METHOD FOR OXIDATIVE CONVERSION OF ETHANE INTO ETHYLENE Russian patent published in 2017 - IPC C07C5/48 C07C11/04 B01J23/22 B01J23/28 B01J27/57 B01J23/20 B01J23/26 B01J23/755 

FIELD: chemistry.

SUBSTANCE: method comprises feeding ethane to a dehydrogenation reactor, where it contacts with a dehydrogenation catalyst based on metals oxides, the catalytic dehydrogenation of ethane at increased temperature, the separation of the reaction products from the recovered catalyst, feeding the recovered catalyst after separation from the reaction products into the oxidation reactor, the oxidation of the recovered catalyst with atmospheric oxygen at increased temperature in a fluidized bed, which is created by transport nitrogen in the oxidation reactor, the separation of gas mixtures containing exhaust air and transport nitrogen from the regenerated oxidized catalyst, and its returning to the dehydrogenation reactor. Said catalyst is represented by vanadium pentoxide on γ-Al₂O_3, or a mixed oxide of metals Mo-Te-Nb-V on γ-Al₂O₃, or chromium oxide (III) on γ-Al₂O₃ or a mixed oxide of metals V-Mo onγ-Al₂O₃, or a mixed oxide of metals Ni-Mo on γ-Al₂O₃; the catalyst circulation multiplicity defined as the ratio of the mass of the catalyst to the mass of the raw material fed into the reactor is 10÷15, the catalytic ethane dehydrogenation is carried out at a temperature of 500-700°C, the gas flow conveying the oxidized regenerated catalyst and containing exhaust air and transport nitrogen is removed from the system as technical nitrogen.

EFFECT: using the proposed method allows to provide explosion and fire safety of the ethane conversion to ethylene and the sufficient ethane conversion, the process stability, to increase selectivity as per ethylene, to obtain technical nitrogen together with the ethylene without using special devices for air separation.

3 cl, 1 dwg, 2 tbl, 14 ex