【摘要】 报导了负压法制备缩二脲。实验表明：在压力０．０２５ＭＰａ，温度１７５℃，时间１５ｈ条件下，产率由常压的３８％提高到５０９％更多还原

【Abstract】 The preparation of biuret by negative pressure method was described. The test showed that the yield of biuret can reach 50.9% under the reaction conditions of 0.025 MPa pressure,175 temperature and 1.5 hours compared with the yield(38%) under the normal pressure.更多还原