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1. 发明授权

US06538157B1 Method for the preparation of urea 失效
标题翻译：制备尿素的方法
公开(公告)号：US06538157B1
公开(公告)日：2003-03-25
申请号：US10030551
申请日：2002-06-12
申请人： Josephus Johannes Petrus Maria Goorden , Jacobus Johannes De Wit
发明人： Josephus Johannes Petrus Maria Goorden , Jacobus Johannes De Wit
IPC分类号： C07C27304
CPC分类号： C07C273/04
摘要： A method for the preparation of urea in a reactor using ammonia and carbon dioxide as starting materials, includes a) bringing the ammonia and carbon dioxide into contact in the reactor under conditions for the formation of carbamate; and b) decomposing the carbamate thus formed to give urea and water. The water formed during step b) is removed from the reaction mixture by a water-selective membrane which is preferably a pervaporation membrane, such as a porous ceramic membrane. Furthermore, a pressure difference is preferably maintained or applied over the selective membrane. The method can in particular be carried out in liquid circulating stream which, in addition to the reactants fed to the circulating stream and the carbamate formed in step a), also contains at least some of the water formed in step b) and also the urea formed in step b), the urea being recovered from the circulating stream and the circulating stream being recycled to the reactor.
摘要翻译：在使用氨和二氧化碳作为原料的反应器中制备尿素的方法包括：a）在形成氨基甲酸酯的条件下使氨和二氧化碳接触反应器; 和b）分解由此形成的氨基甲酸酯以产生尿素和水。在步骤b）中形成的水通过优选为渗透蒸发膜（如多孔陶瓷膜）的水选择性膜从反应混合物中除去。此外，优选地在选择性膜上保持或施加压力差。该方法特别可以在液体循环流中进行，除了进料到循环流中的反应物和步骤a）中形成的氨基甲酸酯之外，还包含至少一些步骤b）中形成的水以及尿素在步骤b）中形成，尿素从循环流中回收，循环流被循环到反应器中。

2. 发明授权

US06485613B1 Batch-continuous countercurrent mass transfer process 失效
标题翻译：批量连续逆流传质过程
公开(公告)号：US06485613B1
公开(公告)日：2002-11-26
申请号：US09530692
申请日：2000-05-04
申请人： Josephus Johannes Petrus Maria Goorden
发明人： Josephus Johannes Petrus Maria Goorden
IPC分类号： B01D314
CPC分类号： B01D53/18 , B01D3/02 , B01D3/14 , B01D3/146 , B01D11/0219 , B01D11/0284 , B01D11/043 , B01D11/0457 , B01D11/0488 , B01D47/12 , Y10S203/11 , Y10S203/13 , Y10S203/17
摘要： Mass transfer process, in which, in at least two contact stages, and at least two liquid or gaseous phases are brought into contact with one another, at least one component being transferred between the phases and the phases moving countercurrently. The flow through at least one of the contact stages is batchwise for one phase and continuous for another phase. The phases flow through contact stages which are formed by trays in a column, which trays are opened periodically so that the phase which flows through the column in a batchwise manner flows to the next tray.
摘要翻译：在至少两个接触阶段和至少两个液相或气相彼此接触的质量传递过程中，在相和相之间转移的至少一个组分逆流运动。通过至少一个接触级的流是间歇式的，用于一相，另一相连续流。这些相通过由塔中的塔板形成的接触阶段，其中塔板周期性地打开，使得以间歇方式流过塔的相流动流到下一个塔盘。

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