铜电解液中的As、Sb、Bi离子含量是影响阴极铜质量的重要因素,现有的电解沉积法电耗高、铜损失量大,萃取方法和离子交换法存在液量大的缺陷。本文利用SO_(2)还原As^(5+)和Sb^(5+)、H_(2)O_(2)氧化As3+和Sb3+调整化合价,促使砷锑铋形成...铜电解液中的As、Sb、Bi离子含量是影响阴极铜质量的重要因素,现有的电解沉积法电耗高、铜损失量大,萃取方法和离子交换法存在液量大的缺陷。本文利用SO_(2)还原As^(5+)和Sb^(5+)、H_(2)O_(2)氧化As3+和Sb3+调整化合价,促使砷锑铋形成沉淀阳极泥的原理,进行了二氧化硫和双氧水并流沉淀方法降低铜电解液中砷锑铋杂质离子的实验研究,结果表明:一定条件下,单独向铜电解液中通入SO_(2)可以降低Sb离子浓度,但As、Bi离子浓度的变化幅度不大;单独向铜电解液中通入H_(2)O_(2)可以降低As、Sb离子浓度,但也会降低Cu、Bi离子浓度,严重时导致阳极钝化;在最佳条件下,H_(2)O_(2)采用滴加方式、加入量为4 m L/L、SO_(2)进气浓度为0.125 g/L、搅拌速度为250 r/min、反应温度为50℃,并流沉淀技术可以实现降低铜电解液中砷锑铋杂质离子的目的,且不会出现阳极钝化现象。展开更多
One new mixed-valence heptanuclear manganese complex, [Mn^ⅡMn^Ⅲ6O2L6-(NaCH3COO)2(CH3COO)4](1)(L = 3-ethoxy-6-((2-hydroxyethyl)imino)methyl) phenol, was synthesized by treating the Schiff-base ligand with Mn(acac)3...One new mixed-valence heptanuclear manganese complex, [Mn^ⅡMn^Ⅲ6O2L6-(NaCH3COO)2(CH3COO)4](1)(L = 3-ethoxy-6-((2-hydroxyethyl)imino)methyl) phenol, was synthesized by treating the Schiff-base ligand with Mn(acac)3·4H2O and characterized by elemental analysis, IR spectra, thermogravimetric analyses and X-ray single-crystal diffraction. 1 has a similar new mixed-valence heptanuclear structure. The magnetic measurements indicate that 1 exhibits the antiferromagnetic interactions.展开更多
文摘铜电解液中的As、Sb、Bi离子含量是影响阴极铜质量的重要因素,现有的电解沉积法电耗高、铜损失量大,萃取方法和离子交换法存在液量大的缺陷。本文利用SO_(2)还原As^(5+)和Sb^(5+)、H_(2)O_(2)氧化As3+和Sb3+调整化合价,促使砷锑铋形成沉淀阳极泥的原理,进行了二氧化硫和双氧水并流沉淀方法降低铜电解液中砷锑铋杂质离子的实验研究,结果表明:一定条件下,单独向铜电解液中通入SO_(2)可以降低Sb离子浓度,但As、Bi离子浓度的变化幅度不大;单独向铜电解液中通入H_(2)O_(2)可以降低As、Sb离子浓度,但也会降低Cu、Bi离子浓度,严重时导致阳极钝化;在最佳条件下,H_(2)O_(2)采用滴加方式、加入量为4 m L/L、SO_(2)进气浓度为0.125 g/L、搅拌速度为250 r/min、反应温度为50℃,并流沉淀技术可以实现降低铜电解液中砷锑铋杂质离子的目的,且不会出现阳极钝化现象。
基金financially supported by the Key Scientic Research Projects of Colleges and Universities,Henan Province(No.18A150020)Anyang Key Laboratory for Chemical Biosensing(No.21302003)
文摘One new mixed-valence heptanuclear manganese complex, [Mn^ⅡMn^Ⅲ6O2L6-(NaCH3COO)2(CH3COO)4](1)(L = 3-ethoxy-6-((2-hydroxyethyl)imino)methyl) phenol, was synthesized by treating the Schiff-base ligand with Mn(acac)3·4H2O and characterized by elemental analysis, IR spectra, thermogravimetric analyses and X-ray single-crystal diffraction. 1 has a similar new mixed-valence heptanuclear structure. The magnetic measurements indicate that 1 exhibits the antiferromagnetic interactions.