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    • 4. 发明授权
    • Process for the preparation of 3-amino-1,2,4-triazole
    • 3-氨基-1,2,4-三唑的制备方法
    • US4628103A
    • 1986-12-09
    • US746287
    • 1985-06-19
    • Michel Alicot
    • Michel Alicot
    • C07D249/14
    • C07D249/14
    • A process for preparing 3-amino-1,2,4-triazole by reacting hydrazine hydrate, cyanamide and formic acid to form aminoguanidine formate and cyclizing the formate, wherein hydrazine hydrate and formic acid are simultaneously added to the cyanamide at 0.degree. to 10.degree. C. and a pH of 6 to 7, maintaining the mixture at 60.degree. to 100.degree. C. and a pH of 7 to 8 to form aminoguanidine formate, evaporating the aminoguanidine formate solution at 30.degree. to 60.degree. C. to a solids content of 100 to 700 g/L, filtering and washing the formate to a dicyandiamide content below 0.25%, and heating the formate at 110.degree. to 200.degree. C. to obtain the aminotriazole.
    • 通过使水合肼,氰胺和甲酸反应形成氨基胍甲酸盐并使甲酸环化制备3-氨基-1,2,4-三唑的方法,其中将水合肼和甲酸同时加入到氰胺中,在0℃至10℃ ℃,pH为6〜7,将混合物保持在60〜100℃,pH值为7〜8,形成氨基胍甲酸酯,将氨基胍甲酸酯溶液在30〜60℃下蒸发至固体 含量为100〜700g / L,过滤并洗涤甲酸盐至双氰胺含量低于0.25%,并将甲酸盐在110℃加热至200℃,得到氨基三唑。