Continuous preparation process of 3, 4-bis (4 '-aminofurazan-3'-yl) furoxan

The invention provides a preparation method of 3, 4-difluorobenzene. The invention relates to a continuous preparation process of 3, 4-bis (4 '-amino furazan-3'-yl) furazan, which adopts a continuous reaction system to prepare 3, 4-bis (4 '-amino furazan-3'-yl) furazan, and comprises the following steps: firstly, preparing 4-amino-N-hydroxy-1, 2, 5-oxadiazole-3-hydroxyamide by taking malononitrile as a raw material, and then preparing 4-amino-N-hydroxy-1, 2, 5-oxadiazole-3-hydroxyamide by taking the prepared 4-amino-N-hydroxy-1, 2, 5-oxadiazole-3-hydroxyamide as a raw material. 3, 4-bis (4 '-amino furazan-3'-yl) oxidized furazan is prepared from 3, 4-bis (4 '-amino furazan-3'-yl) furazan and 2, 3, 5-oxadiazole-3-hydroxyamide as raw materials, and the process has the advantages that the reaction mass and heat transfer efficiency is improved, the reaction period is shortened, the reaction temperature is optimized, the energy consumption in the preparation process is reduced, and the product preparation cost is