Process for the manufacture of nitroguanidine using guanidine nitrate under the action of an aqueous sulfuric acid.

摘要

P process by which the reaction is carried out with the implementation of 2,5 to 3,5 mole of sulfuric acid per mole of guanidine nitrate with the impurity-depleted acid from each of the working cycle of the preceding / p & & p & process characterized in that the dehydration is carried out with sulphuric acid at 82 - 85% at a temperature of 40 to 80°C. for one to three hours, it is subsequently diluted sulphuric acid recovered with the washing water at 0 to 5°C. from the preceding cycle, and after separation of nitroguanidine precipitated, it recovers the acid diluted to 25 - 35% for a new cycle of the reaction. / p & & p & method applicable to a continuous production cost and high efficiency. / p