HYDROCARBON DEHYDROGENATION CATALYST PREPARATION METHOD AND CATALYST OBTAINED BY THIS METHOD Russian patent published in 2008 - IPC B01J23/26 B01J21/04 B01J37/03 C07C5/333 

FIELD: hydrogenation-dehydrogenation catalysts.

SUBSTANCE: invention relates to methods of preparing alumino-chromium catalysts and their compositions for dehydrogenation of С2-С5-paraffin hydrocarbons into corresponding olefins. A method for preparing above-said alumino-chromium catalyst and catalyst prepared by this method are disclosed. Method comprises providing saturated solution of water-soluble chromium and aluminum salts, heating solution to 80-90°C, precipitating alumino-chromium hydroxide by passing ammonia gas through saturated solution until pH 9.5-10 is attained, drying resulting slurry of hydroxides at 100-120°C and subsequent calcination of dry powder for 5 h at temperature not higher than 550°C. Starting components are taken in such amounts as to ensure, after calcination, contents of chromium oxide 10-30% (the rest: aluminum oxide). Chromium oxide is composed of chromium(VI) and chromium(III) oxides, wherein proportion of chromium(VI) oxide in chromium oxide mixture is at least 20 wt %.

EFFECT: simplified catalyst preparation procedure and increased activity and selectivity of catalyst in paraffin hydrocarbon dehydrogenation process.

4 cl, 2 ex