固体消毒剂过氧化尿素湿法合成

通过考察反应物配比、反应温度、反应时间、稳定剂种类及其用量等因素对湿法制备过氧化尿素实验的影响，确定了过氧化尿素合成的最佳条件为：过氧化氢与尿素的物料配比(摩尔比)1.1:1，反应温度30℃以下，以低温为宜，反应时间50 min，稳定剂水杨酸的加入量为尿素质量的0.5%. 该条件比文献报道的低温反应易实施，且合成过程中过氧化氢损失很少. 针对合成过氧化尿素后母液的回收利用，提出了减压蒸馏实现母液过氧化氢循环的闭路新工艺路线，依据测定的50℃过氧化氢-尿素-水体系相平衡数据所绘相图，对新工艺进行了讨论.

Synthesis of Solid Disinfectant Urea Peroxide by Hydro-processes

By means of the study on the effects of molar ratio of hydrogen peroxide to urea, reaction temperature and time, type and quantity of stabilizing agent on preparation of urea peroxide by hydro-processes, the suitable synthesis conditions of urea peroxide have been determined. They are molar ratio of hydrogen peroxide to urea 1.1:1, reaction temperature below 30℃, reaction time 50 min, stabilizing agent salicylic acid and its quantity 0.5% of urea. Carrying out these conditions is easier than those reported in the literature, and the loss of hydrogen peroxide in the preparation process of urea peroxide is also lower. In accordance with the utilization of remaining solution containing hydrogen peroxide after preparing urea peroxide, a new technology, namely vacuum distillation process, is proposed to realize recycling utilization of remaining solution. On the basis of phase diagram analysis of urea-hydrogen-peroxide-water system, the new technology is further discussed.