Process for synthesizing ethyl chloride
A technology of ethyl chloride and process, which is applied in the field of fine chemical synthesis, can solve the problems of hydrogen chloride gas emission, product yield reduction, high reaction temperature, etc., and achieve the effects of reducing pollution, increasing yield, and simplifying process steps
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Embodiment 1
[0027] The first pot: to 5M 3 Add 460kg of ethanol in the reaction kettle, anhydrous AlCl 3 300kg, 180kg of zinc chloride, heat up to 70°C and keep for 1h to dissolve the catalyst. Then the temperature is raised to 85°C, and 380kg of hydrogen chloride gas in the buffer tank enters the reaction kettle through the flowmeter through the bottom pipe, and the reaction temperature in the kettle is controlled at 85-90°C for 1 hour, and then the temperature is raised to 90-100°C. Reach about 3.5Kg / cm 2 , open the control valve, and the released mixed gas such as ethyl chloride, ethanol, water, etc., is sequentially condensed, pickled, alkali washed, condensed and other processes to obtain ethyl chloride. When the pressure in the kettle drops by 1.1Kg / cm 2 Finally, close the control valve and continue to heat up to 100-110°C for reaction. At this time, the pressure in the kettle reaches 3.7Kg / cm 2 , open the control valve, and the released mixed gas such as ethyl chloride, ethanol,...
Embodiment 2
[0030] The first pot: to 5M 3 Add 460kg of ethanol in the reaction kettle, anhydrous AlCl 3 360kg, 150kg of zinc chloride, heat up to 70°C for 1 hour to dissolve the catalyst. Then the temperature is raised to 85°C, and 400kg of hydrogen chloride gas in the buffer tank enters the reaction kettle through the flowmeter through the bottom pipe, and the reaction temperature in the kettle is controlled at 85-90°C for 1 hour, and the temperature is raised to 90-100°C for reaction. The pressure reaches 3.5Kg / cm 2 , open the control valve, and the released mixed gas such as ethyl chloride, ethanol, water, etc., is sequentially condensed, pickled, alkali washed, condensed and other processes to obtain ethyl chloride. When the pressure drops to 1.2Kg / cm 2 Finally, close the control valve, continue to heat up to 100 ~ 105 ° C reaction, when the pressure in the kettle reaches 3.5Kg / cm 2 , open the control valve, and the released mixed gas such as ethyl chloride, ethanol, water, etc., ...
Embodiment proportion 1
[0034] First pot: according to the scheme of embodiment 1, replace anhydrous AlCl with zinc chloride 480kg 3 300kg, zinc chloride 180kg, other operating procedures are the same. The ethyl chloride yield is 83.9%, which is lower than 90.2% of Example 1.
[0035] Set of pots: operate according to the scheme of Example 1, the ethyl chloride yield is 88.3%. Lower than 95.1% of Example 1.
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