A kind of multi-stage series reaction kettle and the method of using the device to prepare chlormequat
A tandem reaction and chlormequat technology, which is applied in the direction of feeding device, preparation of amino compounds, chemical instruments and methods, etc., can solve the problems of large volume of reaction kettle, poor heat transfer effect, long reaction time, etc., and achieve low labor intensity , easy production, short reaction time
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Embodiment 1
[0026] A multi-stage series reaction kettle, which is a 3-stage series reaction kettle. Such as figure 1 As shown, it includes a raw material tank 1, a mixing vessel 3, a first-stage reactor 4, a second reactor 5, and a third reactor 6 connected in series in sequence. The multi-stage series reaction kettle further includes a second raw material tank 2, and the first raw material tank 1 and the second raw material tank 2 are arranged in parallel and placed in front of the mixing container 3. A pressure reducing valve 7 is provided between the second reaction tank 5 and the third reaction tank 6. The bottom of the first-stage reactor 4 is connected with the second reactor 5, and the bottom of the second reactor 5 is connected with the third reactor 6. The volume of the first, second, and third-stage reactors is 1000L, and the first, second, and third-stage reactors are all equipped with cooling devices. The reactor has a built-in cooling system, and the refrigerant is water. ...
Embodiment 2
[0035] A multi-stage series reactor. Others are as described in Example 1. The difference is that the continuous multi-stage series reactor device is a 5-stage series reactor, in which the reaction temperature in the first stage reactor is 90°C, and the second The temperature of the 5-stage reactor is increased according to a 10°C gradient, until the temperature reaches 120°C, the subsequent reactor keeps the temperature at 120°C (that is, the temperature of the 5-stage reactor is 90°C, 100°C, 110°C, 120 ℃, 120℃); The volume of the reaction kettle is 2000L.
[0036] A method for preparing chlormequat by using 5-stage series reactors, adding dichloroethane in the raw material tank one, and adding trimethylamine in the raw material tank two; passing the above two raw materials into a static mixer for thorough mixing;
[0037] The dichloroethane and trimethylamine in the mixer are successively passed into the first four-stage reactor; after the pressure is reduced by the pressure redu...
Embodiment 3
[0041] A multi-stage series reactor. The others are as described in Example 1. The difference is that the continuous multi-stage series reactor device is an 8-stage series reactor, and the reaction temperature in the first-stage reactor is 80°C. The temperature of the ~8-stage reactor is increased according to a 7°C gradient until the temperature reaches 120°C, and the subsequent reactor keeps the temperature at 120°C (that is, the temperature of the 8-stage reactor is 80°C, 87°C, 94°C, 101℃, 108℃, 115℃, 120℃, 120℃). The volume of the reaction kettle is 3000L.
[0042] A method for preparing Chlormequat by using 8-stage series reactors, adding dichloroethane in the raw material tank one, and adding trimethylamine in the raw material tank two; passing the above two raw materials into a static mixer for thorough mixing;
[0043] The dichloroethane and trimethylamine in the mixer are successively passed into the first 7-stage reactor; after being decompressed by the pressure reducing...
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