CATALYST FOR OXIDATIVE OF DEHYDROGENATION OF BUTENE TO OBTAIN BUTADIENE AND METHOD FOR PRODUCTION THEREOF Russian patent published in 2018 - IPC B01J23/76 B01J37/03 C07C5/48 

FIELD: chemistry.

SUBSTANCE: invention relates to a catalyst for oxidative dehydrogenation of butene to produce butadiene, a process for production and use thereof. Catalyst comprises a compound, having a general structural formula Zn_aAl_bM_cFe_eO_f Z(α-Fe₂O₃), in which M is at least one element selected from a group consisting of Be, Mg, Ca, Sr, Mn, Ba, Cu, Co and Ni; Z denotes the content α-Fe₂O₃ in the catalyst, expressed in wt%, and 10%≤Z≤70%; the ratio of a: b: c: e: f is the ratio of the number of atoms Zn: Al: M: Fe: O contained in the catalyst, b is 1, then 0≤a≤10, 0<c≤4, 3≤e≤25, 4,5<f≤48; and Zn, Al, M, Fe and O are in the catalyst in states with valencies of +2, +3, +2, +3 and -2, respectively. Process of preparing the catalyst comprises preparing a solution of a mixture of salts containing elements of Al, M, and Fe, with or without inclusion of the Zn element, addition of a solution of NaOH or an ammonia solution as a precipitating agent, so that a pH value ranging from 8 to 12 is provided during precipitation and the finished catalyst is obtained after aging, drying and calcining the precipitate. Catalyst is used in the oxidative dehydrogenation reaction of butene to produce butadiene, where the reaction is carried out at a temperature in the range 300 ~ 500°C, space velocity in the range 200 ~ 500 h^-1, molar ratio of the amount of oxygen to the amount of butene ranging from 0.6 to 0.9, and molar ratio of the amount of water to the amount of butene, which is in the range of 6 ~ 20, using as a raw material butene, oxygen-containing gas and water vapour.

EFFECT: catalyst of the present invention eliminates challenges of prior art, such as low catalytic activity, low selectivity of conversion into the desired product and faster deactivation of the catalyst.

10 cl, 1 dwg, 5 tbl, 25 ex