Reaction crystallization of sulfamic acid from urea and fuming sulfuric acid.

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概要

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• Reaction crystallization of sulfamic acid from urea and fuming sulfuric acid was studied in a continuous well-mixed crystallizer. In this work, growth rate and nucleation rate were correlated with retention time. Secondary nucleation obtained from two kinds of agitators was studied briefly on the basis of the collision model. On the other hand, reaction rate was represented by the pseudo-first order of urea concentration in a vessel and the correlation between reaction rate and retention time was also obtained. Because both reaction rate and crystallization rate were correlated with retention time, a new design method without use of correlative equations of supersaturation is proposed and a chart based on retention time is submitted.

• 公益社団法人 化学工学会の論文

著者

• Toyokura Ken

  Department Of Applied Chemistry Waseda University

• UENO JUNJI

  Department of Applied Chemistry, Waseda University

• TAWA KENJI

  Department of Applied Chemistry, Waseda University

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• Reaction crystallization of sulfamic acid from urea and fuming sulfuric acid.

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