Abstract
Room temperature ionic liquids show potential as an alternative to conventional organic membrane solvents mainly due to their properties of low vapor pressure, low volatility and they are often stable. In the present work, the technical feasibilities of room temperature ionic liquids as bulk liquid membranes for phenol removal were investigated experimentally. Three ionic liquids with high hydrophobicity were used and their phenol removal efficiency, membrane stability and membrane loss were studied. Besides that, the effects of several parameters, namely feed phase pH, feed concentration, NaOH concentration and stirring speeds on the performance of best ionic liquid membrane were also evaluated. Lastly, an optimization study on bulk ionic liquid membrane was conducted and the maximum phenol removal efficiency was compared with the organic liquid membranes. The preliminary study shows that high phenol extraction and stripping efficiencies of 96.21% and 98.10%, respectively can be achieved by ionic liquid membrane with a low membrane loss which offers a better choice to organic membrane solvents.
Highlights
Phenol is an organic substance which is used in several manufacturing processes such as for the manufacture of phenolic resin and other phenol derivative chemicals
The performance of bulk ionic liquid membrane by different types of ionic liquids was evaluated in terms of phenol extraction efficiency, stripping efficiency, membrane stability and membrane loss
The work of Fan et al [20] claimed that the increment of ionic liquids’ hydrophobicity and hydrogen bond basicity strength increased phenol extraction efficiency, the present work showed that the hydrophobicity of ionic liquids had less effect on governing the phenol extraction efficiency
Summary
Phenol is an organic substance which is used in several manufacturing processes such as for the manufacture of phenolic resin and other phenol derivative chemicals. Despite the favorable phenol extraction efficiency in liquid-liquid extraction, the utilization of imidazolium based ionic liquid membrane for phenol removal is less studied Instead, they are some published information on the separation of other organic compounds such as toluene [22], aromatic hydrocarbons [23], trans-esterification products [11, 24] and selective separation of 1-butanol, 1-propanol, cyclohexanol, 1,4-dioxane, cyclohexanone, morpholine and methylmorpholine [25] by these ionic liquids. They are some published information on the separation of other organic compounds such as toluene [22], aromatic hydrocarbons [23], trans-esterification products [11, 24] and selective separation of 1-butanol, 1-propanol, cyclohexanol, 1,4-dioxane, cyclohexanone, morpholine and methylmorpholine [25] by these ionic liquids These works show that imidazolium based ionic liquid membranes provide selective transport with good stability. An optimization study of ionic liquid membrane for maximum overall phenol recovery was carried out and its performance was compared with kerosene and dichloromethane, the organic liquid membranes
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
