1. A process for the preparation of 3,4 dihydroxybenzaldehyde from p hydroxybenaldehyde, bromine and potassium hydroxide was studied, which comprises the steps of bromation and hydrolysis.
   研究了以对羟基苯甲醛、溴为主要原料,经溴代、水解制备3,4二羟基苯甲醛的方法。

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