Method for continuously producing N,N-diethyl formamide by one-step method
A technology of diethylformamide and diethylamine, which is applied in the preparation of carboxylic acid amides, chemical instruments and methods, separation/purification of carboxylic acid amides, etc., can solve problems such as difficulty in product separation, complex production process, and impact on product quality. , to achieve the effects of cheap and easy-to-obtain raw materials, low equipment investment, and reduced production costs
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Embodiment 1
[0025] as attached figure 1 For the process equipment shown, 120kg of diethylamine, 10kg of methanol and 2kg of sodium methoxide are added to a 200L Venturi jet reactor. After the nitrogen replacement is qualified, CO is introduced, and the Venturi jet reactor circulation pump is turned on. The reaction temperature is controlled at 120°C. , the reaction pressure is 1.5MPa, and after reacting for about 3 hours, the sample analysis diethylamine conversion rate is 100%, and the product selectivity is 98.9%. components, and then rectified under reduced pressure to obtain the product N,N-diethylformamide with a product content of 99.97%.
Embodiment 2
[0027] Add 120kg of diethylamine, 5kg of methanol and 1kg of sodium methoxide into a 200L Venturi jet reactor, return about 5kg of light components recovered by rectification to the reactor through the filter, and react the previous batch in the filter The catalyst left by filtration is brought into the reactor to continue to participate in the reaction. After the reactor is replaced with nitrogen, CO is introduced, and the Venturi jet reactor circulation pump is turned on. The reaction temperature is controlled at 100°C, the reaction pressure is 1.8MPa, and the reaction is about After 2.5 hours, sampling analysis showed that the conversion rate of diethylamine was 100%, and the product selectivity was 98.7%. , N-Diethylformamide, the product content is 99.96%.
Embodiment 3
[0029] Add 100kg of diethylamine, 15kg of methanol and 4kg of sodium methoxide into a 200L Venturi jet reactor, pass CO into the reactor after passing the nitrogen replacement, turn on the circulation pump of the Venturi jet reactor, control the reaction temperature to 100°C, and react The pressure was 2 MPa, and after about 2 hours of reaction, the conversion rate of diethylamine was 100% and the product selectivity was 98.8%. The reaction material is filtered through a filter at a rate of 75kg / h and cooled, and then sent to the crude product tank to be rectified. At the same time, the diethylamine feed pump and the configured methanol sodium methoxide solution pump are turned on, and the diethylamine is fed at a rate of 40kg / hour. Add the sodium methoxide and methanol into the reactor at a rate of 3:10, then feed them into the reactor at a rate of 0.15kg / h through the feed pump, while maintaining the pressure at 2MPa and the temperature at 100°C for continuous reaction , kee...
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