Recovery of aniline from wastewater by solvent extraction enhanced with salting-out effect
Nitrobenzene extraction enhanced by salting-out effect was employed to recover aniline from wastewater at 25℃. The batchwise experiments were conducted to elucidate the influence of various operating variables on the extracting performance, including acidity of wastewater, initial aniline concentration, ratios of solvent versus wastewater, extraction stages, concentrations and species of inorganic salts, such as NaCl, KCl, Na2SO4, CaCl2 and K2SO4. High pH values and volume ratios of nitrobenzene/wastewater was more suitable for recovery of aniline. Besides, the recovery of aniline was significantly elevated with increasing concentrations of salts, whose promoting effects were in the following order: NaCl >Na2SO4 >K2SO4>CaCl2 >KCl on the weight basis of wastewater. It is remarkable that aniline in wastewater would be almost completely recovered by sequential five stages nitrobenzene extraction, promoted continuously by salting - out effect.
LI Changhai LI Changhai
Binzhou University Binzhou 256603, China Dept.of Chemical Engineering Changchun University of Technology Changchun, China
国际会议
成都
英文
1-4
2010-06-18（万方平台首次上网日期，不代表论文的发表时间）