An efficient method of obtaining the C₁₁–C₁₄ cycloolefinic hydrocarbons of framing structure by codimerization of C₅–C₆-cyclodienes, of their methyl- and vinyl derivates under conditions of monomerization of dicyclopentadiene (DCPD) with participation of the H-forms of zeolite catalysts and the hydrogenation of the dienes synthesized in a flow system under atmospheric pressure has been developed. The use of zeolites as catalysts accelerates monomerization of dimer, reduces the rate of oligomerization of the forming cyclopentadiene and improves the reaction selectivity by its codimers with C₆–C₉ unsaturated cyclic hydrocarbons.