Method of producing 1,2,4-triazole

Details Method of producing 1,2,4-triazole Method of producing 1,2,4-triazole

1999-05-06

1999-12-14

Morris, Patricia L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

5482622, C07D24908

Patent

active

060020156

ABSTRACT:
A method of producing 1,2,4-triazole, comprising a step of subjecting a ketazine, water and formamide to a cyclization reaction. The ketazine and water are added simultaneously to formamide kept at a cyclization temperature. Then, ketone by-produced during the cyclization reaction is distilled off while maintaining the reaction mixture at a cyclization temperature to complete the cyclization reaction, thereby obtaining 1,2,4-triazole. The use of the ketazine in place of hydrazine makes the energy-consuming hydrolysis step in the conventional hydrazine production unnecessary. Therefore, the method of the invention is advantageous over the known methods in energy consumption and production cost.

REFERENCES:
patent: 4267347 (1981-05-01), Petree et al.
patent: 4390704 (1983-06-01), Beer
patent: 4490539 (1984-12-01), Besan

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