FIELD: chemistry.
SUBSTANCE: claimed method of obtaining alkylaromatic monocarboxylic acids involves liquid phase oxidation of dialkyl-substituted aromatic hydrocarbons by oxygen-containing gas in the presence of catalyst at high temperature. Alkyltrimethylammonium bromide with alkyl C14-C16 or their mix at 0.3-0.5 wt % of hydrocarbon weight is used as catalyst. Process is performed at 90-120°C until mass ratio of alkylaromatic acid to alkylaromatic aldehyde in the mix reaches 1:1.3-3.0, then alkylaromatic acid is separated, and unreacted hydrocarbon and aldehyde are returned to the process.
EFFECT: possibility to perform mild partial oxidation of dialkyl-substituted aromatic hydrocarbons selectively by one alkyl group without adding transition metals.
2 cl, 8 ex
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