| 摘要 |
1,269,543. Preparing peroxide electrolytically. KONINKLIJKE INDUSTRIEELE MAATSCHAPPIJ NOURY & VAN DER LANDE N.V. Oct. 9, 1969 [Oct.14, 1968], No. 49713/69. Heading C7B. A peroxidic compound, e.g. hydrogen peroxide or sodium perborate, is prepared by electrochemical reduction of oxygen contained in an electrolyte which is passed through a porous cathode, e.g. of amalgamated metal such as Cu, Ni, graphite and/or active carbon. Preferably the electrolyte is an aqueous solution, e.g. of H 2 SO 4 , NaCl, KOH or Na 2 CO 3 and borax, saturated with oxygen at a pressure above atmospheric. An activator, e.g. nitrobenzene or PTFE, may be impregnated into the cathode. The anode may be of Ni, graphite or Pt. A porous glass or asbestos fibre diaphragm may be used. Benzoyl peroxide is precipitated from a catholyte e.g. of NaCl solution containing benzoyl chloride. |
