TY JOUR TI DEVELOPMENT OF A CATALYST PREPARATION UNIT FOR THE ETHYLENE DIMERIZATION PROCESS UNDER IMPORT SUBSTITUTION CONDITIONS KW ethylene KW butene-1 KW dimerization KW catalyst JO Modern Technologies and Scientific and Technological Progress AU Danilov, A.A. AU Istomina, A.A. PY 2026 IS 2026 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»