The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 14, 1999
Filed:
May. 06, 1999
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
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.