Method for distilling and refining nicotine circularly and nicotine distilling and absorbing device
A technology of nicotine and distillation pot, which is applied in the direction of distillation in boiler/distillate, distillation adjustment/control, organic chemistry, etc. It can solve the problems of high vacuum conditions, cumbersome process, and large consumption of organic solvents to improve product purity. , simple process and low reagent consumption
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Embodiment 1
[0015] like figure 1 The shown distillation absorption equipment has a heating device 1, a distillation pot 2, and a condensing device. The condensing device has a condensing pipe 4 and a control reflux device positioned at the bottom of the condensing pipe. The control reflux device is a reflux funnel 3, and the reflux funnel The outlet end of the outlet is provided with a return valve 6. The still 2 is provided with a thermometer 5 for observing the distillation temperature.
[0016] use as figure 1 The method for refining nicotine by circulating distillation of the nicotine solution by the equipment shown is as follows: 1. First, use sodium hydroxide to adjust the pH of the nicotine solution with a content of 80-90% to 10-12; Add 1% (w / v) sodium chloride into the still, and add 1% (w / v) sodium chloride; 3. Add petroleum ether with a nicotine content of 2-5 volume times to the reflux device of the still, turn on the heating, and control the boiling point at 106- Distill a...
Embodiment 2
[0019] Take 50ml of nicotine solution containing 85% nicotine, adjust the pH to 11 with sodium hydroxide, put the alkalized nicotine solution in the still 2, place the still 2 on the heating device 1, and control the reflux The return valve 6 of the device is closed. Take 170ml of ethyl acetate and place it in the reflux funnel 3. Turn on the heating, count when there is condensed liquid dripping into the reflux funnel 3, fine-tune the reflux valve 6, control the height of the water phase to about 2 cm, keep the condensed water continuously refluxed into the three-necked flask 2, and continue the circular distillation for 1.5 hours. Heating was stopped, and when the temperature at the bottom of the kettle dropped below 60°C, the ethyl acetate absorption solution was poured out, and 170ml of ethyl acetate was added to the reflux funnel 3 again, and the circular distillation was repeated for 1.5h. The two ethyl acetate absorption solutions were combined and concentrated in vacu...
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