发明名称 PROCESS FOR PREPARING GRANULAR UREA
摘要 The present invention provides a process for preparing granular urea, which solves a problem for removing a moisture in a prilling tower method and a problem for concentrating diluted formaldehyde in granulation by a fluidized, spouted bed method when urea is granulated in the presence of formaldehyde. That is, the present invention provides a process for preparing granular urea from liquid drops or sprayed drops of a urea solution, wherein the urea solution is divided in to two portions of a urea solution A and a urea solution B, and a urea solution prepared by mixing an aqueous formaldehyde solution with the urea solution A, concentrating the above mixed solution and then mixing it with the urea solution B is used.
申请公布号 CA2215596(C) 申请公布日期 2001.10.16
申请号 CA19972215596 申请日期 1997.01.21
申请人 TOYO ENGINEERING CORPORATION 发明人 MORIKAWA, HARUYUKI;FUJII, HIDETSUGU
分类号 B01J2/02;B01J2/04;B01J2/16;C05C9/00;C05C9/02;C07C273/02;C07C273/14;C07C275/00;(IPC1-7):C05C9/00 主分类号 B01J2/02
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