Comparative studies on the extraction of Cu（Ⅱ） have been performed by 2-hydroxy-5-（1-methylheptyl） benzaldoxime （N-590） without or with n-dodecanol as modifier, 2-hydroxy-5- （1-metylheptyl） benzophenone oxime...Comparative studies on the extraction of Cu（Ⅱ） have been performed by 2-hydroxy-5-（1-methylheptyl） benzaldoxime （N-590） without or with n-dodecanol as modifier, 2-hydroxy-5- （1-metylheptyl） benzophenone oxime （N-510）, and 2-hydroxy-4-（1-methylheptyloxy） ben-zophenone oxime （N-530）. When the extraction is carried out in feed liquor containing Cu1.03 g/L and Fe 10.7 g/L by 0. 1 mol·dm<sup>-3</sup> extractant in kerosene, the Cu percentage extrac- tion of 95.6, 89 and 63%, and Cu（Ⅱ）-Fe（Ⅲ） separation factor of 1.46×10<sup>3</sup>, 4.76×10<sup>2</sup>and 1.26×10<sup>2</sup> are obtained with N-590, N-530 and N-510, respectively; moreover the Cuextraction and stripping speed with N-590 is greatly higher than that with N-530 and N-510. Addition of 2% n-dodecanol into 0.1 mol·dm<sup>-3</sup> N-590 in kerosene improved the strip-ping behaviour.展开更多
3,5-Diaryl-1,2,4-oxadiazoles were synthesized by homocoupling of chloroarylaldoxime from arylaldoxime and N-chlorosuccinimide(NCS)in the presence of Cs_(2)CO_(3) in one pot.The method is suitable for thiophene-3-carba...3,5-Diaryl-1,2,4-oxadiazoles were synthesized by homocoupling of chloroarylaldoxime from arylaldoxime and N-chlorosuccinimide(NCS)in the presence of Cs_(2)CO_(3) in one pot.The method is suitable for thiophene-3-carbaldehyde,ison-icotinaldehyde and arylaldehyde without active substituent with a yield from 19%to 78%.However,it was not suitable for aliphatic aldehydes,other heteroaromatic aldehydes and benzaldehydes carrying active groups(hydroxyl,amino and carbox-ylic acid).Compared to reported methods,this method uses only aromatic aldoxime as a single substrate.The process is sim-ple,convenient,and green,making it a reliable way to synthesize 3,5-(homo-substituted)-1,2,4-oxadiazoles.展开更多
文摘Comparative studies on the extraction of Cu（Ⅱ） have been performed by 2-hydroxy-5-（1-methylheptyl） benzaldoxime （N-590） without or with n-dodecanol as modifier, 2-hydroxy-5- （1-metylheptyl） benzophenone oxime （N-510）, and 2-hydroxy-4-（1-methylheptyloxy） ben-zophenone oxime （N-530）. When the extraction is carried out in feed liquor containing Cu1.03 g/L and Fe 10.7 g/L by 0. 1 mol·dm<sup>-3</sup> extractant in kerosene, the Cu percentage extrac- tion of 95.6, 89 and 63%, and Cu（Ⅱ）-Fe（Ⅲ） separation factor of 1.46×10<sup>3</sup>, 4.76×10<sup>2</sup>and 1.26×10<sup>2</sup> are obtained with N-590, N-530 and N-510, respectively; moreover the Cuextraction and stripping speed with N-590 is greatly higher than that with N-530 and N-510. Addition of 2% n-dodecanol into 0.1 mol·dm<sup>-3</sup> N-590 in kerosene improved the strip-ping behaviour.
文摘3,5-Diaryl-1,2,4-oxadiazoles were synthesized by homocoupling of chloroarylaldoxime from arylaldoxime and N-chlorosuccinimide(NCS)in the presence of Cs_(2)CO_(3) in one pot.The method is suitable for thiophene-3-carbaldehyde,ison-icotinaldehyde and arylaldehyde without active substituent with a yield from 19%to 78%.However,it was not suitable for aliphatic aldehydes,other heteroaromatic aldehydes and benzaldehydes carrying active groups(hydroxyl,amino and carbox-ylic acid).Compared to reported methods,this method uses only aromatic aldoxime as a single substrate.The process is sim-ple,convenient,and green,making it a reliable way to synthesize 3,5-(homo-substituted)-1,2,4-oxadiazoles.
