CATALYST FOR OXIDATIVE ALKANE DEHYDRATION Russian patent published in 2022 - IPC B01J23/26 B01J23/22 B01J21/04 B01J23/10 B01J23/02 B01J21/12 B01J29/70 B01J29/85 B01J35/08 B01J37/02 C07C5/333 C07C5/48 

FIELD: chemistry.

SUBSTANCE: invention relates to a catalyst for producing olefins from light alkanes by oxidative dehydration and to a method for production thereof. Catalyst includes: a) a catalyst base material in the form of microspheres, including an inorganic nitrate binder (aluminium nitrate), silicon dioxide selected from SBA-15 or colloidal silicon dioxide, or silicon dioxide-aluminium oxide selected from selected from MCM-41, SAPO-11, or an amorphous silicon dioxide-aluminium oxide, and a hydrothermically stable aluminium oxide; wherein the hydrothermically stable aluminium oxide is produced through a modification of the aluminium oxide with lanthanum or cerium; b) a catalytic material containing a vanadium-chromium complex located on the catalyst base material in the form of microspheres; and c) a promoter including potassium oxide. Method for producing a catalyst includes: a) producing a hydrothermically stable lanthanum or cerium-modified aluminium oxide; b) conducting an interaction of the inorganic nitrate binder with water at 70°C, resulting in a transparent viscous binder solution; c) conducting an interaction of the binder solution with silicon dioxide or silicon dioxide-aluminium oxide and a hydrothermically stable aluminium oxide while stirring at 30°C, resulting in a suspension with a content of a solid substance for spray drying; d) spray-drying the suspension in order to produce the catalyst base material in the form of microspheres; e) calcining the base material at 650°C for 3 to 5 hours; f) impregnating the calcined base material with a vanadium-chromium-based complex, drying, and calcining at 600°C for 3 to 5 hours; and (g) impregnating the calcined base material with the promoter, drying, and calcining at 600°C for 3 to 5 hours.

EFFECT: excellent hydrothermal stability, high apparent bulk density, low exhaustion index, high alkane conversion, and high selectivity to olefins.

9 cl, 2 tbl, 1 ex