Catalyst for preparing pentafluoroethane, manufacturing method of the catalyst
A technology of pentafluoroethane and trifluoroethane is applied in the field of preparing the catalyst and can solve the problems of low selectivity of HFC-125 and the like
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Embodiment 1
[0035] Catalysts 1 to 5 for fluorination are based on figure 1 Prepared by the method shown in the steps. exist figure 1 Among them, catalyst 1 is composed of chromium oxide and magnesium oxide, catalyst 2 is composed of chromium oxide and iron oxide, catalyst 3 is composed of chromium oxide and molybdenum oxide, catalyst 4 is composed of chromium oxide and vanadium oxide, and catalyst 5 is composed of chromium oxide and aluminum oxide. composition. Next, a catalyst composed of chromium oxide and magnesium oxide will be described.
[0036] In 1kg chromium(III) nitrate (Cr(NO 3 ) 3 9H2O) was dissolved in distilled water, and 0.391kg of ammonia (NH2O) was added dropwise 4 OH), so that blue-gray chromium hydroxide (Cr(OH) 3 )precipitation. The precipitate was washed well with hot distilled water, filtered and dried at 100°C for 24 hours to obtain solid chromium hydroxide. The chromium hydroxide thus obtained is ground into powder with a ball mill or a mortar, and then hea...
Embodiment 2
[0039] (Preparation of catalyst 2 (chromium oxide-iron oxide catalyst))
[0040] Catalyst 2 is prepared in the same manner as in Example 1, except that iron nitrate [Fe(NO 3 ) 2 ·6H 2 O] instead of magnesium nitrate.
Embodiment 3
[0042] (Preparation of catalyst 3 (chromium oxide-molybdenum oxide catalyst))
[0043] Catalyst 3 is prepared in the same manner as in Example 1, except that ammonium molybdate [(NH 4 ) 6 Mo 7 o 24 ] instead of magnesium nitrate.
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