Alpha-methyl styrene selective hydrogenation method
A methylstyrene, selective technology, used in chemical instruments and methods, hydrogenation to hydrocarbons, metal/metal oxide/metal hydroxide catalysts, etc. to achieve good anti-interference performance and good low-temperature activity
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Embodiment 1
[0020] Weigh 300 grams of pseudo-boehmite and 9 grams of fennel powder, mix them, and then add 12 grams of polyvinyl alcohol solution (5% mass concentration), 4.0 grams of nitric acid, 2.2 grams of phosphoric acid with a concentration of 85%, potassium nitrate 2.3 grams, 270 milliliters of an aqueous solution of 12 grams of magnesium nitrate, extruded into a clover with a diameter of 2.5 mm, and the wet strip was dried at 50°C for 24 hours and then calcined at 1000°C for 4 hours to obtain the carrier Z1. Take 100 g of the carrier to pre-soak the carrier with deionized water, then drain the water, and place the carrier in 0.3L PdCl 2 Impregnation was carried out in the impregnation solution (the mass concentration of Pd was 1g Pd / L) until the impregnation solution was colorless, drained, dried at 120°C for 4 hours, and calcined at 450°C for 4 hours to obtain Pd-based catalyst C1. The catalyst composition, specific surface area and pore volume are shown in Table 1.
[0021] Tak...
Embodiment 2
[0024] Weigh 300 grams of pseudo-boehmite, 9 grams of scallop powder, mix, then add 12 grams of polyvinyl alcohol solution (5% mass concentration), 4.0 grams of nitric acid, 1.2 grams of barium nitrate, 0.1 grams of silver nitrate, 25 270 ml of aqueous solution of 120 g of silica sol, extruded into a clover with a diameter of 2.5 mm, dried at 90°C for 8 hours and then calcined at 900°C for 4 hours to obtain alumina carrier Z2. Take 100 g of the carrier, pre-soak the carrier with deionized water, then drain the water, and place the carrier in 0.5 L PdCl 2 Impregnation was carried out in the impregnation solution (the mass concentration of Pd was 1g Pd / L) until the impregnation solution was colorless, drained, dried at 120°C for 4 hours, and calcined at 450°C for 4 hours to obtain Pd-based catalyst C2. The catalyst composition, specific surface area and pore volume are shown in Table 1.
[0025] Take 100 ml of C2 catalyst and reduce it for 8 hours under the conditions of hydrog...
Embodiment 3
[0028]Weigh 300 grams of pseudo-boehmite, 9 grams of scallop powder, mix, then add 12 grams of polyvinyl alcohol solution (5% mass concentration), 4.0 grams of nitric acid, 9.0 grams of calcium nitrate, and 85% phosphoric acid 270 milliliters of 5.6 grams of aqueous solution was extruded into a clover with a diameter of 2.5 mm, and the wet strip was dried at 90° C. for 8 hours and then calcined at 1050° C. for 4 hours to obtain alumina carrier Z3. Take 100 g of the carrier, pre-soak the carrier with deionized water, then drain the water, and dissolve the carrier in 0.3 L PdCl 2 The impregnating solution (where the mass concentration of Pd is 0.5 g Pd / L) was impregnated until the impregnating solution was colorless, drained, dried at 120°C for 4 hours, and calcined at 450°C for 4 hours to obtain Pd-based catalyst C3. The catalyst composition, specific surface area and pore volume are shown in Table 1.
[0029] Take 100 ml of C3 catalyst and reduce it for 8 hours under the cond...
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