Production method of ethylenediamine
A technology of ethylenediamine and ethanolamine, applied in chemical instruments and methods, preparation of amino compounds, preparation of organic compounds, etc., can solve problems such as ammonia recovery and water separation difficulties
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Embodiment 1
[0057] The reaction temperature of the ammoniation reactor is 180°C, the reaction pressure in terms of absolute pressure is 6MPa, and in terms of mass percentage, the reaction product is composed of 13.35% of water, 46.08% of ethanolamine, 27.6% of ethylenediamine, 1.14% of diethylenetriamine, three Ethylenediamine is 3.61%, piperazine is 4.7%, hydroxyethylpiperazine is 3.5%, and the single pass conversion rate of ethanolamine is 50.59%.
[0058] The theoretical plate number of the ammonia recovery tower is 25. In terms of absolute pressure, the operating pressure at the top of the ammonia recovery tower is 25kPa, the temperature at the top of the tower is -9°C, the temperature of the deamination tower is 163°C, and the liquid ammonia content in the bottom of the tower is less than 0.2 %.
[0059] Dehydration tower theoretical plate number is 20, selects toluene and n-butyl acetate composition as entrainer, wherein toluene and n-butyl acetate mass ratio are 80:20, in absolute ...
Embodiment 2
[0062] The reaction temperature of the ammoniation reactor is 190°C, the reaction pressure is 9MPa in terms of absolute pressure, and the reaction product is composed of 13.91% of water, 42.91% of ethanolamine, 33.01% of ethylenediamine, 0.77% of diethylenetriamine, and three Ethylenediamine is 2.93%, piperazine is 3.86%, hydroxyethylpiperazine is 2.59%, and the single pass conversion rate of ethanolamine is 52.99%.
[0063] The theoretical plate number of the ammonia recovery tower is 30. In terms of absolute pressure, the operating pressure at the top of the ammonia recovery tower is 35kPa, the temperature at the top of the tower is -5°C, the temperature at the bottom of the deammonization tower is 168°C, and the liquid ammonia content at the bottom of the tower is less than 0.15 %.
[0064] The number of theoretical plates of the dehydration tower is 25, and the composition of benzene and n-propyl acetate is selected as the entrainer, wherein the mass ratio of benzene and n...
Embodiment 3
[0067] The reaction temperature of the ammoniation reactor is 200°C, the reaction pressure in terms of absolute pressure is 12MPa, and in terms of mass percentage, the reaction product is composed of 14.57% of water, 40.63% of ethanolamine, 32.97% of ethylenediamine, 1.23% of diethylenetriamine, three Ethylenediamine is 3.35%, piperazine is 4.50%, hydroxyethylpiperazine is 2.72%, and the single pass conversion rate of ethanolamine is 54.89%.
[0068] The theoretical plate number of the ammonia recovery tower is 40. In terms of absolute pressure, the operating pressure at the top of the ammonia recovery tower is 45kPa, the temperature at the top of the tower is 1.3°C, the temperature at the bottom of the deamination tower is 176.8°C, and the liquid ammonia content at the bottom of the tower is less than 0.1%. .
[0069] Dehydration tower theoretical plate number is 35, selects toluene and sec-butyl acetate composition as entrainer, wherein toluene and sec-butyl acetate mass rat...
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