CATALYST FOR OXIDATIVE DEHYDROGENATION OF ETHANE TO ETHYLENE AND A METHOD FOR PRODUCTION THEREOF Russian patent published in 2020 - IPC B01J23/22 B01J23/28 B01J27/125 B01J27/132 C07C5/48 

FIELD: technological processes.

SUBSTANCE: invention relates to production of ethylene from ethane by catalytic oxidative conversion with separate supply of raw material and an oxidant and simultaneous production of technical nitrogen from air and can be used in chemical and petrochemical industries. Disclosed is a catalyst for oxidative dehydrogenation of ethane to ethylene, containing oxides of vanadium and molybdenum, deposited on aluminum oxide, which is further modified by fluorine at ratio F/Al, equal to 1/1000–1/10, at following ratio of components, wt%: vanadium and molybdenum oxides 5–40, fluorine-modified aluminum oxide – balance, with weight ratio of molybdenum to vanadium equal to 3–6. Catalyst can additionally contain niobium oxide in amount of 0.1–5 wt%. To obtain the catalyst, aluminum oxide is pre-treated with ammonium fluoride solution to obtain fluorine-modified aluminum oxide. Ammonium paramolybdate and ammonium metavanadate are then dissolved in water, fluorine-modified aluminum oxide is added and subjected to hydrothermal treatment for 8–36 hours at temperature of 100–180 °C. Drying is carried out in two steps – first by withering in air without heating, then heated to 100–200 °C, and calcination in three steps – 2–4 hours at 300–350 °C, 2–3.5 hours at 500 °C and 1–3.5 hours at 600–700 °C.

EFFECT: high selectivity for ethylene and its output.

5 cl, 1 tbl, 12 ex