Production of highly dry glycerol by solvent-aided melt layer crystallization

Eisenbart, Felix J.; Angermeier, Nadine; Ulrich, Joachim

doi:10.1016/j.jcrysgro.2016.09.001

Cited by 7 publications

(5 citation statements)

References 5 publications

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“…Similarly to the production of highly dry glycerol by Eisenbart et al. , small quantities of 1‐butanol allowed successful separation of glycerol from water. Hence, the use of an excessive amount of 1‐butanol may lead to a state where the viscosity of the solution becomes very high and not favorable for crystallization to take place.…”

Section: Resultsmentioning

confidence: 99%

Solvent‐Aided Crystallization for Biodiesel Purification

et al. 2020

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The application of solvent‐aided crystallization (SAC) is based on the addition of a solvent, here 1‐butanol, to crude biodiesel to catalyze the purification process by separating biodiesel from contaminants via crystallization process. Response surface methodology was applied to optimize the process parameters of SAC, represented by biodiesel purity. The purified biodiesel was analyzed by means of gas chromatography‐mass spectrometry for the composition of the present fatty acid methyl ester (FAME). Under the predicted optimum process conditions within the experimental ranges for the highest biodiesel purity, the predicted biodiesel purity was 99.375 %.

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Section: Resultsmentioning

confidence: 99%

Solvent‐Aided Crystallization for Biodiesel Purification

et al. 2020

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“…Eisenbart et al 6 studied the effect of adding 5−30 wt % of 1butanol on the purification efficiency of layer crystallization for the production of highly dry glycerol. It was shown that the addition of solvent significantly increased the purity of the layer crystallization product compared to crystallization without the use of solvent.…”

Section: Introductionmentioning

confidence: 99%

Effects of Assisting Solvents on Purification Efficiency in the Layer Melt Crystallization of Glycerol

Ila,

Miikki,

Louhi-Kultanen

2024

Crystal Growth & Design

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The efficiency of layer melt crystallization for the selective separation of glycerol from a glycerol−diethylene glycol mixture containing 4 wt % of diethylene glycol was evaluated using solvent-free and solvent-aided approaches. The effect of 1-butanol and the binary solvent of 1-butanol and acetone with a total molar composition of 25 mol % on the crystal growth kinetics and the purity of the final product was studied at different undercooling degrees and crystallization yields. The melting point temperature of the mixtures was predicted by using the modified UNIFAC Dortmund model. The addition of both a single and binary solvents significantly increased the crystal growth rate and purity of the final product compared to crystallization from the solventfree mixture. Additionally, higher crystal growth rates and product purity were observed in the binary solvent system compared to those in the single solvent system at the same degree of undercooling. The second stage of solvent-aided crystallization resulted in glycerol with a purity above 99.5 wt %, depending on the type of solvent used and the rate of crystal growth.

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“…Crystallization is one of the most common and mysterious phase transitions in nature, 1 and it is also one of the main methods for purifying substances, especially in chemical production, 2,3 pharmaceutical preparations, 4 and other fields. Crystallization usually undergoes two major processes: nucleation 5 and growth.…”

Section: Introductionmentioning

confidence: 99%

“…Crystallization is one of the most common and mysterious phase transitions in nature, and it is also one of the main methods for purifying substances, especially in chemical production, , pharmaceutical preparations, and other fields. Crystallization usually undergoes two major processes: nucleation and growth. , Therefore, nucleation is the first step in the crystallization process, which can determine the structure, − morphology, and particle size of the product − and thereby affect the product quality.…”

Section: Introductionmentioning

confidence: 99%

How Structurally Similar Additives Affect the Dimensionless Interfacial Tension for Inducing Nucleation: The Case Study of Succinic Acid

Xu,

Liu,

Zhang

et al. 2023

Crystal Growth & Design

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Additives play a crucial role in regulating metastable zone widths (MSZWs) during the nucleation process, where solid−liquid interfacial tension is one of the important factors. In this work, we explored how glutaric acid, heptanedioic acid, and azelaic acid, as major byproducts, which have similar structures to succinic acid and act as an additive, affected nucleation behaviors of succinic acid. By measuring the MSZWs, classical nucleation theory and the newly defined dimensionless interfacial tension γ eff were employed to evaluate the nucleation ability in the presence of additives. Our results show that when increasing the carbon chain length and concentration of additives, this leads to an increase in the impurity coverage θ and adsorption heat Q diff , which causes γ eff to rise. Therefore, it suppresses the formation of crystal nuclei and leads to an increase in the nucleation energy barrier, which further widens the MSZWs. By using impurities in the production of succinic acid as additives, we highlight that the conception of the dimensionless interfacial tension γ eff may open the door to provide a possible method for evaluating and predicting the effect of additives on the solid−liquid interfacial tension during the nucleation process of succinic acid.

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Production of highly dry glycerol by solvent-aided melt layer crystallization

Cited by 7 publications

References 5 publications

Solvent‐Aided Crystallization for Biodiesel Purification

Solvent‐Aided Crystallization for Biodiesel Purification

Effects of Assisting Solvents on Purification Efficiency in the Layer Melt Crystallization of Glycerol

How Structurally Similar Additives Affect the Dimensionless Interfacial Tension for Inducing Nucleation: The Case Study of Succinic Acid

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