Method for producing 1-chlorine-3,3,3-triflupropylene
A technology of trifluoropropene and pentachloropropane, applied in the field of gas-phase fluorination reaction to obtain 1-chloro-3, which can solve the problems of fast carbonization rate on the surface of the catalyst, low yield of HCFC-1233zd, high reaction temperature, etc.
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Embodiment 1
[0022] 10.97g SnCl 4 Dissolve in 100ml hydrochloric acid acidified distilled water to make impregnation solution, then add 100g AlF 3 The carrier was placed in the immersion solution, and after 5 hours of immersion, the water was evaporated to dryness on a rotary evaporator at 60°C to obtain a Sn with a tin content of 5%. 4+ / AlF 3 Fluorination catalyst. Before the reaction, hydrogen fluoride is fed separately in advance to fluorinate the catalyst.
[0023] Add 50ml of 5% Sn to a carbon steel pipe with an inner diameter of 38mm 4+ / AlF 3 Catalyst, heated to 150°C in a nitrogen stream. Stop nitrogen flow, feed HF and HCC-240fa to react, control the molar ratio of HF and HCC-240fa to 8:1, contact time is 5 seconds, after 20 hours of reaction, the reaction product is washed with water and alkali to remove HCl and HF , The conversion rate of HCC-240fa and the selectivity of HCFC-1233zd were analyzed by gas chromatography, and the results are shown in Table 1.
Embodiment 2
[0025] The same operation as in Example 1, except that the reaction temperature was changed to 100° C., the reaction results are shown in Table 1.
Embodiment 3
[0027] The same operation as in Example 1, except that the reaction temperature was changed to 180° C., the reaction results are shown in Table 1.
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