Synthesis production process of difluorochloroacetic acid
A difluorochloroacetic acid and production process technology, applied in the direction of sulfur compounds, chlorine/hydrogen chloride, acid halide preparation, etc., can solve the problems of many by-products and high prices, achieve high absorption rate and total yield, low energy consumption, Reasonable effect of preparation process design
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[0022] Example 1
[0023] Such as figure 1 The shown synthetic production process of difluorochloroacetic acid includes the following steps:
[0024] (1) Using a batch process, press sulfur trioxide into the oxidation reaction kettle with nitrogen, and start stirring;
[0025] (2) After reaching a certain temperature, add difluorotetrachloroethane and catalyst to the oxidation reactor according to the specified ratio;
[0026] (3) Start the heating reaction and observe the reflux status. When the temperature of the kettle rises to a certain temperature but the reflux is very small, the oxidation reaction of the raw material difluorotetrachloroethane is basically finished;
[0027] (4) Start the operation of by-product sulfuryl chloride by steaming, and then proceed to the hydrolysis process: a batch process is adopted, a certain amount of water is first added to the hydrolysis reactor, and sulfuryl chloride is slowly added dropwise, and the hydrolysis is carried out at a temperature of...
Example Embodiment
[0037] Example 2
[0038] A synthetic production process of difluorochloroacetic acid, including the following steps:
[0039] (1) Using a batch process, press sulfur trioxide into the oxidation reaction kettle with nitrogen, and start stirring;
[0040] (2) After reaching a certain temperature, add difluorotetrachloroethane and catalyst to the oxidation reactor according to the specified ratio;
[0041] (3) Start the heating reaction and observe the reflux status. When the temperature of the kettle rises to a certain temperature but the reflux is very small, the oxidation reaction of the raw material difluorotetrachloroethane is basically finished;
[0042] (4) Start the operation of by-product sulfuryl chloride by steaming, and then proceed to the hydrolysis process: a batch process is adopted, a certain amount of water is first added to the hydrolysis reactor, and sulfuryl chloride is slowly added dropwise, and the hydrolysis is carried out at a temperature of 20-100 ℃ with stirring....
Example Embodiment
[0052] Example 3
[0053] A synthetic production process of difluorochloroacetic acid, including the following steps:
[0054] (1) Using a batch process, press sulfur trioxide into the oxidation reaction kettle with nitrogen, and start stirring;
[0055] (2) After reaching a certain temperature, add difluorotetrachloroethane and catalyst to the oxidation reactor according to the specified ratio;
[0056] (3) Start the heating reaction and observe the reflux status. When the temperature of the kettle rises to a certain temperature but the reflux is very small, the oxidation reaction of the raw material difluorotetrachloroethane is basically finished;
[0057] (4) Start the operation of by-product sulfuryl chloride by steaming, and then proceed to the hydrolysis process: a batch process is adopted, a certain amount of water is first added to the hydrolysis reactor, and sulfuryl chloride is slowly added dropwise, and the hydrolysis is carried out at a temperature of 20-100 ℃ with stirring....
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