HYDROCARBON FEEDSTOCK PYROLYSIS CATALYST, METHOD FOR PREPARATION THEREOF, AND A METHOD OF HYDROCARBON FEEDSTOCK PYROLYSIS INTO LOWER OLEFINS

摘要

FIELD: petrochemical process catalysts.;SUBSTANCE: catalyst constitutes cements formed during heat treatment and depicted by general formula MeO·nAl₂O₃, where Me is at least one group IIA element and n is number from 1.0 to 6.0, containing modifying component selected from at least one oxide of magnesium, strontium, copper, zinc, indium, chromium, manganese, and strengthening additive: boron and/or phosphorus oxide. The following proportions of components are used, wt %: MeO 10.0-40.0, modifying component 1.0-5.0, boron and/or phosphorus oxide 0.5-5.0, and alumina - the balance. Catalyst is prepared by dry mixing of one group IIA element compounds, aluminum compounds, and strengthening additive followed by mechanochemical treatment on vibromill, molding of catalyst paste, drying, and calcination at 600-1200°C. Modifying additive is incorporated into catalyst by impregnation and succeeding calcination. Method of pyrolysis of hydrocarbon feedstock producing C₂-C₄-olefins is also described.;EFFECT: increased yield of lower olefins.;3 cl, 2 tbl, 18 ex