Catalyst for preparing butadiene through oxidative dehydrogenation of butene and preparation method thereof
An oxidative dehydrogenation and catalyst technology, which is applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of low selectivity of butadiene
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Embodiment 1
[0038] Weigh an appropriate amount of ferric nitrate (Fe(NO 3 ) 3 9H 2 O), magnesium nitrate (Mg(NO 3 ) 2 ·6H 2 O) and antimony trichloride (SbCl 3 ) was dissolved in 4L deionized water, and stirred evenly to form a solution. Then the above solution was co-precipitated with 20% ammonia solution, stirred at a high speed during the precipitation process, the pH value of the precipitation was kept at 7, and the precipitation temperature was room temperature. Washed with water, the resulting solid was dried in an oven at 110°C for 5 hours. The dried sample was calcined in a muffle furnace at 500°C for 4 hours to obtain Catalyst 1, which was ground into 40-60 mesh particles for catalyst evaluation. The average grain size of catalyst 1 calculated by Scherrer's formula is 9.5nm. The elemental composition of Catalyst 1 has a molar ratio of MgFe 2 o 4 · Fe 0.2 Sb 0.01 o x .
Embodiment 2
[0040] Weigh an appropriate amount of ferric nitrate (Fe(NO 3 ) 3 9H 2 O), magnesium nitrate (Mg(NO 3 ) 2 ·6H 2 O) and antimony trichloride (SbCl 3 ) was dissolved in 4L deionized water, and stirred evenly to form a solution. Then the above solution was co-precipitated with 10% ammonia solution, stirred at high speed during the precipitation process, the pH value of the precipitation was kept at 5, and the precipitation temperature was room temperature. Washed with water, the resulting solid was dried in an oven at 90°C for 24 hours. The dried sample was calcined in a muffle furnace at 400° C. for 24 hours to obtain Catalyst 2, which was ground into 40-60 mesh particles for catalyst evaluation. The average grain size of catalyst 2 calculated by Scherrer's formula is 8.2nm. The molar ratio of the element composition of catalyst 2 is MgFe 2 o 4 · Fe 0.01 Sb 0.01 o x .
Embodiment 3
[0042] Weigh an appropriate amount of ferric nitrate (Fe(NO 3 ) 3 9H 2 O), magnesium nitrate (Mg(NO 3 ) 2 ·6H 2 O) and antimony trichloride (SbCl 3 ) was dissolved in 4L deionized water, and stirred evenly to form a solution. Then the above solution was co-precipitated with 30% ammonia solution, stirred at a high speed during the precipitation process, the pH value of the precipitation was kept at 8, and the precipitation temperature was room temperature, and then the solid sample in the precipitation product was separated with a centrifuge, and deionized Washed with water, the resulting solid was dried in an oven at 150°C for 2 hours. The dried sample was calcined in a muffle furnace at 600°C for 3 hours to obtain catalyst 3, which was ground into 40-60 mesh particles for catalyst evaluation. The average grain size of catalyst 3 calculated by Scherrer's formula is 24.6 nm. The molar ratio of the element composition of catalyst 3 is MgFe 2 o 4 · Fe 0.05 Sb 0.01 o ...
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