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一酸式磷(膦)酸酯萃取钼氧离子的规律
Authors
于淑秋
Publication date
1 January 1987
Publisher
Abstract
本文研究不同结构的一酸式磷(膦)酸酯萃取钼氧离子(MoO_2~(2+))的规律。研究表明,磷氧键参与了配位。三类萃取剂的基本结构形式为:A类:(R′O)(R″O)PO(OH);B类:(R′O)(R″)PO(OH);C类:(R′)(R″)PO(OH)。A类萃取剂萃取含氧阳离子的能力较碳链结构相似的B类和C类弱。A类萃取剂以二聚体参与配位。在萃取络合物中存在自由萃取剂分子同萃取剂阴离子间的氢键缔合,形成共顶多面体,增强了萃合物的稳定性。随着分子内C—P键增多,萃取能力和萃取容量相应增高。三类萃取剂分离钨、钼能力不同。A类萃取剂如HDEHP(P204)分离效果最佳,B类次之,C类最差
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Last time updated on 09/11/2016