Patent ID: 6570022
Filing Date: 2003-05-27
Classification: C07D

Abstract:
A process of preparing of bis-(1(2)H-tetrazol-5-yl)-amine monohydrate comprising:combining a dicyanamide salt, an azide salt and water to form a first reaction mixture; adding a solution of a first acid characterized as having a pKa of less than about 2 to said first reaction mixture over a period of time wherein a controlled reaction rate is provided so as to gradually form hydrazoic acid without loss of significant quantities of hydrazoic acid from the solution while heating the first reaction mixture at temperatures greater than about 65Â° C.; heating the resultant reaction mixture at temperatures greater than about 65Â° C. for a period of time sufficient to substantially completely form a reaction product; treating the reaction product with a solution of a second acid to form a product of bis-(1(2)H-tetrazol-5-yl)-amine monohydrate; and, recovering the bis-(1(2)H-tetrazol-5-yl)-amine monohydrate.