Oximation process
AssigneeHenkel Corporation
InventorLeroy O. Krbechek
Life of this patent
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Abstract
An improved process for oximation of carbonyl compounds, such as ketones and aldehydes by oximation with hydroxylamine including oximation processes carried out in the presence of a catalytic amount of an alkyl phenol phase transfer catalyst, such as nonylphenol or dodecylphenol and the presence of an alkali metal or alkaline earth metal compound. The resulting oximes are useful as metal extractants.
Claims21
In a method of preparing aromatic oximes by reaction of an aromatic ketone or aldehyde carbonyl compound with hydroxylamine the improvement which comprises conducting the reaction in the presence of a catalytic amount of an alkyl phenol, and an alkali metal or alkaline earth metal hydroxide, carbonate or bicarbonate, the alkyl phenol being present in an amount effective to act as a phase transfer catalyst.
A method of preparing a hydroxy oxime having the formula ##STR3## in which R and R.sub.a may be individually alike or different and are saturated aliphatic hydrocarbon different and are saturated aliphatic hydrocarbon groups of 1-25 carbon atoms or ethylenically unsaturated groups of 3-25 carbon atoms and Y is H or R.sub.b where R.sub.b is an aliphatic hydrocarbon group containing from 1 to about 10 carbon atoms;
- ##STR4## in which R.sub.a and Y are as defined with respect to Formula I, comprising
- (a) reacting a carbonyl compound corresponding to the hydroxy oxime defined above with hydroxylamine in the presence of
- (1) a catalytic amount of an alkyl phenol phase transfer catalyst and
- (2) an alkali metal or alkaline earth metal hydroxide, carbonate or bicarbonate whereby the carbonyl group of the carbonyl compound is converted to the oxime group;
- and
- (b) recovering the resulting oxime from the reaction mixture.
Dependencies are inferred from the claim text.