| 摘要 |
FIELD: petrochemical process catalysts. ^ SUBSTANCE: invention relates to a method of preparing catalysts for dehydrogenation of paraffin hydrocarbons into corresponding olefin hydrocarbons. Method comprises impregnating thermochemically activated hydroargillite with chromium. alkali metal, titanium, and hafnium compound solutions, drying, and calcination at 700-800°C. Catalyst is molded during thermoactivation of hydrated thermochemically activated hydroargillite together with chromium, zirconium, alkali metal compounds and titanium, zirconium, and hafnium oxides. Catalyst contains (on conversion to oxides): 10-20% chromium (as Cr2O3), 0.5-3,5% alkali metal, and 0.05-5% sum of zirconium, hafnium, and titanium oxides, with balancing amount of alumina obtained from thermochemically activated hydroargillite as precursor, provided that oxide ratio Ti/Zr/Hf is (0.001-0.05):1:(0.01-0.3). ^ EFFECT: increased mechanical strength of catalyst, catalytic activity, selectivity, stability, reduced coking, and reduced yield of catalyst and yield of olefins. ^ 5 cl, 1 tbl, 6 ex |
