Process for the synthesis of 4-amino-4H-1,2,4-triazole
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United States of America Patent
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May 16, 2006
Grant Date -
Jul 28, 2005
app pub date -
Jan 27, 2004
filing date -
Jan 27, 2004
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Abstract
An improved process for synthesizing 4-amino-1,2,4-triazole. Hydrazine hydrate solution is mixed into ethyl formate, ethanol, and an acidic ion exchange resin in a condenser. The solution is held at 75 degrees Celsius until no more liquid exits the condenser. The solution is then heated to between 130 and 133 degrees Celsius and kept at this temperature long enough to remove water and ethanol and to complete the synthesis. The solution is then cooled to 60 degrees Celsius and filtered to remove the ion-exchange resin. The filtered liquid is then cooled to ambient temperature.
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