PRODUCTION OF NITROGUANIDINE FROM GUANIDINE NITRATE THROUGH THE ACTION OF AQUEOUS SULFURIC ACID

摘要

The disclosure describes a process for the continuous production of nitroguanidine from quanidine nitrate by the action of aqueous sulfuric acid and possibly nitric acid reusing the concentrated sulfuric acid recovered from the previous step whereby the conversion is carried out using 2.5 to 3.5 moles per mole of guanidine nitrate. The dehydratation is carried out using a 82-85% sulfuric acid at a temperature of 40-80.degree.C, preferably 40-60.degree.C in a period of 1 to 3 hours and subsequently the sulfuric acid is diluted to 25-35% by adding water or washacid of 0-5.degree.C from a previous operation and the diluted 25-35% sulfuric acid recovered after separation of the precipitated nitroguanidine is concentrated for reuse. This process is more economical and the reaction time is considerably reduced for the same yield.