Two benzophenone hydrazone has certain application value in industrial production, generally two benzophenone hydrazone with two benzophenone and anhydrous hydrazine prepared in pure ethanol, but anhydrous hydrazine is a very easy explosive combustion products, is not safe, there is a certain danger. The synthesis of anhydrous hydrazine is obtained by the dehydration of anhydrous hydrazine at a concentration of about eighty percent, and the high purity anhydrous hydrazine is obtained by refluxing in potassium hydroxide. The process requires a large amount of potassium hydroxide, while the preparation of the environment is also highly dangerous, so this method is gradually eliminated, not suitable for industrial applications.
 

   So the technology is improved from different solvent oil by using ethylene glycol as solvent, such as glycerol, isopropanol and ethylene glycol, found using isopropyl alcohol as the solvent, the reaction temperature is moderate, but the yield is low, the viscosity of glycerol is too large, difficult to filter, the two generation of benzophenone hydrazone dry and difficult to choose. The concentration of eighty percent hydrazine hydrate and two benzyl alcohol reaction two benzophenone hydrazone, synthesis rate as high as ninety-five percent, the method of short time, and the risk is very low, can carry out mass production.