【摘要】 研究了以乙二醛与尿素作为原材料,乙醛酸为中间体制备尿囊素的方法,得出最佳的合成条件是:尿素与乙二醛的摩尔比为10.6:1,乙二醛与催化剂的质量比为2.07:1,以浓盐酸作催化剂,反应时间为2.5h,温度为80℃,合成产率30.1％。并对尿囊素进行了性能测试,初步结果显示其保湿性较好。更多还原

【Abstract】 The article is researched on condensation of Allantoin with using glyoxal and carbamide as raw materials, the intermedi-ate as glyoxalic acid.The best condition is gained: with the mole rate of 1:10.6,using the concentrated hydrochloric acid as catalyst, re-acting time of 2.5 hours .reacting temper of 80℃ ,the yield is 30.1% .The performance is also tested, and the result is that its humid preservation is excellent.更多还原