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Process for the production of aminoguanidine bica...

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High-purity aminoguanidine bicarbonate(cas2582-30-1) are prepared by useing the methods

The invention relates to a method for preparing high-purity aminoguanidine bicarbonate(cas2582-30-1). The technological process comprises the steps that hydrazine hydrate and water are mixed firstly; hydrogen cyanamide is added after the temperature rises to 66-80 DEG C; a mixed solution is heated continuously to 80 DEG C; then heating is stopped, so that the temperature of the solution drops naturally to 75-77 DEG C; heat preservation is conducted for 4 hours; then ammonium bicarbonate is added, carbon dioxide gas is introduced at the same time, and heat preservation is conducted for 4 hours; and suction filtration, separation, ethanol rinsing and drying are performed to obtain the high-purity aminoguanidine bicarbonate(cas2582-30-1).

 According to the method, cyanamide, the hydrazine hydrate and the aminoguanidine bicarbonate(cas2582-30-1) serve as raw materials to produce the aminoguanidine bicarbonate, and the carbon dioxide gas is introduced into the mother liquid for adjusting the pH value of the mother liquid during the process for producing the aminoguanidine bicarbonate(cas2582-30-1)simultaneously, so that the product purity is improved. The product purity of the aminoguanidine bicarbonate produced through the method ranges from 98.5% to 99%.


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