FIELD: petrochemical processes. SUBSTANCE: method consists in cationic oligomerization of olefinic raw stock, in particular mixture of cis- and trans-isomers of 2-, 3-, 4-, and/or 5-decenes ("internal" decenes), separation of exhausted catalyst from oligomerization products, and hydrogenation of fractions isolated from oligomerization mixture. EFFECT: increased selectivity of process and improved quality of product. 11 cl, 6 tbl, 78 ex
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