Inas M. AlNashef | King Saud University (original) (raw)

Uploads

Papers by Inas M. AlNashef

Research paper thumbnail of Phase equilibria behavior of carbon dioxide-n-hexane-naphthalene ternary system

Korean Journal of Chemical Engineering, 2008

The ternary system CO2-n-hexane-naphthalene was studied to determine the bubble point pressure at... more The ternary system CO2-n-hexane-naphthalene was studied to determine the bubble point pressure at three different temperatures (40, 60 and 80 °C) and a fixed n-hexane to naphthalene mole ratio of 9: 1. The experimental data obtained were predicted by using the Peng-Robinson equation of state with two interaction parameters. The experimental and calculated bubble point pressures were generally in good agreement at the three temperatures and over the composition range investigated.

Research paper thumbnail of Densities of ammonium and phosphonium based deep eutectic solvents: Prediction using artificial intelligence and group contribution techniques

Thermochimica Acta

As applications of deep eutectic solvents are growing fast as green alternatives, prediction of p... more As applications of deep eutectic solvents are growing fast as green alternatives, prediction of physical properties data for such systems becomes a necessity for engineering application designs and new process developments. In this study, densities of three classes of deep eutectic solvents, based on a phosphonium and two ammonium salts, were measured. Two predictive models based on artificial intelligence and group contribution methods were proposed for accurate estimation and evaluation of deep eutectic solvent densities. A feed forward back propagation neural network with 9 hidden neurons was successfully developed and trained with the measured density data. The group contribution method applied the modified Lydersen–Joback–Reid, Lee–Kesler and the modified Rackett equations. The comparison of the predicted densities with those obtained by measurement confirmed the reliability of the neural network and the group contribution method with average absolute errors of 0.14 and 2.03%, respectively. Comparison of the model performances indicated a better predictability of the developed neural network over the group contribution method.► Densities of three classes of deep eutectic solvents were measured. ► Two predictive models based on ANNs and group contributions were proposed. ► The ANNs predicted density with an average absolute error of 0.14%. ► The group contribution method had reasonable predictability. ► The ANNs had better predictabilities, especially at higher temperatures.

Research paper thumbnail of Prediction of deep eutectic solvents densities at different temperatures

Thermochimica Acta, 2011

Predicting densities of nonconventional solvents like deep eutectic solvents (DESs) as a function... more Predicting densities of nonconventional solvents like deep eutectic solvents (DESs) as a function of temperature is of considerable importance in the development and design of new processes utilizing these solvents. Because of the nature of bonding existing between the salt and the hydrogen bond donor, conventional methods result in very large deviations. In this study, the density of DESs based on three different salts was estimated using empirical method. Nine different salts:hydrogen bond donor combinations were selected to test this method. The densities of all DESs were measured at a temperature range (298.15–368.1 K). The critical properties of salt and hydrogen bond donor were estimated using the Modified Lydersen–Joback–Reid method, while that of the mixture were calculated using Lee–Kesler equation. The Rackett equation modified by Spencer and Danner was employed to predict the DES density. The values of measured and predicted densities were compared and the average of absolute relative error percentage (ARPE) for all DESs was found to be 1.9%. The effect of salt to HBD molar ratio on ARPE in predicted DESs densities was also investigated.▶ An empirical method is introduced to predict deep eutectic solvents densities as function of temperature. ▶ The correlation showed high prediction quality for all tested DESs. ▶ The density of the DESs lies between the densities of the corresponding salt and HBD used in their synthesis. ▶ The relative difference of densities between the DES and the HBD directly affects the quality of density prediction.

Research paper thumbnail of Liquid-liquid equilibria of the ternary system water + acetic acid + 1-hexanol

Journal of Chemical and Engineering Data, 1997

Research paper thumbnail of Electrochemical Generation of Superoxide Ion in Ionic Liquid 1-(3-Methoxypropyl)-1-Methylpiperidinium Bis (Trifluoromethylsulfonyl) Imide

Iop Conference Series: Materials Science and Engineering, 2011

In this work, the superoxide ion was generated and analysed electrochemically using cyclic voltam... more In this work, the superoxide ion was generated and analysed electrochemically using cyclic voltammetry (CV) techniques from oxygen dissolved in a room-temperature ionic liquid, 1-(3-methoxypropyl)-1-methylpiperidinium bis (trifluoromethylsulfonyl) imide, at atmospheric pressure. It was found that the generated superoxide ion was stable which indicates its possible use for further useful applications. To the best of our knowledge, this is the first time a piperidinium based IL has been used for the electrochemical generation of O2.

Research paper thumbnail of Phase equilibria of the ternary system water/acetic acid/2-pentanol

Journal of Chemical and Engineering Data, 1996

Research paper thumbnail of Superoxide Electrochemistry in an Ionic Liquid

Industrial & Engineering Chemistry Research, 2002

Research paper thumbnail of Electrochemical Generation of Superoxide in Room-Temperature Ionic Liquids

Electrochemical and Solid State Letters, 2001

Research paper thumbnail of Synthesis of Carbonyl Compounds From Alcohols Using Electrochemically Generated Superoxide Ions in RTILs

Synthetic Communications, 2012

We show that the superoxide ion (O2•−) generated electrochemically from oxygen dissolved in room-... more We show that the superoxide ion (O2•−) generated electrochemically from oxygen dissolved in room-temperature ionic liquids (RTILs) reacts with primary and secondary alcohols to form the corresponding ketones and carboxylic acids, respectively. Specifically, we study the conversion of benzhydrol to benzophenone and benzyl alcohol to benzaldehyde/benzoic acid. The kinetics (e.g., rate, selectivity, and yield) for these reactions are also determined as functions of the variations in the structure of the ionic liquids. The RTILs used here are imidazolium-based cations where the functional groups on the imidazolium ring are modified. Specifically, 1-butyl-3-methylimidazolium hexafluorophosphate [bmim][PF6], 1-butyl-2,3-dimethylimidazolium hexafluorophosphate [bdmim][PF6], and 1-hexyl-3-methylimidazolium hexafluorophosphate [hmim][PF6] are used as the reaction medium. These results are compared to an ammonium-based RTIL (N-butyl-N-trimethylammonium bis(trifluoromethylsulfonyl)imide). The results show that the nucleophilic attack by the O2•− of both the RTIL and the alcohol, especially that of the H atom at the R2 position of the [bmim][PF6] and [hmim][PF6], greatly affects the yields. No RTIL degradation products were detected for the reactions in [bdmim][PF6] and N-butyl-N-trimethylammonium bis(trifluoromethylsulfonyl)imide ionic liquids. For the benzyl alcohol oxidation reaction in the RTIL, N-butyl-N-trimethylammonium bis(trifluoromethylsulfonyl)imide, benzaldehyde formed did not undergo further oxidation to form benzoic acid, which may be due to the greater hydrophobicity of this RTIL. The competitive reaction kinetics between the alcohol and RTIL component must be considered in the selection of the RTIL solvent system.

Research paper thumbnail of Long term stability of superoxide ion in piperidinium, pyrrolidinium and phosphonium cations-based ionic liquids and its utilization in the destruction of chlorobenzenes

Journal of Electroanalytical Chemistry

Research paper thumbnail of Using Deep Eutectic Solvents for the Removal of Glycerol from Palm Oil-Based Biodiesel

Journal of Applied Sciences, 2010

... Search result page 2552. Title: Using Deep Eutectic Solvents for the Removal of Glycerol from... more ... Search result page 2552. Title: Using Deep Eutectic Solvents for the Removal of Glycerol from Palm Oil-Based Biodiesel. Author: K. Shahbaz ; Farouq. S. Mjalli ; MA Hashim ; Inas. M. ALNashef. Abstract: One of the essential steps ...

Research paper thumbnail of Ethanesulfonic acid-based esterification of industrial acidic crude palm oil for biodiesel production

Bioresource Technology, 2011

An industrial grade acidic crude palm oil (ACPO) pre-treatment process was carried out using etha... more An industrial grade acidic crude palm oil (ACPO) pre-treatment process was carried out using ethanesulfonic acid (ESA) as a catalyst in the esterification reaction. ESA was used in different dosages to reduce free fatty acid (FFA) to a minimum level for the second stage of biodiesel production via alkaline transesterification reaction. Different process operating conditions were optimized such as ESA dosage (0.25–3.5% wt/wt), methanol to ACPO molar ratio (1:1–20:1), reaction temperature (40–70 °C), and reaction time (3–150 min). This study revealed the potential use of abundant quantities of ACPO from oil palm mills for biodiesel production. The lab scale results showed the effectiveness of the pre-treatment process using ESA catalyst. Three consecutive catalyst recycling runs were achieved without significant degradation in its performance. Second and third reuse runs needed more reaction time to achieve the target level of FFA content. Esterification and transesterification using ESA and KOH respectively is proposed for biodiesel industrial scale production. The produced biodiesel meets the international standards specifications for biodiesel fuel (EN 14214 and ASTM D6751).► Acidic crude palm oil is proposed as a raw material for biodiesel production. ► Ethanesulfonic acid is introduced as a new esterification catalyst. ► The acid was recycled for three batches with insignificant lose in efficiency. ► The produced biodiesel meets the international standards for biodiesel fuel.

Research paper thumbnail of A novel method for the synthesis of 2-imidazolones

Tetrahedron Letters, 2010

The superoxide ion electrochemically generated by reduction of oxygen, or chemically generated by... more The superoxide ion electrochemically generated by reduction of oxygen, or chemically generated by dissolving potassium superoxide in ionic liquids, reacts with alkyl imidazolium cations of imidazolium-based ionic liquids at room temperature and atmospheric pressure to give the corresponding 2-imidazolones in excellent yields.The superoxide ion electrochemically generated by reduction of oxygen, or chemically generated by dissolving potassium superoxide in ionic liquids, reacts with alkyl imidazolium cations of imidazolium-based ionic liquids at room temperature and atmospheric pressure to give the corresponding 2-imidazolones in excellent yields.

Research paper thumbnail of Electrochemical reduction of dioxygen in Bis (trifluoromethylsulfonyl) imide based ionic liquids

Journal of Electroanalytical Chemistry, 2011

Electrochemical generation of superoxide ion (O2-) has been investigated in three room temperatur... more Electrochemical generation of superoxide ion (O2-) has been investigated in three room temperature ionic liquids (ILs), based on bis (trifluoromethylsulfonyl) imide anion, [N(Tf)2]−, comprising the following cations N-(3-Hydroxypropyl)pyridinium, [HPPy]+, 1-(3-methoxypropyl)-1-methylpiperidinium, [MOPMPip]+, and 1-hexyl-1-methyl-pyrrolidinium, [HMPyrr]+. Cyclic voltammetry (CV) and chronoamperometry (CA) techniques were used for the analysis of the the electrochemical process. It was found that the generated O2- was not stable in the IL based on pyridinium cation, [HPPy]+. While a stable O2- was electrochemically generated in [MOPMPip]+ and [HMPyrr]+ based ILs. CV and CA techniques were used to determine the diffusion coefficients of O2 and solubility of oxygen in the studied ILs as a function of temperature. The diffusional activation energies were then determined. It was found that [HMPyrr]+ based IL, in general, has higher diffusion coefficient and solubility of O2 and less diffusional activation energy than [MOPMPip]+ based IL. For our best knowledge, this is the first time piperidinium based ILs has been used for the electrochemical generation of O2-.► O2- was stable in [MOPMPip]+ and [HMPyrr]+ based ILs. ► [HMPyrr]+ based IL in general has higher diffusion coefficient, electrical conductivity and O2 solubility than [MOPMPip]+ based IL. ► The density and viscosity for [MOPMPip]+ and [HMPyrr]+ based ILs decreased with temperature.

Research paper thumbnail of A novel technique for separating glycerine from palm oil-based biodiesel using ionic liquids

Fuel Processing Technology, 2010

Biodiesel production from abundant bio-sources has drawn the attention of the academic as well as... more Biodiesel production from abundant bio-sources has drawn the attention of the academic as well as the industrial communities in recent years. However, one of the most serious obstacles for using biodiesel as an alternative fuel is the complicated and costly purification processes involved in its production. The difficulties involved in the separation of glycerine and other un-reacted reactants and by-products necessitate the development of new competent low cost separation processes for this purpose. In this work, a low cost quaternary ammonium salt–glycerine-based ionic liquid is proposed as a solvent for extracting glycerine from the transesterification biodiesel product. The separation technique was tested on palm oil-based produced biodiesel with KOH as a reaction catalyst. The study investigated the effect of DES:biodiesel ratio and the DES composition on the efficiency of the extraction process. The lab scale purification experiments proved the viability of the separation technique with a best DES:biodiesel molar ratio of 1:1 and a DES molar composition of 1:1 (salt:glycerine). The purified biodiesel fulfilled the EN 14214 and ASTM D 6751 standard specifications for biodiesel fuel in terms of glycerine content. A continuous separation process is suggested for industrial scale application.

Research paper thumbnail of Phase equilibria behavior of carbon dioxide-n-hexane-naphthalene ternary system

Korean Journal of Chemical Engineering, 2008

The ternary system CO2-n-hexane-naphthalene was studied to determine the bubble point pressure at... more The ternary system CO2-n-hexane-naphthalene was studied to determine the bubble point pressure at three different temperatures (40, 60 and 80 °C) and a fixed n-hexane to naphthalene mole ratio of 9: 1. The experimental data obtained were predicted by using the Peng-Robinson equation of state with two interaction parameters. The experimental and calculated bubble point pressures were generally in good agreement at the three temperatures and over the composition range investigated.

Research paper thumbnail of Densities of ammonium and phosphonium based deep eutectic solvents: Prediction using artificial intelligence and group contribution techniques

Thermochimica Acta

As applications of deep eutectic solvents are growing fast as green alternatives, prediction of p... more As applications of deep eutectic solvents are growing fast as green alternatives, prediction of physical properties data for such systems becomes a necessity for engineering application designs and new process developments. In this study, densities of three classes of deep eutectic solvents, based on a phosphonium and two ammonium salts, were measured. Two predictive models based on artificial intelligence and group contribution methods were proposed for accurate estimation and evaluation of deep eutectic solvent densities. A feed forward back propagation neural network with 9 hidden neurons was successfully developed and trained with the measured density data. The group contribution method applied the modified Lydersen–Joback–Reid, Lee–Kesler and the modified Rackett equations. The comparison of the predicted densities with those obtained by measurement confirmed the reliability of the neural network and the group contribution method with average absolute errors of 0.14 and 2.03%, respectively. Comparison of the model performances indicated a better predictability of the developed neural network over the group contribution method.► Densities of three classes of deep eutectic solvents were measured. ► Two predictive models based on ANNs and group contributions were proposed. ► The ANNs predicted density with an average absolute error of 0.14%. ► The group contribution method had reasonable predictability. ► The ANNs had better predictabilities, especially at higher temperatures.

Research paper thumbnail of Prediction of deep eutectic solvents densities at different temperatures

Thermochimica Acta, 2011

Predicting densities of nonconventional solvents like deep eutectic solvents (DESs) as a function... more Predicting densities of nonconventional solvents like deep eutectic solvents (DESs) as a function of temperature is of considerable importance in the development and design of new processes utilizing these solvents. Because of the nature of bonding existing between the salt and the hydrogen bond donor, conventional methods result in very large deviations. In this study, the density of DESs based on three different salts was estimated using empirical method. Nine different salts:hydrogen bond donor combinations were selected to test this method. The densities of all DESs were measured at a temperature range (298.15–368.1 K). The critical properties of salt and hydrogen bond donor were estimated using the Modified Lydersen–Joback–Reid method, while that of the mixture were calculated using Lee–Kesler equation. The Rackett equation modified by Spencer and Danner was employed to predict the DES density. The values of measured and predicted densities were compared and the average of absolute relative error percentage (ARPE) for all DESs was found to be 1.9%. The effect of salt to HBD molar ratio on ARPE in predicted DESs densities was also investigated.▶ An empirical method is introduced to predict deep eutectic solvents densities as function of temperature. ▶ The correlation showed high prediction quality for all tested DESs. ▶ The density of the DESs lies between the densities of the corresponding salt and HBD used in their synthesis. ▶ The relative difference of densities between the DES and the HBD directly affects the quality of density prediction.

Research paper thumbnail of Liquid-liquid equilibria of the ternary system water + acetic acid + 1-hexanol

Journal of Chemical and Engineering Data, 1997

Research paper thumbnail of Electrochemical Generation of Superoxide Ion in Ionic Liquid 1-(3-Methoxypropyl)-1-Methylpiperidinium Bis (Trifluoromethylsulfonyl) Imide

Iop Conference Series: Materials Science and Engineering, 2011

In this work, the superoxide ion was generated and analysed electrochemically using cyclic voltam... more In this work, the superoxide ion was generated and analysed electrochemically using cyclic voltammetry (CV) techniques from oxygen dissolved in a room-temperature ionic liquid, 1-(3-methoxypropyl)-1-methylpiperidinium bis (trifluoromethylsulfonyl) imide, at atmospheric pressure. It was found that the generated superoxide ion was stable which indicates its possible use for further useful applications. To the best of our knowledge, this is the first time a piperidinium based IL has been used for the electrochemical generation of O2.

Research paper thumbnail of Phase equilibria of the ternary system water/acetic acid/2-pentanol

Journal of Chemical and Engineering Data, 1996

Research paper thumbnail of Superoxide Electrochemistry in an Ionic Liquid

Industrial & Engineering Chemistry Research, 2002

Research paper thumbnail of Electrochemical Generation of Superoxide in Room-Temperature Ionic Liquids

Electrochemical and Solid State Letters, 2001

Research paper thumbnail of Synthesis of Carbonyl Compounds From Alcohols Using Electrochemically Generated Superoxide Ions in RTILs

Synthetic Communications, 2012

We show that the superoxide ion (O2•−) generated electrochemically from oxygen dissolved in room-... more We show that the superoxide ion (O2•−) generated electrochemically from oxygen dissolved in room-temperature ionic liquids (RTILs) reacts with primary and secondary alcohols to form the corresponding ketones and carboxylic acids, respectively. Specifically, we study the conversion of benzhydrol to benzophenone and benzyl alcohol to benzaldehyde/benzoic acid. The kinetics (e.g., rate, selectivity, and yield) for these reactions are also determined as functions of the variations in the structure of the ionic liquids. The RTILs used here are imidazolium-based cations where the functional groups on the imidazolium ring are modified. Specifically, 1-butyl-3-methylimidazolium hexafluorophosphate [bmim][PF6], 1-butyl-2,3-dimethylimidazolium hexafluorophosphate [bdmim][PF6], and 1-hexyl-3-methylimidazolium hexafluorophosphate [hmim][PF6] are used as the reaction medium. These results are compared to an ammonium-based RTIL (N-butyl-N-trimethylammonium bis(trifluoromethylsulfonyl)imide). The results show that the nucleophilic attack by the O2•− of both the RTIL and the alcohol, especially that of the H atom at the R2 position of the [bmim][PF6] and [hmim][PF6], greatly affects the yields. No RTIL degradation products were detected for the reactions in [bdmim][PF6] and N-butyl-N-trimethylammonium bis(trifluoromethylsulfonyl)imide ionic liquids. For the benzyl alcohol oxidation reaction in the RTIL, N-butyl-N-trimethylammonium bis(trifluoromethylsulfonyl)imide, benzaldehyde formed did not undergo further oxidation to form benzoic acid, which may be due to the greater hydrophobicity of this RTIL. The competitive reaction kinetics between the alcohol and RTIL component must be considered in the selection of the RTIL solvent system.

Research paper thumbnail of Long term stability of superoxide ion in piperidinium, pyrrolidinium and phosphonium cations-based ionic liquids and its utilization in the destruction of chlorobenzenes

Journal of Electroanalytical Chemistry

Research paper thumbnail of Using Deep Eutectic Solvents for the Removal of Glycerol from Palm Oil-Based Biodiesel

Journal of Applied Sciences, 2010

... Search result page 2552. Title: Using Deep Eutectic Solvents for the Removal of Glycerol from... more ... Search result page 2552. Title: Using Deep Eutectic Solvents for the Removal of Glycerol from Palm Oil-Based Biodiesel. Author: K. Shahbaz ; Farouq. S. Mjalli ; MA Hashim ; Inas. M. ALNashef. Abstract: One of the essential steps ...

Research paper thumbnail of Ethanesulfonic acid-based esterification of industrial acidic crude palm oil for biodiesel production

Bioresource Technology, 2011

An industrial grade acidic crude palm oil (ACPO) pre-treatment process was carried out using etha... more An industrial grade acidic crude palm oil (ACPO) pre-treatment process was carried out using ethanesulfonic acid (ESA) as a catalyst in the esterification reaction. ESA was used in different dosages to reduce free fatty acid (FFA) to a minimum level for the second stage of biodiesel production via alkaline transesterification reaction. Different process operating conditions were optimized such as ESA dosage (0.25–3.5% wt/wt), methanol to ACPO molar ratio (1:1–20:1), reaction temperature (40–70 °C), and reaction time (3–150 min). This study revealed the potential use of abundant quantities of ACPO from oil palm mills for biodiesel production. The lab scale results showed the effectiveness of the pre-treatment process using ESA catalyst. Three consecutive catalyst recycling runs were achieved without significant degradation in its performance. Second and third reuse runs needed more reaction time to achieve the target level of FFA content. Esterification and transesterification using ESA and KOH respectively is proposed for biodiesel industrial scale production. The produced biodiesel meets the international standards specifications for biodiesel fuel (EN 14214 and ASTM D6751).► Acidic crude palm oil is proposed as a raw material for biodiesel production. ► Ethanesulfonic acid is introduced as a new esterification catalyst. ► The acid was recycled for three batches with insignificant lose in efficiency. ► The produced biodiesel meets the international standards for biodiesel fuel.

Research paper thumbnail of A novel method for the synthesis of 2-imidazolones

Tetrahedron Letters, 2010

The superoxide ion electrochemically generated by reduction of oxygen, or chemically generated by... more The superoxide ion electrochemically generated by reduction of oxygen, or chemically generated by dissolving potassium superoxide in ionic liquids, reacts with alkyl imidazolium cations of imidazolium-based ionic liquids at room temperature and atmospheric pressure to give the corresponding 2-imidazolones in excellent yields.The superoxide ion electrochemically generated by reduction of oxygen, or chemically generated by dissolving potassium superoxide in ionic liquids, reacts with alkyl imidazolium cations of imidazolium-based ionic liquids at room temperature and atmospheric pressure to give the corresponding 2-imidazolones in excellent yields.

Research paper thumbnail of Electrochemical reduction of dioxygen in Bis (trifluoromethylsulfonyl) imide based ionic liquids

Journal of Electroanalytical Chemistry, 2011

Electrochemical generation of superoxide ion (O2-) has been investigated in three room temperatur... more Electrochemical generation of superoxide ion (O2-) has been investigated in three room temperature ionic liquids (ILs), based on bis (trifluoromethylsulfonyl) imide anion, [N(Tf)2]−, comprising the following cations N-(3-Hydroxypropyl)pyridinium, [HPPy]+, 1-(3-methoxypropyl)-1-methylpiperidinium, [MOPMPip]+, and 1-hexyl-1-methyl-pyrrolidinium, [HMPyrr]+. Cyclic voltammetry (CV) and chronoamperometry (CA) techniques were used for the analysis of the the electrochemical process. It was found that the generated O2- was not stable in the IL based on pyridinium cation, [HPPy]+. While a stable O2- was electrochemically generated in [MOPMPip]+ and [HMPyrr]+ based ILs. CV and CA techniques were used to determine the diffusion coefficients of O2 and solubility of oxygen in the studied ILs as a function of temperature. The diffusional activation energies were then determined. It was found that [HMPyrr]+ based IL, in general, has higher diffusion coefficient and solubility of O2 and less diffusional activation energy than [MOPMPip]+ based IL. For our best knowledge, this is the first time piperidinium based ILs has been used for the electrochemical generation of O2-.► O2- was stable in [MOPMPip]+ and [HMPyrr]+ based ILs. ► [HMPyrr]+ based IL in general has higher diffusion coefficient, electrical conductivity and O2 solubility than [MOPMPip]+ based IL. ► The density and viscosity for [MOPMPip]+ and [HMPyrr]+ based ILs decreased with temperature.

Research paper thumbnail of A novel technique for separating glycerine from palm oil-based biodiesel using ionic liquids

Fuel Processing Technology, 2010

Biodiesel production from abundant bio-sources has drawn the attention of the academic as well as... more Biodiesel production from abundant bio-sources has drawn the attention of the academic as well as the industrial communities in recent years. However, one of the most serious obstacles for using biodiesel as an alternative fuel is the complicated and costly purification processes involved in its production. The difficulties involved in the separation of glycerine and other un-reacted reactants and by-products necessitate the development of new competent low cost separation processes for this purpose. In this work, a low cost quaternary ammonium salt–glycerine-based ionic liquid is proposed as a solvent for extracting glycerine from the transesterification biodiesel product. The separation technique was tested on palm oil-based produced biodiesel with KOH as a reaction catalyst. The study investigated the effect of DES:biodiesel ratio and the DES composition on the efficiency of the extraction process. The lab scale purification experiments proved the viability of the separation technique with a best DES:biodiesel molar ratio of 1:1 and a DES molar composition of 1:1 (salt:glycerine). The purified biodiesel fulfilled the EN 14214 and ASTM D 6751 standard specifications for biodiesel fuel in terms of glycerine content. A continuous separation process is suggested for industrial scale application.