L. Haibo
2010
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Journal
Chemical Industry and Engineering Progress
Abstract
Biurea was successfully synthesized from ketazine,urea and water by a one-step process. The structure and physical properties of the produced biurea was confirmed by IR spectrometry,TG-DTA and DSC. The reaction conditions were investigated including the ratio of ketazine to urea,the urea concentration,reaction time and the recycling of the mother liquor. The prepared biurea was used to the synthesis of azo-diformamide,and the obtained product can achieve the excellent product quality as stated by HG/T 2097—2008 standard.