文档介绍：Recovery of aniline from wastewater by solvent
extraction enhanced with salting-out effect*
LI Changhai LI Changhai
Binzhou University Dept. of Chemical Engineering
Binzhou 256603, China Changchun University of Technology
E-mail : lichanghai2000@ Changchun, China
Abstract—Nitrobenzene extraction enhanced by salting-out effect processes for this purpose, application of these processes;
was employed to recover aniline from wastewater at 25℃. The however, is sometimes restricted because of environmental or
batchwise experiments were conducted to elucidate the influence technical constraints. The traditional solvent extraction usually
of various operating variables on the extracting performance, produces anic secondary waste which may cause
including acidity of wastewater, initial aniline environmental problems and desorption of activated carbon is
concentration, ratios of solvent versus wastewater, very difficult because of regeneration costs. Therefore, there is
extraction stages, concentrations and species of anic
a need for the development of an new extraction process
salts, such as NaCl, KCl, Na2SO4, CaCl2 and K2SO4. High
pH values and volume ratios of nitrobenzene/wastewater was where aniline can be removed satisfactorily.
more suitable for recovery of aniline. Besides, the recovery of In this study, the multiple stages extraction is appl