Patent ID: 8350050
Filing Date: 2013-01-08
Classification: C07D

Abstract:
1. A method for producing bis-(1(2)H-tetrazol-5-yl)amine ammonium salt comprising the steps of: heating to 50 to 120° C. a solution mixture in which an azide salt in a necessary amount and a dicyanamide salt in an amount corresponding to 1 to 80 wt% of a necessary amount are added to a solvent, adding an acid in an amount of 1.54 to 2.22 chemical equivalents of the dicyanamide salt in the solution mixture to carry out a reaction at 50 to 120° C, adding an acid and a dicyanamide salt solution in which remaining dicyanamide salt is dissolved in a solvent to promote the reaction, heat-treating at 75° C. or greater the obtained metal salt compound, adding a solution of a second acid to form at least one of bis-(1(2)H-tetrazol-5-yl)amine anhydrate and monohydrate, and adding an amine to the obtained at least one of bis-(1(2)H-tetrazol-5-yl)amine anhydrate and monohydrate to convert the at least one of bis-(1(2)H-tetrazol-5-yl)amine anhydrate and monohydrate into bis-(1(2)H-tetrazol- wherein the bis-(1(2)H-tetrazol-5-yl)amine ammonium salt has a purity of 99.0 wt% or greater on a weight basis and not showing a peak accounting for 0.1 wt% or greater on a weight basis within a relative retention time starting at 2.17 and ending at 2.24 assuming that a retention time to a main peak is 1 as determined according to an area percentage obtained by HPLC analysis, provided that HPLC analysis conditions include: