Aminoguanidine bicarbonate with particular properties and method for making same
US6884912B1 · kind B1 · utility
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13Claims
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Key dates
| Filing date | Jun 8, 2000 |
| Grant date | Apr 26, 2005 |
| Priority date | — |
| Expiry date | Dec 24, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C277/02
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention concerns a method for making aminoguanidine bicarbonate from an aqueous solution of cyanamide and an aqueous solution of hydrazine in the presence of CO2. The invention is characterised in that it consists in proceeding with an amount of cyamide slightly higher than the stoichiometric quantity. The invention also concerns quasi-spherical agglomerates of aminoguanidine bicarbonate crystals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.