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    Method for Recycling Urea in Urea Adduct Process
    4.
    发明申请
    Method for Recycling Urea in Urea Adduct Process 审中-公开

    公开(公告)号：US20170240507A1

    公开(公告)日：2017-08-24

    申请号：US15519552

    申请日：2015-10-12

    申请人： Zhejiang Medicine Co., Ltd. Xinchang Pharmaceutical Factory

    发明人： Yongjian Peng ,  Xinde Xu ,  Jinping Ma ,  Yanwen Zhang ,  Bin Shao

    IPC分类号： C07C273/16 ,  C07C7/14 ,  C07C7/152 ,  C07C51/43 ,  C07C51/487

    CPC分类号： C07C273/16 ,  C07C7/14 ,  C07C7/152 ,  C07C51/43 ,  C07C51/487 ,  C07C57/12 ,  C11C3/00 ,  Y02P20/582

    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.

    Process for the separation of contaminant or mixture of contaminants from a CH4-comprising gaseous feed stream
    10.
    发明授权
    Process for the separation of contaminant or mixture of contaminants from a CH4-comprising gaseous feed stream 有权
    用于从含CH4的气态进料流中分离污染物或污染物混合物的方法

    公开(公告)号：US08857212B2

    公开(公告)日：2014-10-14

    申请号：US13881228

    申请日：2011-10-10

    申请人： Martin Van Sint Annaland ,  Martin Jan Tuinier

    发明人： Martin Van Sint Annaland ,  Martin Jan Tuinier

    IPC分类号： B01D53/00 ,  C07C7/14

    CPC分类号： C07C7/14 ,  B01D53/002 ,  B01D2256/24 ,  B01D2257/504 ,  Y02E50/346 ,  Y10S62/928

    摘要： The invention provides a process for the separation of a contaminant or mixture of contaminants from a CH4-comprising gaseous feed stream, comprising the subsequent steps of: a) passing a CH4-comprising gaseous feed stream comprising the contaminant or the mixture of contaminants into and through a cold porous body having a temperature below the sublimation temperature of the contaminant or the mixture of contaminants and contacting the CH4-comprising gaseous feed stream at elevated pressure with the surface of the cold porous body to obtain a porous body comprising solid contaminant or mixture of contaminants and a contaminant-depleted product gas; and b) reducing the pressure to obtain fluid contaminant or mixture of contaminants and a cold porous body. c) removing the fluid contaminant or mixture of contaminants, wherein the contaminant is selected from CO2, hydrogen sulphide, mercaptans, siloxanes and carbonyl sulphide, or a mixture thereof.

    摘要翻译： 本发明提供了一种用于从含CH4的气态进料流中分离污染物或污染物混合物的方法，其包括以下步骤：a）将包含污染物或污染物混合物的含CH 4的气态进料流 通过具有低于污染物的升华温度或污染物混合物的温度的冷多孔体，并将其与提高的压力下的含CH 4的气体进料流与冷多孔体的表面接触，以获得包含固体污染物或混合物的多孔体 的污染物和污染物耗尽的产品气体; 和b）降低压力以获得流体污染物或污染物混合物和冷多孔体。 c）去除流体污染物或污染物混合物，其中污染物选自CO 2，硫化氢，硫醇，硅氧烷和硫化羰，或其混合物。