发明公开
- 专利标题： Process for producing calcium urea-nitrate
- 专利标题（中）： 生产尿素 - 硝酸钙的方法
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申请号： EP88200178.7申请日： 1988-02-03
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公开(公告)号： EP0278562A3公开(公告)日： 1990-03-28
- 发明人: Crispoldi, Antonio , Moriconi, Andrea , Chiappafreddo, Mario
- 申请人： ENICHEM AGRICOLTURA S.p.A. , CCM S.r.l. , TECNOCENTRO S.r.l.
- 申请人地址： Via Ruggero Settimo 55 I-90139 Palermo IT
- 专利权人： ENICHEM AGRICOLTURA S.p.A.,CCM S.r.l.,TECNOCENTRO S.r.l.
- 当前专利权人： ENICHEM AGRICOLTURA S.p.A.,CCM S.r.l.,TECNOCENTRO S.r.l.
- 当前专利权人地址： Via Ruggero Settimo 55 I-90139 Palermo IT
- 代理机构： Fusina, Gerolamo
- 优先权： IT1936387 19870213
- 主分类号： C07C275/02
- IPC分类号： C07C275/02
摘要：
Calcium-urea nitrate [Ca(NO₃)₂.4CO(NH₂)₂] is produced by means of a process, according to which:
- a liquid composition is prepared, at a temperature not higher than 170°C, which contains urea and calcium nitrate, in a molar ratio to each other equal to, or approximately equal to, 4/1, and having a water content comprised within the range of from 0 to 15% by weight;
- said liquid composition is sprayed, through a spray nozzle, on previously formed solid particles of calcium-urea nitrate, kept moving at a temperature comprised within the range of from 40 to approximately 100°C, and under a stream of an inert gas;
- calcium-urea nitrate is recovered from said solid products from the spray. The so obtained calcium-urea nitrate is in the form of a granular and free-flowing solid, free from the tendency to form dusts, and is useful in agriculture as a nitrogenous fertilizer. Also the suitable equipment for carrying out the process of calcium-urea nitrate preparation as a continuous process is disclosed.
- a liquid composition is prepared, at a temperature not higher than 170°C, which contains urea and calcium nitrate, in a molar ratio to each other equal to, or approximately equal to, 4/1, and having a water content comprised within the range of from 0 to 15% by weight;
- said liquid composition is sprayed, through a spray nozzle, on previously formed solid particles of calcium-urea nitrate, kept moving at a temperature comprised within the range of from 40 to approximately 100°C, and under a stream of an inert gas;
- calcium-urea nitrate is recovered from said solid products from the spray. The so obtained calcium-urea nitrate is in the form of a granular and free-flowing solid, free from the tendency to form dusts, and is useful in agriculture as a nitrogenous fertilizer. Also the suitable equipment for carrying out the process of calcium-urea nitrate preparation as a continuous process is disclosed.
公开/授权文献
- EP0278562B1 Process for producing calcium urea-nitrate 公开/授权日：1993-08-04
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