Method By single factor tests,the effect factors in urea adduction process including ratio of urea and ETOH, adduction temperature and time,and refluxing time were discussed.

• 方法通过单一因素实验对尿素用量、溶剂(乙醇)用量、回流时间、尿素包合冷析时的温度及尿素包合作用静置时间几个工艺参数进行研究。