Preparation process of tetrabutyl urea
A tetrabutyl urea, preparation technology, applied to the preparation of urea derivatives, preparation of organic compounds, chemical instruments and methods, etc., can solve the problem that the yield of finished products is only 80%-85%, there are many by-products, and it is difficult to industrialize and other issues, to achieve the effect of cheap raw materials, good product quality, and easy access to raw materials
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Embodiment 1
[0016] (1), add di-n-butylamine, phosgene and 20% sodium hydroxide solution in a molar ratio of 2: 1: 2 in a reaction vessel;
[0017] (2), the acylation reaction temperature is 60°C, and the acylation reaction time is 5 hours, and the crude product of tetrabutylurea is obtained;
[0018] (3) After the crude tetrabutylurea was left to stand for 30 minutes, the mother liquid water in the lower layer was separated, and the crude tetrabutylurea was distilled at a vacuum degree of -0.092MPa and a kettle temperature of 200°C to obtain the final product of tetrabutylurea .
Embodiment 2
[0020] (1), add di-n-butylamine, phosgene and 20% sodium hydroxide solution in a molar ratio of 2: 1.05: 2.1 in the reaction vessel;
[0021] (2), the acylation reaction temperature is 70°C, and the acylation reaction time is 6 hours, and the crude product of tetrabutylurea is obtained;
[0022] (3) After the crude tetrabutylurea was left to stand for 30 minutes, the mother liquid water in the lower layer was separated, and the separated crude tetrabutylurea was distilled at a vacuum degree of -0.094MPa and a kettle temperature of 210°C to obtain the final product of tetrabutylurea .
Embodiment 3
[0024] (1), add di-n-butylamine, phosgene and 20% sodium hydroxide solution in a molar ratio of 2: 1.05: 2.1 in the reaction vessel;
[0025] (2), the acylation reaction temperature is 80°C, and the acylation reaction time is 8 hours, and the crude product of tetrabutylurea is obtained;
[0026] (3) After the crude tetrabutylurea was left to stand for 30 minutes, the mother liquid water in the lower layer was separated, and the separated crude tetrabutylurea was distilled at a vacuum degree of -0.096MPa and a kettle temperature of 220°C to obtain the final product of tetrabutylurea .
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