Method for obtaining solutions of OTA in a concentrated sulfuric acid medium; said solutions; and method for preparing ONTA
US9676733B2 · kind B2 · utility
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21Claims
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Key dates
| Filing date | Apr 4, 2014 |
| Grant date | Jun 13, 2017 |
| Priority date | — |
| Expiry date | Apr 4, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D249/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for obtaining solutions that contain 1,2,4-triazole-5-one (OTA) in concentrated sulphuric acid, includes using 3-amino-1,2,4-triazole (ATA) as a precursor of OTA. There is also provided a method for preparing 3-nitro-1,2,4-triazole-5-one (4) (ONTA) from the solutions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.