发明名称 |
Method for producing urea pellets |
摘要 |
A method for producing urea pellets having a narrow range of grain sizes and a sphericity >75% and a defined residual moisture ≦̸0.5% is provided. The method provides urea pellets having the properties required which meet the requirements of the automotive industry for use thereof in reducing emissions from diesel engines. The method includes spraying a urea-containing liquid having a temperature between ambient temperature and above the melting point of the urea into the high particle density region of the spray zone of a near circular gas, material flow of a spouted bed apparatus and onto the particle surface of the material, which is dried and granulated in the gas flow at a temperature of not more than 130° C. at a controlled heat and mass transfer rate while being separated.
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申请公布号 |
US7838080(B2) |
申请公布日期 |
2010.11.23 |
申请号 |
US20060063337 |
申请日期 |
2006.08.01 |
申请人 |
GLATT INGENIEURTECHNIK GMBH |
发明人 |
RUMPLER KARLHEINZ;WAND BERNHARD;JACOB MICHAEL;BOBER REINHARD;NOWAK REINHARD |
分类号 |
B01J31/02;B05C3/00;C07C273/02 |
主分类号 |
B01J31/02 |
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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