C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 277/02 (2006.01) C07C 279/02 (2006.01)
Patent
CA 2379334
The invention concerns a method for making aminoguanidine bicarbonate from an aqueous solution of cyanamide and an aqueous solution of hydrazine hydrate in the presence of CO2. The invention is characterised in that it consists in proceeding with an amount of cyanide slightly higher than the stoichiometric quantity. The invention also concerns quasi-spherical agglomerates of aminoguanidine bicarbonate crystals.
La présente invention concerne un procédé de fabrication de bicarbonate d'aminoguanidine à partir d'une solution aqueuse de cyanamide et d'une solution aqueuse d'hydrate d'hydrazine en présence de CO2 caractérisé en ce que l'on opère avec un léger défaut en cyanamide par rapport à la stoechiométrie. Elle a également pour objet des agglomérats quasi sphériques de cristaux de bicarbonate d'aminoguanidine.
Bossoutrot Jean-Michel
Bourdauducq Paul
Atofina
Robic
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