FIELD: petrochemical processes. SUBSTANCE: skeleton isomerization of nbutylenes is carried out by bringing into contact mixture of diluent with nbutylenes at molar ratio (0.5-10):1 with catalyst at 350-500 C and pressure 1-5 atm, said catalyst being aluminum oxide prepared by hydrolysis of aluminum alcoholate having general formula Al(OR)3, in which R denotes alkyl with at least 2 carbon atoms. EFFECT: increased stability and activity of catalyst. 2 cl, 1 tbl, 5 ex
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