Method for preparing sodium nitrotetrazolate using cation exchange resin
US10947204B1 · kind B1 · utility
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4References
16Claims
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Key dates
| Filing date | Oct 17, 2019 |
| Grant date | Mar 16, 2021 |
| Priority date | — |
| Expiry date | Oct 17, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J39/05
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention is directed to a method for preparing 5-nitrotetrazolate using a strongly acidic ionic cation exchange resin that has improve yields over prior art methods. The methods disclosed herein can be used either in a batch process or continuous flow reactor. In one exemplary process, starting material sodium 5-aminotetrazolate in solution is added into a reaction vessel containing a strongly acidic ionic cation exchange resin to facilitate production of 5-nitrotetrazolate. Multiple reactors containing resins may be connected in series to improve 5-nitrotetrazolate yields and purity levels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.