氰尿酸的合成

Synthesis of Cyanuric Acid

用固相法和液相法，将尿素在高温裂解均制得了氰尿酸．本文在讨论液相法合成氰尿酸时报道了尿素在几种不同溶剂─—己二腈，十二烷基苯，硅油ＤＣ－７０５，硅油２１０－５０中裂解的实验结果．提出硅油２１０－５０是一种较理想的，新型的廉价溶剂，它完全可以代替文献已报道的各种溶剂．将尿素加ＮＨ４Ｃｌ，在硅油２１０－５０中裂解，收率为９３％，纯度达９９％．

yanuric acid is prepared by pyrolysis of urea in solid phase or liquid phase. Experimental results of pyrolyzing urea with several solvents(adipic dinitrile, dodecyl benzene, silicone oil-705, silicone oil-210-50) in liquid phase are reported and discussed. A new ideal and cheap solvent, silicone oil-210-50 is set up firstly, which can substitute fully those sovents reported by literatures. When urea is pyrolyzed added NH4Cl in silicone oil-210-50, yield of cyanuric acid is 93% and the purity is 99%.