Continuous production process of perfluor-2-methyl-3-pentanone
A technology of methyl and pentanone, which is applied in the chemical industry, sustainable manufacturing/processing, organic chemistry, etc., and can solve problems such as complex processes
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Embodiment 1
[0090] Preparation of hexafluoropropylene dimer: add KF / tetramethylethylenediamine / acetonitrile into the reaction kettle at a mass ratio of 1 / 2 / 100, stir at 40°C for one hour, then transfer to the catalyst solution storage tank for use. The hexafluoropropylene steel cylinder and catalyst solution storage tank are connected with the continuous reactor through a delivery pump. The catalyst solution is pumped in at 20 kg / hour, and hexafluoropropylene gas is fed in, the reaction time is controlled at 30-70 seconds, and the temperature is controlled at 25°C. Adjust the pressure of the hexafluoropropylene inlet to 0.1-0.3MPa; the outlet is connected to the phase separation kettle, the catalyst solution in the upper layer enters the catalyst storage tank for the reaction cycle, the lower layer is the crude product of hexafluoropropylene dimer, and the pure product is obtained by rectification , yield 32%.
Embodiment 2
[0092] Preparation of hexafluoropropylene dimer: add KF / tetrabutylammonium fluoride / acetonitrile into the reaction kettle at a mass ratio of 1 / 4.5 / 100, stir at 40°C for one hour, then transfer to the catalyst solution storage tank for use. The hexafluoropropylene steel cylinder and catalyst solution storage tank are connected with the continuous reactor through a delivery pump. The catalyst solution is pumped in at 20 kg / hour, and hexafluoropropylene gas is fed in, the reaction time is controlled at 30-70 seconds, and the temperature is controlled at 25°C. Adjust the pressure of the hexafluoropropylene inlet to 0.1-0.3MPa; the outlet is connected to the phase separation kettle, the catalyst solution in the upper layer enters the catalyst storage tank for the reaction cycle, the lower layer is the crude product of hexafluoropropylene dimer, and the pure product is obtained by rectification , yield 45%.
Embodiment 3
[0094] Preparation of hexafluoropropylene dimer: add KF / 18-crown ether-6 / acetonitrile into the reaction kettle at a mass ratio of 1 / 4.6 / 100, stir at 40°C for one hour, then transfer to the catalyst solution storage tank for use. The hexafluoropropylene steel cylinder and catalyst solution storage tank are connected with the continuous reactor through a delivery pump. The catalyst solution is pumped in at 20 kg / hour, and hexafluoropropylene gas is fed in, the reaction time is controlled at 30-70 seconds, and the temperature is controlled at 25°C. Adjust the pressure of the hexafluoropropylene inlet to 0.1-0.3MPa; the outlet is connected to the phase separation kettle, the catalyst solution in the upper layer enters the catalyst storage tank for the reaction cycle, the lower layer is the crude product of hexafluoropropylene dimer, and the pure product is obtained by rectification , The yield was 76%.
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