Method for synthesizing melamine cyanurate salt
A technology of melamine cyanurate salt and melamine, which is applied in organic chemistry and other fields, and can solve the problems of fine particle size of the product, large amount of water consumption, and high cost of raw materials
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Embodiment 1
[0014] First weigh 48 grams of urea, 28.56 grams of melamine, dispersant NH 4 NO 3 6 grams, put into a mixer and mix uniformly to obtain a mixture. Preheat a 1000mL four-neck bottle equipped with an electric heating mantle, agitator, thermometer, condenser, and ammonia gas absorption system to 270°C, add the above-mentioned mixed mixture, start the agitator, and then inject nitrogen gas to take away the generated ammonia Start the above-mentioned ammonia gas absorption system for recovery; when the temperature reaches 200°C, the material becomes viscous, and when the temperature continues to rise to 270°C, the material solidifies and becomes a white powdery intermediate product, and the reaction is maintained for 1 hour since feeding. Then the intermediate product was cooled to below 100°C (≤100°C, the same below), 456 grams of water was added, the temperature was raised to 100°C, and the reaction was maintained at this temperature for 10 hours. Then filter while it is still...
Embodiment 2
[0016] First weigh 48 grams of urea, 30.24 grams of melamine, and 6 grams of dispersant ammonium chloride, put them into a mixer and mix them uniformly to obtain a mixture. Heat a 1000mL four-neck flask equipped with an electric heating mantle, stirrer, thermometer, condenser, and ammonia gas absorption system to 280°C, add the above mixture, start the stirrer, feed nitrogen to take away the generated ammonia gas, and start the The above-mentioned ammonia gas absorption system is recovered. When the temperature reaches 200°C, it becomes viscous, and when the temperature continues to rise to 280°C, the material solidifies and becomes a white powdery intermediate product. After the reaction is maintained for 1 hour, the intermediate product is cooled to below 100°C, and 456 grams of water are added. , then warming up to 100°C, keeping the reaction at this temperature for 10 hours, filtering while hot, washing with 800 grams of boiling water until neutral, and drying the filter c...
Embodiment 3
[0018] First weigh 48 grams of urea, 28.56 grams of melamine, and 6 grams of dispersant ammonium chloride, put them into a mixer and mix them evenly to obtain a mixture. Preheat a 1000mL four-necked bottle equipped with an electric heating mantle, agitator, thermometer, condenser, and ammonia gas recovery system to 290°C, add the above-mentioned mixed mixture, start the agitator, and then inject chlorine gas to take away the generated ammonia Start the above-mentioned ammonia gas absorption system for absorption; when the temperature reaches 200°C, the material becomes viscous, and when the temperature continues to rise to 290°C, the material solidifies and becomes a white powdery intermediate product, which remains for 1 hour after feeding. , lower the temperature of the intermediate product below 100°C (≤100°C, the same below), add 514 grams of water, then raise the temperature to 100°C, and keep the reaction at this temperature for 10 hours. Then filter while hot, wash with...
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