Jointly recycling method for production residual liquid of tetrafluoroethylene and hexafluoropropylene
A technology of hexafluoropropylene and tetrafluoroethylene is applied in the field of combined recovery and utilization of tetrafluoroethylene and hexafluoropropylene production residue, which can solve the problems of high cost recovery, market instability, environmental pollution, etc., and achieve the effect of simplifying separation and recovery
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[0023] Please refer to figure 1 , Embodiment 1 of the present invention is:
[0024] A method for combined recovery and utilization of tetrafluoroethylene and hexafluoropropylene production residue, comprising:
[0025] Step 1, introduce the raffinate (TFE raffinate) produced in the production of tetrafluoroethylene into the raffinate joint recovery tower in the production of hexafluoropropylene, mix with the raffinate (HFP raffinate) produced in the production of hexafluoropropylene, and control The operating pressure of the raffinate combined recovery tower is 0.2-0.4MPa, the pressure difference is 20-40KPa, the temperature is 20-60°C, and the top i-C318≤0.02%, and then the mixed liquid is sent to the C318 rectification tower for refining Distillation, control the operating pressure of the C318 rectification tower to be 0.1-0.3MPa, the pressure difference is 20-40KPa, the temperature is 20-30°C, and the C318 at the top of the tower is ≥ 98%, so as to obtain C318 with a puri...
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