| 摘要 |
PURPOSE:To manufacture m-hydroxybenzyl alcohol in a high yield with superior current efficiency by electrolytically reducing an acidic soln. of m-hudroxybenzoic acid or an ester thereof with a cathode of a metal having high hydrogen overvoltage. CONSTITUTION:An electrolytic cell provided with a diaphragm of asbestos or the like is filled with an electrolytic soln. prepd. by dissolving m-hydroxybenzoic acid or an ester thereof in water or an org. solvent such as methanol or ethanol and adjusting the resulting soln. to <=4pH. Electrolytic reduction is carried out at 0.1-10A/dm<2> current density with a cathode of a metal having high hydrogen overvoltage such as Zn, Pb, Cd or Hg and an anode of a conventional electrode material to manufacture m-hydroxybenzyl ancohol on the cathode.
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