The reason why the condenser reflux liquid temperature drops rapidly during R23 distillation from time to time
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During the distillation process of R23, from time to time the liquid temperature of the condenser outlet drops rapidly, resulting in impure product quality. What is the cause of this? R23 is trifluoromethane, a by-product of the production of difluorochloromethane
Are you talking about the distillation of F23 from F22 or the specialized distillation and recovery of F23? Check to see if there is gas accumulation in your condenser, causing unstable heat exchange
R23 emissions are small, causing the temperature to drop too quickly
The recovery process of R23 is generally that the gas from the top of the HC separation tower is washed with water (falling film absorption to produce acid), alkali washed, and dried, then enters the gas compressor to boost pressure, and then enters the distillation tower after being cooled. The most important point in the process is to ensure the pressure of the buffer tank in front of the gas compressor, so a compressed gas replenishment buffer tank is set up. If the amount of organic phase material in front is small, the replenishment valve opening is large, resulting in a reduction in the amount of material entering the rectification tower. When the cooling capacity is constant, the reflux temperature decreases. In fact, it can be solved by adding an intermediate tank in front of the distillation tower and using a pump to stably feed the distillation tower, but it requires investment in equipment, pumps, instruments, etc. and power consumption.
Is the load low and the reaction conversion rate too high?；
This problem is relatively easy to deal with. I just encountered it in the early stage and dealt with it in time. If necessary, you can chat privately