Method for preparing spherical 3-nitro-1, 2, 4-triazole-5-ketone crystal through micro-channel rapid cooling crystallization

The invention provides a method for preparing a spherical 3-nitro-1, 2, 4-triazole-5-ketone crystal through micro-channel rapid cooling crystallization, and relates to the technical field of energetic crystal materials. The preparation method comprises the following steps: continuously introducing a saturated solution of 3-nitro-1, 2, 4-triazole-5-ketone into a labyrinth reactor for cooling crystallization to obtain an explosive suspension; the temperature of the saturated solution of the 3-nitro-1, 2, 4-triazole-5-ketone is 77-82 DEG C, and the temperature of the cooling crystallization is-22 DEG C to-17 DEG C; and carrying out solid-liquid separation, washing and drying on the explosive suspension to obtain the spherical 3-nitro-1, 2, 4-triazole-5-ketone crystal. According to the micro-channel rapid cooling crystallization, a micro-reaction technology is introduced into a cooling crystallization technology, and the spherical 3-nitro-1, 2, 4-triazole-5-ketone crystal prepared through the method is high in sp