FIELD: organic chemistry and chemical technology. SUBSTANCE: method involves feeding flow of C4--hydrocarbons in apparatus for separation of butene-1 and recovery of products remained after treatment in bond isomerization section to the same apparatus to convert butene-2 to butene-1. Separative apparatus containing molecular sieve is switched on in order to blow paraffins to cyclic process of hydrocarbons treatment in vapor phase. Method ensures to blow paraffins flow practically no containing olefins and utilize olefins almost completely and increase butene-1 production maximally. This decreases paraffins concentration in cycle. EFFECT: improved method of synthesis, increased yield, decreased cost and energy consumption. 16 cl, 2 tbl, 5 dwg
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