公开(公告)号：US06270738B1

公开(公告)日：2001-08-07

申请号：US09421742

申请日：1999-10-20

申请人： Simo Jokinen ,  Stefan Jäfverström ,  Timo Kenakkala

发明人： Simo Jokinen ,  Stefan Jäfverström ,  Timo Kenakkala

IPC分类号： C01G4900

CPC分类号： C01G49/00 ,  C02F1/5245

摘要： The invention relates to a process for preparing a usable product, in particular a water treatment solution which contains ferric iron, from an impure ferric sulfate solution which contains as an impurity at least one other metal, the process comprising a first precipitation step in which a base is added to the said impure ferric sulfate solution in order to raise the pH to approx. 2-5, preferably approx. 3-4, whereupon ferric hydroxide precipitates; following the first precipitation step, a second precipitation step in which there are added to the solution an oxidant and a base to raise the pH to approx. 6-10, preferably approx. 8-9, whereupon the said impurity metal precipitates; and one or more separation steps to separate from the sulfate solution the solids precipitated in the first and the second precipitation steps; as well as possibly an additional step in which the said separated solids, or a portion thereof, are treated further in order to form a usable product.

摘要翻译： 本发明涉及从含有至少一种其它金属的杂质的不纯的硫酸铁溶液制备可用的产品，特别是含有三价铁的水处理溶液的方法，该方法包括第一沉淀步骤，其中碱 加入到所述不纯的硫酸铁溶液中，以将pH升高至约 2-5，优选约 3-4，因此氢氧化铁沉淀;在第一沉淀步骤之后，进行第二沉淀步骤，其中向溶液中加入氧化剂和碱，以将pH升高至约 6-10，优选约 8-9，所述杂质金属析出; 以及在第一和第二沉淀步骤中从硫酸盐溶液中分离固体沉淀的一个或多个分离步骤; 以及可能的另外的步骤，其中进一步处理所述分离的固体或其一部分以形成可用的产物。

公开(公告)号：US06893474B2

公开(公告)日：2005-05-17

申请号：US10164111

申请日：2002-06-05

申请人： Stefan Jäfverström ,  Neil Clarke

发明人： Stefan Jäfverström ,  Neil Clarke

IPC分类号： B01J19/00 ,  C01B17/96 ,  C01F7/26 ,  C01F7/56 ,  C01F7/74 ,  B01D9/02

CPC分类号： C01F7/748 ,  B01J2219/00006 ,  C01B17/96 ,  C01F7/26 ,  C01F7/56

摘要： In a method of purifying an aluminium salt from a first aqueous aluminium salt solution of a raw material containing impurities, which comprise salts of at least one more noble metal than aluminium dissolved therein, a method of purifying a metal salt from inorganic impurities in an aqueous solution thereof is included. A plant for carrying out the method is also shown.

摘要翻译： 在从包含杂质的原料的第一含水铝盐溶液中提炼铝盐的方法中，所述杂质包含比其中溶解有铝的至少一种贵金属的盐，从水溶液中的无机杂质中提纯金属盐的方法 包括其溶液。 还显示了用于执行该方法的设备。