| 摘要 |
FIELD: chemistry.SUBSTANCE: described is a method of producing an aluminium-chromium catalyst by mixing an aluminium support with a suspension having clay mineral concentration of 28-37 wt % and with aqueous solutions of chromic acid and potassium alkali. The aluminium-chromium support has specific surface area of not less than 80 m/g, contains not more than 30 wt % particles with size of less than 45 mcm, not more than 10 wt % particles with size of less than 20 mcm and not more than 1.0 wt % particles with size of more than 140 mcm. The obtained catalyst suspension is then spray dried. Also described is an aluminium-chromium catalyst which includes 12.0-16.0 wt % CrO, 8.0-13.0 wt % SiO, 2.0-3.6 wt % KO and NaO or only KO, AlO- the balance, where content of hexavalent chromium is 1.7-2.2 wt %.EFFECT: obtaining a catalyst with a uniform composition, high mechanical strength, catalytic activity, selectivity and stability in processes of hydrogenating paraffin hydrocarbons into corresponding olefin hydrocarbons.4 cl, 1 tbl, 13 ex |
