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Process for the production of aminoguanidine bica...

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Aminoguanidine bicarbonate with the specific characteristics(cas2582-30-1)​

The invention relates to production of aminoguanidine bicarbonate(cas2582-30-1) . The invention also relates to specific characteristics of aminoguanidine bicarbonate(cas2582-30-1) .

By cyanamide aqueous reaction with hydrazine, then add the CO2 to produce aminoguanidine bicarbonate method is known. Due to cyanamide contact with hydrazine in alkaline medium can also lead to cyanamide dimer effect, so you need to use a lot of cyanamide to obtain appropriate yield of aminoguanidine bicarbonate(cas2582-30-1) .

Therefore, patent DD 689191 tells the story of cyanamide with 100% excess (namely cyanamide/hydrazine mole ratio = 2/1), reaction after 60 hours, with 80% of the yield of AGB (relative to the amount of hydrazine). When the concentrated solution of cyanamide of hydrazine and 100% excess ammonia nitrile (DD730331) 27 hours after reaction, the yield of aminoguanidine bicarbonate(cas2582-30-1)  can reach about 90%.

Because cyanamide is very expensive products, so a lot of research is trying to reduce the excessive consumption.In particular, patent SU, 981, 314 public cyanamide/hydrazine mole ratio between 1.25 and 1.8. Which when the molar ratio of cyanamide/hydrazine was 1.8, the yield of aminoguanidine bicarbonate(cas2582-30-1)  (relative to the hydrazine) was 95%. It also tells when the mole ratio of 1.5 and 1.25 yield down to 90% and 90% respectively.

Other authors also noticed the same trend. So, there is record shows that when the molar ratio of acrylic/hydrazine ammonia from 1.2 to 1 (009) DD249 yield about 12% lower.

The field of comprehensive literature have encouraged the field technicians with excessive cyanamide to obtain a certain yield of aminoguanidine bicarbonate(cas2582-30-1) .

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