| 摘要 |
FIELD: process engineering. ^ SUBSTANCE: invention relates to chemical industry, namely, to catalysts to be used in gas-phase fluorination of halogenated hydrocarbons. Proposed catalyst comprises chromium oxides, the main component, in amount of approx. 95-80 wt % wherein chromium oxidation corresponds to atomic ratio O/Cr varying from 1.6 to 2.0, and additional components of Me metal compounds selected from the group including: Al(III), Fe(III), Co(II), Ni(II), Zn(II), Mg(II) or whatever mix thereof in amount of 0.01-15.0 wt % in terms of oxides comprising water in amount of not over 3.0 wt %, anion admixtures, e.g. C, NO3Çè-, SO4Çè2- in amount of not over 0.15 wt %, carbon in amount of 0.5-5.0 wt %. It features shape of cylindrical granules with diameter of 3-10 mm, hardness of 5-40 kg/cm2, bulk density of 0.4-0.8 g/cm3, specific surface of 50-250 m2/g, pore volume making at least 0.3 cm2/g, and single-mode distribution of pore sizes in the range of 200-500 ò. Invention covers also method of producing above described catalyst and method of fluorinating halogenated hydrocarbons using said catalyst. ^ EFFECT: higher catalyst activity at 300-380C, high strength and satisfactory pore structure. ^ 7 cl, 9 ex, 2 tbl, 5 dwg |
