A kind of catalyst and application of acetone hydrogenation liquid-phase method to synthesize methyl isobutyl ketone
A kind of methyl isobutyl ketone, catalyst technology, applied in physical/chemical process catalyst, organic compound preparation, organic chemistry and other directions, can solve the problem that the activity and selectivity cannot meet the requirements of industrialization, etc.
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Embodiment 1
[0035] The surface of the fluorine-modified magnesium oxide support supports titanium dioxide and supported palladium, and the two are physically mixed to obtain a catalyst, which is denoted as TiO 2 / MgO-F&Pd / Cor.
[0036] Step (1): Fluorine-modified magnesium oxide (referred to as MgO-F)
[0037] Weigh 1.85g NH 4 F Add 100ml of distilled water to a polytetrafluoroethylene beaker, stir to make it dissolve in water, and prepare 0.5mol / L NH 4 F solution.
[0038] Weigh 6g of MgO powder in a Teflon beaker, add 100ml of NH 4 F solution (0.5 mol / L or 1 mol / L) was stirred at room temperature for 2 h, then filtered and washed with distilled water until the filtrate was neutral. The resulting filter cake was dried in an oven at 100 °C for 6 h. The dried filter cake was calcined in a muffle furnace at 450°C for 4h to obtain MgO-F.
[0039] Step (2):
[0040] Step (2-a): the surface of fluorine-modified magnesium oxide supports titanium dioxide (denoted as TiO 2 / MgO-F)
[004...
Embodiment 2
[0056] Application of Multifunctional Catalyst in Hydrogenation of Acetone to Prepare MIBK
[0057] 5.5ml of acetone was added to the inner lining of the autoclave, a mixed catalyst of supported titanium dioxide and supported palladium and a magnetic stirrer were added, the inner lining was put into the autoclave and the autoclave was tightly sealed. The high-pressure reactor is placed on the ZNCL-TS intelligent digital display magnetic electric heating jacket, the stirring switch is turned on, and the rotation speed is 600r / min. First, 0.2MPa nitrogen gas is introduced into the high-pressure reactor, and the gas in the reactor is discharged for 3 minutes. N 2 Row twice, pass through hydrogen 0.2MPa for the third time, and discharge the gas after 3 minutes. Close the exhaust valve, and then re-introduce hydrogen at 0.75MPa, close the intake valve and wait for the pressure gauge of the high-pressure reactor to stabilize at 0.75MPa for 5 minutes, then set the temperature of the...
Embodiment 3
[0067] The fluorine-modified magnesia support first supported titanium dioxide and then palladium (denoted as Pd / TiO 2 / MgO-F)
[0068] Step (1): Fluorine-modified magnesium oxide carrier supports titanium dioxide
[0069] First, pour 10ml of tetrabutyl titanate and 35ml of absolute ethanol into a flat-bottomed flask, and stir vigorously on a magnetic stirrer for 30min. Then weigh 5g of MgO-F and add it into a flat-bottomed flask, and continue to stir for 1h. Then pour the obtained liquid into a beaker, let it stand for precipitation, suck up the supernatant with a dropper, and leave a white precipitate, dry the white precipitate, put it into a crucible, and dry it in a muffle furnace at 500°C After burning for 3 hours, a sample was obtained, which was denoted as TiO 2 / MgO-F, grind, sieve, take 200-400 mesh for later use.
[0070] Step (2): TiO 2 / MgO-F supported palladium
[0071] The TiO that 5g step (1) obtains 2 / MgO-F impregnated in 7.5mL of 0.01mol / L H 2 PdCl 4...
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