申请人:——
公开号:US20010055553A1
公开(公告)日:2001-12-27
Copper is preferentially extracted from iron in an aqueous feedstock solution containing dissolved copper and iron values by contacting the feedstock solution with a water-immiscible organic solution comprised of a hydrocarbon solvent and a compound of the formula I
1
wherein R
5
is a C
1-22
linear or branched alkyl group, a C
2-22
linear or branched alkenyl group, a C
6
aryl group, a C
7-22
aralkyl group, a halogen, OH or —OR
6
wherein R
6
is a C
1-22
linear or branched alkyl group, a C
2-22
linear or branched alkenyl group, a C
6
aryl group, a C
7-22
aralkyl group; R
1
is hydrogen, or a C
1-22
linear or branched alkyl or alkenyl group, a C
6
aryl group or a C
7-22
aralkyl group; R
2
-R
4
is hydrogen, halogen, a linear or branched C
6-12
alkyl group, —OR
6
wherein R
6
is a C
1-22
linear or branched alkyl group, a C
2-22
linear or branched alkenyl group, a C
6
aryl group, or a C
7-22
aralkyl group to form an aqueous phase comprised of iron and an organic phase comprised of the hydrocarbon solvent and a copper-extractant complex wherein the copper-extractant complex is soluble in the hydrocarbon solvent. The R
2
-R
5
groups are chosen so that the copper-extractant complex is soluble in the hydrocarbon solvent. After the extraction stage is completed and the organic and aqueous phases separate, the organic phase is substantially free of iron and/or an iron-extractant complex.
在含有溶解的铜和铁价值的水性原料溶液中,通过将原料溶液与由烃溶剂和化合物I1组成的水不相溶的有机溶液接触,可以更优先地从铁中提取铜。其中,R5是C1-22线性或支链烷基、C2-22线性或支链烯基、C6芳基、C7-22芳基烷基、卤素、OH或—OR6,其中R6是C1-22线性或支链烷基、C2-22线性或支链烯基、C6芳基、C7-22芳基烷基;R1是氢,或C1-22线性或支链烷基或烯基、C6芳基或C7-22芳基烷基;R2-R4是氢、卤素、线性或支链C6-12烷基、—OR6,其中R6是C1-22线性或支链烷基、C2-22线性或支链烯基、C6芳基或C7-22芳基烷基,以形成由铁组成的水相和由烃溶剂和铜萃取剂复合物组成的有机相,其中铜萃取剂复合物在烃溶剂中可溶。选择R2-R5基团,以使铜萃取剂复合物在烃溶剂中可溶。在萃取阶段完成并且有机相和水相分离后,有机相基本上不含铁和/或铁萃取剂复合物。