Batch Liquid‐Liquid Extraction of Phenol from Aqueous Solutions

Abstract

The aim of this work is the study of batch liquid-liquid extraction of phenol from aqueous solutions in a bench-scale well-mixed reactor. The influence of the ratio of phase volumes, temperature, and rotational speed on phenol removal (0.72-1.1 % w/w) was investigated using methyl isobutyl ketone as an extracting solvent. For this purpose, the ratio of phase volumes were set at 0.1 and 0.2, the temperature at 10, 20, and 30°C, and the rotational speed at 300, 400, and 500 rpm. A physical model based on the material balance of the phases as well as the equation of mass flux between the phases allowed the estimation of the overall coefficient of mass transfer coupled with the superficial area. Moreover, it proved to fit, satisfactorily well, the experimental data of residual phenol concentration in the organic phase versus time under all the conditions investigated.

Facilitated transport of phenol through supported liquid membrane containing bis(2-ethylhexyl) sulfoxide (BESO) as the carrier

“…Conventional methods for PhOH removal can be subdivided into two main categories: destructive and recuperative processes [2]. Destructive processes include biodegradation [3], photocatalysis degradation [4], electrochemical oxidation degradation [5], and thermal decomposition [6], while recuperative processes include liquid-liquid extraction [7], adsorption [8,9], and solid extraction [10,11]. Liquid-liquid extraction is among the most-explored methods used for PhOH removal or separation from aqueous streams, and considered the most proper choice for phenol recovery from wastewater.…”

Production and separation of phenols from biomass-derived bio-petroleum

“…So, the achievement in the separation of phenols with high content from bio-petroleum will have potential economic benefits and must be valuable. Up to date, the methods on separation of phenols from aqueous solution included supported liquid membrane, adsorption on activated carbon, liquid-liquid extraction, polymeric reversed micelle extraction, pervaporation and reverse osmosis membrane [20][21][22][23][24][25]; the liquid-liquid extraction method was used to separate phenols from petroleum products [26,27], while the separation of phenols from bio-oil mixtures could be realized by different chemical and physical methods, such as solvent elution chromatography, liquid-liquid extraction, adsorption on different adsorbents and fractional distillation. Notably, solvent extraction and chemical adsorption are frequently used, and phenol recovery by liquid-liquid extraction also has been achieved [10,12,28,29].…”

Continuous Droplet-Based Liquid-Liquid Extraction of Phenol from Oil

“…In the context of this work, LLE has been done traditionally, using batch reactors (14,15) where the two immiscible organic and aqueous phases are separated by gravity or by centrifuge. The final concentration (3) of the analyte in the two phases depends on its partition coefficient which is a measure of the relative solubility of the analyte between the two phases.…”