Purification of Monoglycerides From Palm Stearin by Liquid–Liquid Extraction With Aqueous Ethanol

Sánchez, Edwin R.; Pardo-Castaño, Camilo; Bolaños, Gustavo

doi:10.1002/aocs.12018

Cited by 7 publications

(5 citation statements)

References 21 publications

(19 reference statements)

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“…For convenience, the latter substance is denoted hereafter as GMO 40 . The procedure used for GMO 40 purification was suggested by Sanchez et al, 41 and we slightly modified it to better fit our purpose.…”

Section: ■ Introductionmentioning

confidence: 99%

Cold-Burst Method for Nanoparticle Formation with Natural Triglyceride Oils

2021

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Preparation of nanoemulsions of triglyceride oils in water usually requires high mechanical energy and sophisticated equipment. Recently, we showed that α-to-β (viz. gel-to-crystal) phase transition, observed with most lipid substances (triglycerides, diglycerides, phospholipids, alkanes, etc.), may cause spontaneous disintegration of micro-particles of these lipids, dispersed in aqueous solutions of appropriate surfactants, into nanometer particles/drops using a simple cooling/heating cycle of the lipid dispersion (Cholakova et al. ACS Nano 14 (2020) 8594). In the current study we show that this "cold-burst process" is observed also with natural oils of high practical interest, incl. coconut oil, palm kernel oil and cocoa butter. Mean drop diameters of ca. 50 to 100 nm were achieved with some of the studied oils. From the results of dedicated model experiments we conclude that intensive nano-fragmentation is observed when the following requirements are met: (1) The three phase contact angle at the air-water-solid lipid interface is below ca. 30 degrees; (2) The equilibrium surface tension of the surfactant solution is below ca. 30 mN/m and the dynamic surface tension decreases rapidly. (3) The surfactant solution contains non-spherical surfactant micelles. e.g. ellipsoidal micelles or bigger supramolecular aggregates;(4) The three phase contact angle measured at the contact line (frozen oil-melted oil-surfactant solution) is also relatively low. The mechanism(s) of the particle bursting process is revealed and, on this basis, the role of all these factors is clarified and discussed. We explain all main effects observed experimentally and define guiding principles for optimization of the cold-burst process in various, practically relevant lipid-surfactant systems.

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Section: ■ Introductionmentioning

confidence: 99%

Cold-Burst Method for Nanoparticle Formation with Natural Triglyceride Oils

2021

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“…DG and MG production on the industrial scale is carried out by two methodologies: the glycerolysis of triglycerides (TG) and the direct esterification reaction of glycerol and fatty acids [5,6]. These methodologies present some drawbacks such as reaction times between 6 and 24 h for the production of 70 % of MG and DG, high reaction temperatures, leading to products with impurities and of poor quality for the food industry, due to the dark coloration and characteristic burning odor, as well as the use of organic solvents in the separation stages of the products and the use of homogeneous catalysts [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Kinetics of Soybean Oil Hydrolysis on Niobium Catalysts

et al. 2020

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The catalytic hydrolysis of soybean oil was used as an alternative for the production of monoglycerides (MG) and diglycerides (DG). The reactions were conducted in a stainless-steel tubular reactor in the temperature range of 240-290°C, on niobium phosphate (NBP) and niobium oxide (NBO) as catalysts. In the hydrolysis reactions at 270°C, the maximum selectivities of the products of interest were obtained at 22 % MG and 48 % DG for the reaction with NBP, and 7 % MG and 33 % DG with NBO, for 59 % and 36 % of triglyceride conversion in 10 min, respectively. The proposed kinetic model presented a good fit of the theoretical model with the experimental data, showing that the previous hypotheses considered for the mechanism development are suitable for describing the kinetics of soybean oil hydrolysis.

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“…Therefore, purification is needed to separate the glycerol residue from the crude MDAG. MDAG purification could be carried out by Short Path Distillation (SPD) (Rossi et al, 2012;Zhang et al, 2014), solvent extraction (Rumondang et al, 2016;Sanchez et al, 2018), solvent extraction and molecular distillation (Mardaweni et al , 2017), solvent saponification and extraction (Setyaningsih et al, 2016) and creaming demulsification technique (CDT) (Mursalin, Lavlinesia and Yernisa, 2017;Mursalin, Sahrial and Wulandari, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Purifying MDAG using molecular distillation requires a large cost and special expertise to operate it, this method is difficult to apply widely (Sanchez et al, 2018). Purification by solvent extraction also has disadvantages because of the possibility of the remaining solvent in the final product.…”

Section: Introductionmentioning

confidence: 99%

“…Purification by solvent extraction also has disadvantages because of the possibility of the remaining solvent in the final product. In addition, time-consuming and decreasing yield are other disadvantages of this method (Sanchez et al, 2018). Thus, CDT becomes a new method of purifying MDAG which is more efficient than molecular distillation and solvent extraction, especially in separating glycerol residues.…”

Section: Introductionmentioning

confidence: 99%

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Purification engineering of mono-diacylglycerol using creaming demulsification technique in 20 kg-scale

Mursalin¹,

Sahrial²,

Yernisa³

2020

Food Res.

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Glycerolysis is the easiest, cheapest, and most widely used method for producing monodiacylglycerol (MDAG). The crude MDAG resulting from chemical glycerolysis still contains a glycerol residue of more than 7.5% so it needs to be purified. Purification with a simple method using a creaming demulsification technique (CDT) on a laboratory scale has been proven to produce MDAG with a glycerol content of less than 1%. This study was aimed to apply CDT on a scale of 20 kg and determine the process conditions that need to be adjusted so that the results are not different from the laboratory scale. Through trial and error method, the process condition adjustment was done iteratively to produce MDAG glycerol content after purification of less than 1.5%. The initial content of crude MDAG was 12.48%, application of CDT on a scale of 20 kg produces pure MDAG with a glycerol residue content of 3.07% (without adjusting the process conditions) and was 1.15% (with adjusting the process conditions). The adjustments meant include: increasing the operating temperature from 65 to 70°C, changing the type of stirrer from a propeller into a 2-level impeller, applying the nozzle for electrolyte mixing, providing longer skim and cream separation opportunities (applying repeated settling), using 1.5 times more hot water for washing, the washing technique was set twice, the first washing using nozzle without stirring and the second using nozzle with stirring. The adjustments were able to increase the purity of the MDAG produced and has met the European Union and FAO/ WHO standards.

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Purification of Monoglycerides From Palm Stearin by Liquid–Liquid Extraction With Aqueous Ethanol

Cited by 7 publications

References 21 publications

Cold-Burst Method for Nanoparticle Formation with Natural Triglyceride Oils

Cold-Burst Method for Nanoparticle Formation with Natural Triglyceride Oils

Kinetics of Soybean Oil Hydrolysis on Niobium Catalysts

Purification engineering of mono-diacylglycerol using creaming demulsification technique in 20 kg-scale

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