Industrial hydrophobic adsorbent screening for the separation of 1-phenylethanol and acetophenone

Ostrihoňová, Marta; Gramblička, Michal; Polakovič, Milan

doi:10.1016/j.fbp.2022.11.009

Cited by 3 publications

(2 citation statements)

References 23 publications

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“…Manufacturers provide specific surface area values in a broad range of 250 m 2 /g to 1100 m 2 /g, with the pore volume varying from 0.2 mL/g to 1.9 mL/g. In our previous work, a clear correlation between the specific pore surface area and adsorption capacity of acetophenone and 1-phenylethanol was observed for the identical group of 17 hydrophobic adsorbents [19]. A positive impact of high pore surface area on the selectivity of acetophenone binding was also observed, albeit this relationship did not have a monotonous trend.…”

Section: Adsorbent Screeningmentioning

confidence: 81%

“…The decisive factor was the highest selectivity of 2,4-DDAL with respect to the main impurity, linoleic acid. The selectivity value of roughly 6 implies that about 80% of linoleic acid can be theoretically removed in the breakthrough of the adsorption phase [19]. However, only a limited separation effect can be achieved during the adsorption phase due to the low selectivity values for other mixture components.…”

Section: Adsorbent Screeningmentioning

confidence: 99%

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Separation of (2E,4E)-deca-2,4-dienal from a Biocatalytic Reaction Mixture Using Hydrophobic Adsorbents

Ostrihoňová,

Antošová,

Dobiašová

et al. 2023

Separations

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Biocatalytic oxidation of a fatty acid preparation by enzymes released from a plant extract provided (2E,4E)-deca-2,4-dienal (2,4-DDAL), a valuable natural aroma. The post-reaction mixture contained several other compounds, from which 2,4-DDAL must be recovered. These included the main by-product trans-2-hexenal (2-HAL) and the unreacted substrate composed mainly of linoleic, palmitic, and oleic acids. The adsorption capacity and selectivity of 17 hydrophobic adsorbents were examined in batch equilibrium experiments. The highest binding capacity for 2,4-DDAL was around 30 mg/g. Due to a large excess of fatty acids in the mixture, the total adsorbed amounts of other components analyzed reached the values up to 150 mg/g. In addition, 2-HAL was always adsorbed more strongly than 2,4-DDAL, whereas fatty acids were mostly not adsorbed as effectively. The best-performing adsorbent, AmberLite FPX66, had a selectivity ratio of 6 for 2,4-DDAL with respect to the key impurity and linoleic acid. Ethanol, isopropanol, and acetone were examined as potential desorbents using batch adsorption experiments on AmberLite FPX66 from 2,4-DDAL solutions in organic solvents. Ethanol was found to be the best choice. Based on the batch equilibrium data, a column elution experiment was performed to purify 2,4-DDAL from the biocatalytic reaction mixture using elution with 96% ethanol.

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Section: Adsorbent Screeningmentioning

confidence: 81%

Section: Adsorbent Screeningmentioning

confidence: 99%