A kind of production technology of hexafluoroethane
A production process and technology of fluorinated catalysts, which are applied in halogen substitution preparation, organic chemistry, halogenated hydrocarbon disproportionation separation/purification, etc., and can solve problems such as unfavorable industrial production, difficult regeneration, high reaction temperature, etc.
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Embodiment 1
[0036] according to figure 1connection shown. Fill the chromium-based catalyst in the first reactor 3 and the second reactor 11, the reaction conditions of the first reactor 3 are controlled to be about 380° C. of reaction temperature and about 0.25 MPa of reaction pressure, and the reaction conditions of the second reactor 11 are controlled as The reaction temperature is 420°C and the reaction pressure is 0.25Mpa. The rectification temperature of the rectification tower is controlled to be 35°C at the bottom of the tower and -30°C at the top of the tower. The stream 1 of the raw materials R113a and HF is added from the top of the first reactor 3 in the gas phase via the stream 2, so that the molar ratio of R113a to HF is 1:4, the residence time is 40s, and the stream 4 containing R114 and R115 is obtained at the bottom of the tower. The stream 4 containing R114 and R115 is then added to the separation tower 6, the stream 7 containing R116 and HCl is obtained from the top of ...
Embodiment 2
[0042] The reaction was carried out under the same operating conditions as in Example 1, except that the reaction temperature of the first reactor 3 was changed to about 400°C.
[0043] After analysis:
[0044] (1) The result of the first reactor 3 is: the conversion rate of R113a is 96.8%, and the reaction product composition is 20.1% for R116, 59.7% for R115, 16.0% for R114, 3.2% for R113a, and 1.0% for other components;
[0045] (2) The result of the second reactor 11 is: the selectivity of R116≥98.8%, and the reaction product composition is 74.7% for R116, 23.1% for R115, 1.0% for R114, and 1.2% for other components;
[0046] (3) The purity of R116 obtained in stream 7 is 97.8%.
[0047] The R116 obtained from stream 7 with a purity of 97.8% enters the product post-treatment system, and after washing, compressing, drying, and rectifying, an R116 product with a purity higher than 99.9% can be obtained.
Embodiment 3
[0049] The reaction was carried out under the same operating conditions as in Example 1, except that the reaction pressure in the first reactor 3 and the second reactor 11 was changed to about 0.35 MPa.
[0050] After analysis:
[0051] (1) The result of the first reactor 3 is: the conversion rate of R113a is 97.2%, and the reaction product composition is 19.7% for R116, 58.1% for R115, 19.0% for R114, 2.2% for R113a, and 1.0% for other components;
[0052] (2) The result of the second reactor 11 is: the selectivity of R116≥99%, and the reaction product composition is 76.5% for R116, 21.5% for R115, 1.0% for R114, and 1.0% for other components;
[0053] (3) The purity of R116 obtained in stream 7 is 98.2%.
[0054] The R116 obtained from stream 7 with a purity of 98.2% enters the product post-treatment system, and after washing, compressing, drying, and rectifying, an R116 product with a purity higher than 99.9% can be obtained.
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