公开(公告)号：EP0495937A1

公开(公告)日：1992-07-29

申请号：EP91911661.6

申请日：1991-07-03

申请人： PROINSUR PROMOCIONES INDUSTRIALES DEL SUR, S.A.

发明人： PIEDRAFITA PALACIOS, Adolfo

IPC分类号： C01F11/18 ,  C01F11/38 ,  C05C1/00

CPC分类号： C05D9/00 ,  C01C1/185 ,  C01C1/26 ,  C01F11/187 ,  C01F11/38 ,  C01F11/46 ,  C01P2006/80 ,  C05C1/00 ,  C05D3/02

摘要： Method for obtaining fertilizing salts and derivatives of strontium, by wet process, starting from mineral material such as strontium sulphate which is reacted with ammonium carbonate in excess. This reaction is carried out continuously and with counter-current flows of reagents. This excess of ammonium carbonate used is recovered in order to recycle it in the process and to isolate the ammonium sulphate which may be treated continuously with a lime carbonate or oxide, recovering the gases evolved by the reaction and obtaining as final product lime sulphate (gypsum). In a second phase, strontium carbonate obtained is continuously reacted with nitric acid in order to obtain strontium nitrate, part of which is carbonated with gases (CO₂ and NH₃) producing a precipitate of strontium carbonate and a solution of ammonium nitrate.

摘要翻译： 通过湿法从锶硫酸盐等矿物材料中获得肥料盐和锶衍生物的方法，其与碳酸铵过量反应。 该反应是连续进行的并且具有逆流的试剂流。 回收这种过量的碳酸铵以便在该方法中循环使用，并分离可以用石灰碳酸盐或氧化物连续处理的硫酸铵，回收通过反应放出的气体并获得最终产物石灰硫酸盐（石膏 ）。 在第二阶段中，所得到的碳酸锶与硝酸连续反应以获得硝酸锶，其中一部分用气体（CO 2和NH 3）碳酸化，产生碳酸锶和硝酸铵溶液的沉淀物。