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    • 3. 发明授权
    • Process for the preparation of sulfamic acid
    • 制备氨基磺酸的方法
    • US4386060A
    • 1983-05-31
    • US343831
    • 1982-01-29
    • Philippe LeclercqJacques Luternauer
    • Philippe LeclercqJacques Luternauer
    • C01B21/096C01B17/00
    • C01B21/096
    • Processes for the production of sulfamic acid by the reaction of urea, sulfuric anhydride, and sulfuric acid in (1) a two-stage process wherein the sulfuric anhydride used in the first stage at a temperature less than 50.degree. C. is dissolved in a halogenated fluorocarbon or a mixture of halogenated fluorocarbons having a boiling point of from 0.degree. to 50.degree. C. or (2) in a one-stage process at 60.degree. to 100.degree. C. with the sulfuric anhydride dissolved in a halogenated fluorocarbon or a mixture of halogenated fluorocarbons having a boiling point below 100.degree. C. at atmospheric pressure, the halogenated fluorocarbon serving to remove the heat generated by the exothermic formation of the sulfamic acid from the original reactants.
    • 在(1)两阶段方法中通过尿素,硫酸酐和硫酸的反应生产氨基磺酸的方法,其中将第一阶段在低于50℃的温度下使用的硫酸酐溶于 卤代碳氟化合物或沸点为0〜50℃的卤代碳氟化合物的混合物,或者(2)在60-100℃的一步法中与硫酸酐溶解在卤代碳氟化合物或 在大气压下沸点低于100℃的卤代碳氟化合物的混合物,用于去除由原始反应物引起的氨基磺酸的放热形成产生的热量的卤代碳氟化合物。