塩化シアンの合成

概要

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In order to carry out a series of stddies on the preparation of cyanuric chloride, analytical methods for determining the contents of cyanogen chloride have been investigated, and cyanogen chloride has been prepared by various methods.　The results obtained are summarized as follows :　(1) Among the methods investigated for determining CNCl, the potentiometric titration method with AgNO_3 using mercury as an indicator electrode, gave the most accurate result.　(2) In the action of Cl_2 on NaCN according to NaCN + Cl_2 -> CNCl + NaCl, paracyahogen is formed:　xCNCl + xNaCN -> xNaCl + (CN)x　To avoid this reaction, the authors added ZnSO_4 in the proportion of 1 mole to 3 moles of alkli cyanide, or added HCl to reduce the alkalinity of the solution followed by the hydrolysis of alkali cyanide, and obtained excellent results.　(3) CNCl was prepared by electrolysis, using a solution of HCN and HCl, as an anodic liquid, in a glass vessel with iron cathode.　The current was 2･5 - 10A per dm^2 of anode area ; a solution of NaCN, containg HCl, NaCl or CaCl_2, was used as a cathodic liquid.　(4) In the action of Cl_2 on HCN according to Cl_2 + HCN -> HCl + CNCl, white crystal is formed when the concentration of HCN exceeds 30%.　To this crystalline compound, the authors gave the following
山形大学の論文
1958-03-20