| abstract |
The present invention also provides a method for preparing a high-safety hydroquinone composition, characterized in that it comprises the following steps: 1) aniline, MnO , sulfuric acid are aniline: MnO : the molar ratio of sulfuric acid is 1:1- 5: 2-6 was added to the reaction device, stirred until the reaction was complete, to obtain p-benzoquinone, wherein the charging temperature was 0-15°C, and the reaction temperature was 0-30°C; 2) the prepared p-benzoquinone reaction solution was subjected to Steam distillation, in the collected distillation condensate, add iron powder according to the molar ratio of p-benzoquinone:iron powder as 1:0.5-1.0, and under the condition of 70-100 ℃, stir until the reaction is complete to prepare hydroquinone. The method has the advantages of simple operation, low cost, good repeatability, suitability for industrial production, high yield and high purity. |