Solubilization of methanol and triglycerides: Unsaturated long‐chain fatty alcohol/medium‐chain alkanol mixed amphiphile systems

Dunn, Robert O.; Bagby, M. O.

doi:10.1007/bf02541480

Cited by 16 publications

(17 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The mechanism of solubilization is either via formation of a microemulsion or a cosolvency process. 4 Solubilization of methanol in triglyceride oils, promoted by alkanols or mixed fatty alcohol/alkanol amphiphile, however, occurred via a co-solvency process rather than as a microemulsion. 4,6 A microemulsion was formed only after water was added to the solubilized system.…”

Section: Introductionmentioning

confidence: 98%

“…4 Solubilization of methanol in triglyceride oils, promoted by alkanols or mixed fatty alcohol/alkanol amphiphile, however, occurred via a co-solvency process rather than as a microemulsion. 4,6 A microemulsion was formed only after water was added to the solubilized system. 6 A nonaqueous microemulsion could also be formed with the amphiphile (alkanol), but under limited conditions.…”

Section: Introductionmentioning

confidence: 98%

“…5,6 Schwab and Pryde 6 examined the effect of medium-chain alkanols (C 4 ±C 14 ) on the solubility of methanol in triolein and soybean oil. Dunn et al 7 and, Dunn and Bagby 4 have studied amphiphile systems consisting of fatty alcohols and mixed fatty alcohol/alkanol, respectively for solubilization of methanol in triolein and soybean oil. Results from these studies showed that all the amphiphile systems dramatically enhanced the solubility of methanol in the oils.…”

Section: Introductionmentioning

confidence: 99%

“…6 A nonaqueous microemulsion could also be formed with the amphiphile (alkanol), but under limited conditions. 4,7,8 Re®ned, bleached and deodorized palm oil (RBD PO), CPO and RBD palm olein (PO L ), are relatively saturated (iodine-value (IV), less than 59) 9 compared with soybean (IV 130) and sun¯ower (IV 136) oils, which have been extensively investigated for use as a biodiesel. 4,6 Therefore, these palm oil products will exhibit different patterns in the isotropic region when mixed with fuel extenders and alkanols.…”

Section: Introductionmentioning

confidence: 99%

“…The viscosity of CPO could be reduced by either blending with diesel fuel, transesteri®cation to form fatty methyl esters or by a solubilization process using short-chain alcohols and amphiphiles. 3,4 Methanol and ethanol as fuel extenders are not very soluble in vegetable oils. However, their solubility can be increased substantially when a suitable amphiphilic compound (surfactant and co-surfactant) is added to the system.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Solubilization of methanol and ethanol in palm oil stabilized by medium‐ and long‐chain alkanols

Dzulkefly

Lim²,

Suhaimi

et al. 2002

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

Solubilization of methanol and ethanol in crude palm oil, re®ned, bleached and deodorized palm oil (RBD PO) and RBD palm olein (PO L ) was studied using medium-and long-chain alkanols (C 4 ±C 12 ). Ternary phase diagrams were constructed to determine the solubilization (isotropic) region. The results showed that methanol and ethanol are solubilized to a greater extent in an unsaturated palm olein than the saturated CPO and RBD PO in the presence of long-chain alkanols. The minima of the solubilization curves for dodecanol, decanol and octanol were 27%, 30% and 33% of alkanol respectively in the methanol system, whereas in the ethanol system, the minima for the same alkanols were found at 22%, 24% and 27%. The longer chain-length alkanol (dodecanol) requires a lesser amount (21% and 32%) to achieve miscibility compared with 53% and 57% for butanol in mixtures containing 70:30 and 50:50 wt ratios respectively. The kinematic viscosity of the isotropic solutions increases with the chain-length and percentage of alkanols. Solubilization using a PO L /methanol/ butanol system signi®cantly reduced the kinematic viscosity of PO L from 72.7 mm 2 s À1 to the value allowable for No 2 diesel fuel (1.9±4.1 mm 2 s À1) or about a 96% reduction from the initial kinematic viscosity of PO L .

show abstract

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Solubilization of methanol and ethanol in palm oil stabilized by medium‐ and long‐chain alkanols

Dzulkefly

Lim²,

Suhaimi

et al. 2002

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

show abstract

Heterogeneous Oil Transesterification in a Single‐Phase Liquid Mixture using a Co‐Solvent for Improved Biofuels Production

et al. 2015

View full text Add to dashboard Cite

CaO is an effective catalyst for the transesterification of vegetable oil with methanol, but reaction rates are lower than with homogeneous catalysts.T riglycerides are poorly miscible in methanol. To decrease the mass transfer resistance,w ei ntroduce ac o-solvent to form as ingle phase solution. The most effective solvents are tetrahydrofuran, ethyl acetate, chloroform, and dichloromethane.U sing these,t he reaction rates are superiort ot he homogeneous catalyst. Both fatty acid methyl ester (FAME) yields and reaction rates were lower for n-heptane and acetone.

show abstract

Aggregation of unsaturated long‐chain fatty alcohols in nonaqueous systems

Dunn

Bagby

1995

J Americ Oil Chem Soc

Self Cite

View full text Add to dashboard Cite

Aggregation and related phenomena in nonaqueous binary and ternary solutions containing unsaturated longchain fatty alcohol arnphiphiles have been studied. Six C18 fatty alcohols were studied--oleyl alcohol (9Z-octadecen-l-ol), elaidyl alcohol (9E-octadecen-l-ol), linoleyl alcohol (9Z, 12Zoctadecadien-1-ol), elaidolinoleyI alcohol (9E, 12E-octadecadien-1-ol), linolenyl alcohol (9Z, 12Z, 15Z-octadecatrien-1-ol) and elaidolinolenyl alcohol (9E, 12E, 15E-octadecatrien-1-ol). Equivalent conductivity and photon correlation spectroscopy confirmed that unsaturated long-chain fatty alcohols form large and polydisperse aggregates in methanol. Critical micelle concentration (CMC) results showed that the degree of unsaturation and configuration of the double bonds in the fatty alcohol significantly influences aggregation. Aggregation of oleyl alcohol in a series of straight and branched medium-chainlength (C3-C 8) alkanol solvents was studied. For shorter-chained alkanols (C1-C4), decreasing solvent dielectric constant decreases the CMC; however, for longer-chained alkanols (C4-C8) , no significant effects occurred on the CMC. The effect of solubilized soybean oil on the viscosity of long-chain fatty alcohol/methanol solutions was also analyzed. Relative viscosity resuits were consistent with those expected for microemulsions. Although preliminary in nature, these results generally support the notion that soybean oil is solubilized by incorporation into large soybean oil-in-fatty alcohol aggregates in methanol solvent, resembling a nonaqueous detergentless microemulsion. JAOCS 72, 123-130 (1995).

show abstract

Solubilization of methanol and triglycerides: Unsaturated long‐chain fatty alcohol/medium‐chain alkanol mixed amphiphile systems

Cited by 16 publications

References 13 publications

Solubilization of methanol and ethanol in palm oil stabilized by medium‐ and long‐chain alkanols

Solubilization of methanol and ethanol in palm oil stabilized by medium‐ and long‐chain alkanols

Heterogeneous Oil Transesterification in a Single‐Phase Liquid Mixture using a Co‐Solvent for Improved Biofuels Production

Aggregation of unsaturated long‐chain fatty alcohols in nonaqueous systems

Contact Info

Product

Resources

About