Eztraction and mechanisms of acid dyes into a room temperature ionic liquid
Investigation of Liquid-liquid extraction of acid dyes is carried out by using ionic liquid -1-butyl-3-methylimidazolium hexafluorophosphate (BMIMPF6) as extraction phase. Effects of its process parameters are studied such as extraction phase ratio, pH of the aqueous phase, concentration of salt. Important results are obtained that acid dyes can be extracted with BMIMPF6 quantitatively, however, different acid dyes proceed through different mechanisms. The anion-exchange extraction process is predominantly responsible for the extraction of acid yellow RN, while the ion-pair process is for Acid Brilliant Red B. The pH value has a great impact on the removal efficiency of the acid dyes. This pH swing effect may be a good solution for the recovery of acid dyes after extraction.
Room temperature ionic liquids liquid–liquid eztraction soluble Acid Dyes mechanisms
Changping Li Baoping Xin
College of Environment and Chemical Engineering Dalian University Dalian, 116622, China School of Chemical Engineering and the Environment Beijing Institute of Technology Beijing, 100081,
国际会议
上海
英文
3190-3193
2008-05-16（万方平台首次上网日期，不代表论文的发表时间）