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    • 4. 发明授权
    • 뷰렛 및 시아누르산의 제조 방법 및 그 제조 장치
    • 生物素和氰尿酸的制备方法及其制备方法
    • KR100798109B1
    • 2008-01-28
    • KR1020060076212
    • 2006-08-11
    • 동진홀딩스 주식회사
    • 이준혁신민승이훈
    • C07C275/62C07C275/04
    • C07D251/32B01D9/0013B01D9/004B01D9/0059B01J2219/00006B01J2219/0004C07C275/64
    • A method for preparing biuret, a method for preparing cyanuric acid by using the prepared biuret, an apparatus for preparing biuret, and an apparatus for preparing cyanuric acid are provided to improve purity, to lower cost and to simplify the process. Biuret is prepared by melting urea; heating the molten urea for pyrolysis; adding water the product obtained by the pyrolysis to cool it, precipitating crystal, and filtering the crystal to obtain crude biuret crystal; dissolving the crude biuret crystal with an alkali aqueous solution; cooling the obtained solution to precipitate biuret crystal; and filtering and washing the obtained biuret crystal. Preferably the melting temperature is 130-160 deg.C, the heating temperature is 130-200 deg.C, and the cooling temperature is 5-40 deg.C.
    • 制备缩二脲的方法,使用制备的缩二脲制备氰尿酸的方法,制备缩二脲的装置和制备氰尿酸的装置,以提高纯度,降低成本和简化方法。 缩二脲通过溶解尿素制备; 加热熔融的尿素进行热解; 加水通过热解获得的产物冷却,沉淀晶体,过滤晶体得到粗缩二脲晶体; 用碱性水溶液溶解粗制缩二脲晶体; 冷却所得溶液沉淀缩二脲晶体; 并过滤并洗涤所获得的缩二脲晶体。 熔点温度优选为130-160℃,加热温度为130-200℃,冷却温度为5-40℃。