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Salt Effect in Organic Solvent Extraction of Pyruvic Acid
Author(s): 
Pages: 587-590
Year: Issue:  6
Journal: JOURNAL OF CHEMICAL ENGINEERING OF CHINESE UNIVERSITIES

Keyword:  丙酮酸无机阴离子萃取氢键缔合离子对缔合;
Abstract: 以三辛胺为萃取剂,在不同离子类型及离子强度下对丙酮酸的络合萃取过程进行了研究.结果表明,在一定pH范围内,随无机离子浓度的增加,丙酮酸分配系数随盐浓度的增加而迅速降低;萃后水相pH随盐浓度的增加均有不同程度的升高,在同一离子强度下,萃取剂浓度越高,萃后水相pH上升幅度越大.红外光谱的分析结果证实了无机阴离子可能通过同离子竞争,抑制了丙酮酸根离子与络合剂的离子对缔合作用,从而降低了萃取效果.
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