Hydrolysis of Diammonium Imidobis(sulfate) and Ammonium Amidosulfate Mixture at Elevated Temperature

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Other Title
  • イミドビス(硫酸)ニアンモニウムとアミド硫酸アンモニウム混合物の高温加水分解

Description

Hydrolyses of coexisting NH(SO3NH4)2 and NH4SO3NH2 has been studied in the presence of guanidinium sulfate and (NH4)2SO4 from 100 to 160°C, at which temperature range no decomposition of guanidinium ion was observed. It was confirmed that hydrolysis of the NH2S03- in an aqueous solution was much slower than that of NH(S03-)2- in the same solution and that the former hydrolysis proceeds through the reaction between NH2S03- and H30+ formed by the preceding hydrolysis of NH(S03-)2. On the other hand, hydrolysis of the NH2S03- in the presence of a small amount of water was found to be accelerated by the addition of NH(S03NH4)2 and to occur in preference to that of the coexisting NH(S03)2 above 120°C. The reaction path in this case was presumed as follows. An actual reaction mixture(guanidinium ion: 14.4, NH4+: 14.5, SO42-: 30.6, NH(S03-)2: 23.5, NH2S03-: 13.9%) obtained in a guanidine synthesis was hydrolyzed in the presence of a small amount of water on the basis of the above results. It was readily converted into a mixture of guanidinium sulfate, (NH4)2SO4 and H2SO4.

Journal

  • NIPPON KAGAKU KAISHI

    NIPPON KAGAKU KAISHI 1987 (4), 654-659, 1987-04-10

    The Chemical Society of Japan

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