公开(公告)号：US6149885A

公开(公告)日：2000-11-21

申请号：US67020

申请日：1998-04-28

申请人： Susumu Makino ,  Naoyuki Tsuchida ,  Atsushi Goda ,  Sunao Kanesaka ,  Masaki Imamura ,  Kazuyuki Takaishi ,  Yoshitomo Ozaki

发明人： Susumu Makino ,  Naoyuki Tsuchida ,  Atsushi Goda ,  Sunao Kanesaka ,  Masaki Imamura ,  Kazuyuki Takaishi ,  Yoshitomo Ozaki

IPC分类号： C22B3/00 ,  C22B3/26 ,  C22B3/32 ,  C22B23/00 ,  C01B17/96 ,  C01G53/00

CPC分类号： C22B3/0005 ,  C22B23/0453 ,  Y02P10/234

摘要： A method of purifying a crude nickel sulfate solution to give pure nickel sulfate through solvent extraction, in which the impurities such as cobalt, calcium, magnesium, iron, zinc, copper, sodium, ammonia and others to be in the crude solution are removed while, if necessary, effectively recovering cobalt, and for which the amount of a neutralizer to be used is reduced and the cost of treating wastewater is also reduced includes an extraction step of adding an organic acid extractant to a crude nickel sulfate solution to thereby extract nickel into the extractant to give a nickel-loaded organic phase, followed by a scrubbing step of scrubbing the organic phase as obtained in the previous extraction step with a nickel-containing scrub solution to thereby remove sodium and ammonia from the organic phase; and a second purifying step of adding a crude nickel sulfate solution to the nickel-retaining organic phase as obtained in the previous first purifying step so as to exchange the nickel in the organic phase with the impurities except sodium and ammonia existing in the crude nickel sulfate solution added in this step, thereby giving a purified nickel sulfate solution and an organic phase containing impurities; and optionally a third purifying step of recovering nickel from the organic the organic phase containing impurities as obtained in the second purifying step, and a step of recovering a valuable metal, cobalt from the organic phase containing impurities.

摘要翻译： 纯化粗硫酸镍溶液以通过溶剂萃取纯化的硫酸镍的方法，其中除去粗溶液中的杂质如钴，钙，镁，铁，锌，铜，钠，氨等，同时 如果需要，有效地回收钴，并且其中使用的中和剂的量减少，并且处理废水的成本也降低包括将有机酸萃取剂加入到粗硫酸镍溶液中以提取镍的提取步骤 进入萃取剂中以得到负载镍的有机相，然后用含镍洗涤溶液洗涤在先提取步骤中获得的有机相的洗涤步骤，从而从有机相中除去钠和氨; 以及第二纯化步骤，将粗硫酸镍溶液加入到先前的第一纯化步骤中得到的镍保留有机相上，以将有机相中的镍与存在于粗硫酸镍中的钠和氨以外的杂质 在此步骤中加入溶液，从而得到纯化的硫酸镍溶液和含有杂质的有机相; 以及任选的第三纯化步骤，从第二纯化步骤中得到的含有杂质的有机相中回收镍，以及从含有杂质的有机相中回收有价值的金属钴的工序。