Method for preparing sodium nitrotetrazolate using cation exchange resin
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United States of America Patent
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Mar 16, 2021
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Oct 17, 2019
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Oct 17, 2019
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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.
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