The catalytic activity of the micellar form of cationic surfactants in the presence of copper salts under conditions of emulsion oxidation of cumene to cumene hydroperoxide (CHP) with oxygen (t = 75 degrees, p(O-2) = 0.1 MPa) was examined. The efficiency of micellar catalysis in the emulsion oxidation of cumene was found to depend on the nature of the ligand in the aniono complex of copper: Br- > Cl- > SO42- > CH3COO- and on the lipophilicity of the alkyltrimethylammonium cation: C-16 > C-14 > C-12. The selective CHP formation corresponds to the surfactant concentration ranging from CMC1 (critical micelle concentration) to CMC2 (micelle structure change).