Industrial preparation method of acryloyloxyethyl trimethyl ammonium chloride
A technology of acryloyloxyethyltrimethylammonium chloride and dimethylaminoethyl acrylate, which is applied in the preparation of aminohydroxy compounds, the preparation of organic compounds, chemical instruments and methods, etc., can solve the problem of unpleasant smell, product Low purity, waste of activated carbon and other problems, to achieve the effect of optimizing feeding time and rate, optimizing internal structure, and improving product yield
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preparation example Construction
[0046] The embodiment of the present invention provides an industrial preparation method of acryloyloxyethyl trimethyl ammonium chloride, and the industrial preparation method comprises:
[0047] (1) dimethylaminoethyl acrylate, deionized water and monochloromethane are added to the first-stage reactor for feeding;
[0048] (2) After the first-stage reactor completes feeding, transfer the material in the first-stage reactor to the second-stage reactor for 0.5-1.0 h; then the second-stage reactor The material in the reactor is transferred to the third-stage reactor to react for 0.5-1.0 h to obtain the primary product;
[0049] (3) the primary product is placed in a stripping tower for stripping treatment;
[0050] (4) The stripping tower bottom liquid obtained by the stripping treatment is placed in the fourth-stage reactor and stirred, and then the material in the fourth-stage reactor is transferred to the fifth-stage reactor and stirred. Stirring was performed to obtain the...
Embodiment 1
[0107] 1. 2500kg of dimethylaminoethyl acrylate and 746.67kg of deionized water are pumped into the first-stage reactor through a pipeline, and controlled to inject 1000kg of monochloromethane into the reactor at a constant speed within 1.0h, and the reaction is achieved at the feed rate. Start stirring when the minimum stirring liquid level of the device is started, and the stirring speed is 40rpm;
[0108] Ⅱ. The reaction starts after the first-stage reactor is put into monochloromethane, and then the temperature rises to about 35°C, and the ethylene glycol aqueous solution is adjusted to control the reaction temperature to rise to 41°C, and the pressure of the first-stage reactor is increased by the compressed air regulating valve. pressure to 0.7MPa;
[0109] Ⅲ. After the feeding is completed, transfer the material of the first-stage reactor to the second-stage reactor with a pump, and open the gas phase balance pipe between the first-stage reactor and the second-stage rea...
Embodiment 2
[0117] Embodiment 2 is basically the same as embodiment 1, and the difference lies in that: monochloromethane is 885kg.
[0118] In this example, the conversion rate of dimethylaminoethyl acrylate was 88%, and 2980.1kg of acryloyloxyethyltrimethylammonium chloride product was obtained. The product was a colorless and slightly turbid liquid with a purity of 79.2%. Degree is 1%, moisture is 19.9%.
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