Catalyst for o-Fluoro nitrobenzene hydrogenation and its preparation and application
A technology of o-fluoronitrobenzene and a catalyst is applied in the field of heterogeneous catalytic hydrogenation of nitrobenzene to achieve the effects of reducing the content of nitrobenzene, reducing the temperature and pressure of the hydrogenation reaction, and improving the reaction performance and stability.
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Embodiment 1
[0015] Embodiment 1, Pt / C catalyst
[0016] Weigh 1.5 g of activated carbon carrier, add 2.0 ml of 0.0148 g-Pt / ml concentration of H 2 PtCl 6 solution, and 11ml 1NHCl / HNO 3 mixed solution (HCl / HNO 3 =3.7), after stirring at about 80°C for 6 hours, add anhydrous sodium carbonate to the solution pH=2.75, then add 0.6875 grams of anhydrous sodium acetate, finally add 1.06ml of formic acid solution, stir at about 80°C for 4 hours, pump Filter, wash until the pH value = about 6.5, dry naturally, and dry at 100°C for 4 hours before use.
Embodiment 2
[0017] Embodiment 2, Pt / Al 2 o 3 catalyst
[0018] Weigh 1.5 g of Al 2 o 3 Carrier, other preparation steps are identical with example 1.
Embodiment 3
[0019] Embodiment 3, Pt / SiO 2 catalyst
[0020] Weigh 1.5 g of SiO 2 Carrier, other preparation steps are identical with example 1.
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