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 into 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.
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申请公布号 |
WO9728100(A1) |
申请公布日期 |
1997.08.07 |
申请号 |
WO1997JP00108 |
申请日期 |
1997.01.21 |
申请人 |
TOYO ENGINEERING CORPORATION;FUJII, HIDETSUGU;MORIKAWA, HARUYUKI |
发明人 |
FUJII, HIDETSUGU;MORIKAWA, HARUYUKI |
分类号 |
B01J2/02;B01J2/04;B01J2/16;C05C9/00;C05C9/02;C07C273/02;C07C273/14;C07C275/00;(IPC1-7):C05C9/00;B01J2/00 |
主分类号 |
B01J2/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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