球形DDNP制备技术研究

Manufacturing Technology for Spherical DDNP

采用硫化钠直接中和还原苦味酸,采用盐酸单一加料法,通过自主研制的F-1晶型控制剂,制得高品质球形二硝基重氮酚(DDNP),平均粒径大于350μm,其100目筛上物达到95%以上,散装密度在0.70～0.90g·cm-3范围可控,耐压性大于40MPa,流散性好,生产过程中没有细小结晶和爆炸性粉尘,产品得率比传统的DDNP制备工艺提高2%～3%,生产过程不需漂洗细小结晶工序,同时采用部分母液循环的办法,单位产品的工艺用水量为30～35kg/kg(DDNP),目前已实现工业化生产。

Spherical diazodinitrophenol（DDNP） was prepared from the reaction of pierie acid,sodium sulfide,hydrochloric acid and self-developed crystal shape controller F-1. The product with hulk density of 0.70 - 0.90 g - era - 3 has a good fluidity, and its average partiele size is more than 350 μm. The pressure test of the product can be carried out under condition of more than 40 MPa. In the present manufacturing process, no fine crystals or explosion dusts are produced, and thus it is no need to wash away the fine crystals. The yield of the product prepared from the manufacturing technology is increased by 2% -3% higher than that from the traditional method, and the water need for each unit product is 30 -35 kg/kg（DDNP） by circulation use of the mother liquid. Industrial production of spherical DDNP can be realized.