[EN] METHOD FOR PREPARING HYDRAZODICARBONAMIDE USING BIURET AS STARTING MATERIAL<br/>[FR] PROCEDE DE PREPARATION D'HYDRAZODICARBONAMIDE AVEC DU BIURET COMME MATIERE PREMIERE
申请人:J & J CHEMICAL CO LTD
公开号:WO2003106400A1
公开(公告)日:2003-12-24
The method for preparing hydrazodicarbonamide(HDCA) using biuret as a starting material is disclosed. The method comprises the steps of; obtaining metal monohalobiuret salt by reacting a biuret with a metal hypohalogen compound, or by reacting the biuret with a halogenating agent and a base; and reacting the obtained metal monohalobiuret salt with ammonia, wherein the hydrazodicarbonamide is produced in the presence of a catalyst including bromine or iodine atom and generating bromine or iodine ion during the reaction.
A method for synthesizing hydrazodicarbonamide (HDCA) by a reaction of monohalobiuret metal salt having the formula 1 or 2, which is derived from biuret, and ammonia, wherein M is a metal and X is a halogen. The monohalobiuret metal salt is inexpensive and easy to synthesize and thus a great yield of HDCA can be obtained from the monohalobiuret metal salt at low cost.