公开(公告)号：US4762692A

公开(公告)日：1988-08-09

申请号：US13885

申请日：1987-02-12

申请人： Klaus Beltz ,  Klaus Frankenfeld ,  Peter Ruschke ,  Gerhard Eich

发明人： Klaus Beltz ,  Klaus Frankenfeld ,  Peter Ruschke ,  Gerhard Eich

IPC分类号： C01G11/02 ,  C01B25/46 ,  C01B25/234

CPC分类号： C01B25/461 ,  C01B25/462

摘要： Disclosed is a process for the precipitation and separation of cadmium sulphide from the raffinates derived from phosphoric acid purification by treating the cadmium containing streams of the raffinates with a H.sub.2 S containing solvent phase in a mixing-settling apparatus, by separating the raffinate phase from the cadmium sulphide containing solvent phase and by separating the precipitated cadmium sulphide from the solvent phase. By operating this process it is possible to remove cadmium in a simple manner from the raffinates since their inherent properties don't influence the precipitation and separation of cadmium sulphide.

摘要翻译： 本发明公开了一种通过在混合沉淀装置中通过用含硫化氢溶剂相处理含有镉的萃余液的流，通过将萃余液相与镉分离而从硫酸镉纯化中提取的残渣中沉淀和分离硫化镉的方法 含硫化物溶剂相，并将沉淀的硫化镉与溶剂相分离。 通过操作该方法，可以以简单的方式从萃余液中除去镉，因为其固有的性质不影响硫化镉的沉淀和分离。

公开(公告)号：US5068094A

公开(公告)日：1991-11-26

申请号：US529193

申请日：1990-05-25

申请人： Klaus Frankenfeld ,  Klaus Beltz ,  Gerhard Eich ,  Klaus Endrich

发明人： Klaus Frankenfeld ,  Klaus Beltz ,  Gerhard Eich ,  Klaus Endrich

IPC分类号： C01B25/238 ,  C01B25/46 ,  C01G11/00 ,  C22B3/28

CPC分类号： C22B3/0012 ,  C01B25/238 ,  C01B25/46 ,  C01G11/003 ,  Y02P10/234

摘要： A process for the removal of cadmium ions by liquid-liquid extraction from wet process phosphoric acid, which had been obtained from crude phosphate ores by dissolution with sulfuric acid, uses salts of long chain alkyl amines or ammonium bases with the chlorocomplexes of polyvalent metal ions, which are dissolved in an inert organic solvent.

摘要翻译： 通过用硫酸溶解而从粗磷酸盐矿石中获得的湿法磷酸液相萃取中去除镉离子的方法使用长链烷基胺或铵碱的盐与多价金属离子的氯络合物 ，其溶解在惰性有机溶剂中。

公开(公告)号：US4492680A

公开(公告)日：1985-01-08

申请号：US495653

申请日：1983-05-18

申请人： Klaus Frankenfeld ,  Peter Ruschke ,  Peter Brodt ,  Gerhard Eich

发明人： Klaus Frankenfeld ,  Peter Ruschke ,  Peter Brodt ,  Gerhard Eich

IPC分类号： C01B25/238 ,  C01G11/00 ,  C22B3/28 ,  C01B25/16 ,  B03C1/00 ,  C01G9/00

CPC分类号： C01G11/003 ,  C01B25/238 ,  C22B3/0012 ,  Y02P10/234

摘要： The invention is concerned with a process of removing cadmium from acid, especially P.sub.2 O.sub.5 -containing solutions by liquid/liquid extraction with the aid of alkyl amine salts that are dissolved in an inert, organic solvent. The cadmium ions are removed from the acid, aqueous phase and are enriched in the organic phase. The cadmium-containing organic phase, subsequently, is re-extracted with an aqueous salt solution, with the cadmium ions migrating from the organic phase into the aqueous phase. The process is particularly suitable for extracting cadmium from concentrated, highly acid aqueous solutions.

摘要翻译： 本发明涉及借助于溶解在惰性有机溶剂中的烷基胺盐，通过液/液萃取从酸，特别是含P2O5的溶液中除去镉的方法。 从酸，水相中除去镉离子，富含有机相。 随后，含镉的有机相用盐水溶液重新萃取，镉离子从有机相迁移到水相中。 该方法特别适用于从浓缩的高酸性水溶液中提取镉。