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2. 发明公开

EP3208257A1 METHOD FOR RECYCLING UREA IN UREA ADDUCT PROCESS 有权
标题翻译：在尿素加入过程中回收尿素的方法
公开(公告)号：EP3208257A1
公开(公告)日：2017-08-23
申请号：EP15850981.0
申请日：2015-10-12
申请人： Zhejiang Medicine Co., Ltd. Xinchang Pharmaceutical Factory
发明人： PENG, Yongjian , XU, Xinde , MA, Jinping , ZHANG, Yanwen , SHAO, Bin
IPC分类号： C07C27/02 , C07C57/12 , C11C3/00
摘要： The present invention discloses a method for recycling urea in the process of separating and purifying unsaturated substances through a urea adduction method. The method comprises the following steps: liposoluble substances containing target unsaturated components are used as raw materials, and subjected to urea adduction, crystallization and filtration to produce a filtrate, from which the specific unsaturated components are obtained; the urea adduct is dissolved in a polar solvent, and after the adducted adducts are layered and released, adding a certain solvent to the urea solution to adjust the polarity, then cooling for crystallization, and recycling the urea. The method can realize complete release of the adducted components and recycling and reuse of urea, and the process is simple, the recovery rate is high, and the adduction effect is not influenced when recycling urea for reuse, and the production cost of the urea adduct is reduced, thus alleviating the adverse impact of urea discharges on the environment.
摘要翻译：本发明公开了一种在尿素加合法分离纯化不饱和物质的过程中回收尿素的方法。该方法包括以下步骤：将含有目标不饱和组分的脂溶性物质作为原料，进行尿素加合，结晶，过滤，制得滤液，得到特定的不饱和组分; 将尿素加合物溶解在极性溶剂中，在加合物加层分离后，向尿素溶液中加入一定溶剂调节极性，然后冷却结晶，再循环尿素。该方法可以实现加合物的完全释放和尿素的回收再利用，工艺简单，回收率高，尿素回用再利用时不影响加合效果，尿素加合物的生产成本因此减轻了尿素排放对环境的不利影响。

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