from mixtures con Process for removing alkali metal carboxylates from mixtures con

1980-06-11

1982-04-20

Chan, Nicky

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

Organic compounds

Oxygen containing

568836, 568835, 568832, C07C 2986, C07C 4580

Patent

active

043260853

ABSTRACT:
The invention relates to a method for removal of alkali metal carboxylates from mixtures which contain a cycloalkanone and a cycloalkanol, in particular cyclohexanone and cyclohexanol, and which have been obtained in oxidation in the liquid phase of the corresponding cycloalkane with gas containing molecular oxygen.
According to the invention, alkali metal carboxylates are removed from such mixtures containing a cycloalkanone and a cycloalkanol by washing the mixture with an aqueous acid solution, in particular an aqueous solution of carboxylic acid with 1-6 carbon atoms per molecule.
The invention provides a solution to the problem of the so-called alkali entrainment, which leads to loss of cycloalkanone owing to condensation into undesired high-boiling by-products in the following distillation for gaining pure cycloalkone. This substantial loss is prevented by the method according to the invention.

REFERENCES:
patent: 3179699 (1965-04-01), Waldmann
patent: 3340304 (1967-09-01), Schulz et al.
patent: 3391190 (1968-07-01), Kilsheimer et al.
patent: 3439041 (1969-04-01), Gey et al.
patent: 4163027 (1979-07-01), Magnussen et al.
patent: 4283560 (1981-08-01), Choo et al.
Magnusse et al., Chem. Abst., vol. 89, #214,989f (1978).

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