公开(公告)号：US5126116A

公开(公告)日：1992-06-30

申请号：US716572

申请日：1991-06-17

申请人： Eberhard Krause ,  Vladimir J. Zatka ,  Steven W. Laundry

发明人： Eberhard Krause ,  Vladimir J. Zatka ,  Steven W. Laundry

IPC分类号： C01G28/02

CPC分类号： C01G28/02 ,  C01P2006/60 ,  C01P2006/80 ,  C01P2006/82

摘要： The invention provides a method of forming copper arsenate. Copper and arsenic are leached into a treatment solution maintained at a pH level of about 2 to 5 in the presence of at least one impurity. An oxidant is added to the treatment solution to oxidize the copper and arsenic. A copper arsenate compound is precipitated from the solution as copper arsenate. Preferably, the copper arsenate is then releached in a purification solution. The molar ratio of copper to arsenic is adjusted to a level of at least 2. The pH of the purification solution is then increased to precipitate copper arsenate having a decreased concentration of said at least one impurity. Impure copper arsenate may be suspended and reacted in a recrystallization solution preferably having cupric ion. The pH of recrystallization solution is adjusted to a valve between about 1 and 4.5.

摘要翻译： 本发明提供一种形成砷酸铜的方法。 在存在至少一种杂质的情况下，将铜和砷浸入维持在约2至5的pH水平的处理溶液中。 将氧化剂加入到处理溶液中以氧化铜和砷。 砷酸铜化合物作为砷酸铜从溶液中沉淀出来。 优选地，将砷酸铜在净化溶液中重新排列。 将铜与砷的摩尔比调节至至少2的水平。然后提高纯化溶液的pH以沉淀具有降低的所述至少一种杂质浓度的砷酸铜。 不纯的砷酸铜可以悬浮并在优选具有铜离子的重结晶溶液中反应。 将再结晶溶液的pH调节至约1至4.5之间的阀。