发明公开
- 专利标题： Process for granulating potassium salts
- 专利标题（中）： Verfahren zum Granulieren von Kaliumsalzen。
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申请号： EP91120250.5申请日： 1991-11-27
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公开(公告)号： EP0488199A1公开(公告)日： 1992-06-03
- 发明人: Cocquio, Fabrizio, Dr. , Nardon, Danilo , Fortibuoni, Raffaello , Silvestrin, Leonardo
- 申请人： ENICHEM AGRICOLTURA S.p.A.
- 申请人地址： Via Ruggero Settimo 55 I-90139 Palermo IT
- 专利权人： ENICHEM AGRICOLTURA S.p.A.
- 当前专利权人： ENICHEM AGRICOLTURA S.p.A.
- 当前专利权人地址： Via Ruggero Settimo 55 I-90139 Palermo IT
- 代理机构： Weinhold, Peter, Dr.
- 优先权： IT2220990 19901127
- 主分类号： C01D5/00
- IPC分类号： C01D5/00
摘要：
Disclosed is a process for granulating potassium salts, which comprises:
a) preparing a bentonite gel by mixing (A) bentonite (1) with water (2) in a water:bentonite ratio of from 5:1 to 15:1, and adding a potassium salt (4) to said gel at 60 to 80°C;
b) feeding the slurry obtained in step (a) into a rotary drum granulator, in which the slurry (8) is sprayed onto a bed of preformed and recycled hot granules (D), adjusting the moisture content of the granules leaving the granulator (12) in the range of from 4 to 8% and the recycling ratio at from 12:1 to 18:1;
c) drying by means of flue gases (E) (at 250-270°C) the granules of step (b) until the moisture content thereof is from 2.0 to 3.5% by weight, the granule temperature at the outlet of the drying zone (15) ranging from 60 to 85°C.
a) preparing a bentonite gel by mixing (A) bentonite (1) with water (2) in a water:bentonite ratio of from 5:1 to 15:1, and adding a potassium salt (4) to said gel at 60 to 80°C;
b) feeding the slurry obtained in step (a) into a rotary drum granulator, in which the slurry (8) is sprayed onto a bed of preformed and recycled hot granules (D), adjusting the moisture content of the granules leaving the granulator (12) in the range of from 4 to 8% and the recycling ratio at from 12:1 to 18:1;
c) drying by means of flue gases (E) (at 250-270°C) the granules of step (b) until the moisture content thereof is from 2.0 to 3.5% by weight, the granule temperature at the outlet of the drying zone (15) ranging from 60 to 85°C.
公开/授权文献
- EP0488199B1 Process for granulating potassium salts 公开/授权日：1995-01-18
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