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7857225 
Journal Article 
Parametric Analysis of Mandelic Acid Separation from Aqueous Solutions by Using Secondary Amine Mixture (Amberlite LA-2) in Various Diluents 
Jing, Y; Xin, Yu; Kiris, B; Asci, Y 
2019 
Yes 
Journal of Chemical and Engineering Data
ISSN: 0021-9568
EISSN: 1520-5134 
AMER CHEMICAL SOC 
WASHINGTON 
64 
8 
3331-3336 
English 
WOS:000480501100052 
Mandelic acid (MA) an α hydroxycarboxylic acid found in bitter almonds. It has gained importance in recent years, especially due to its use in the cosmetic industry. Separation processes of mandelic acid have a critical point in the production stages obtained the product form. In this study, extraction of mandelic acid from aqueous solutions was carried out using five different concentrations of Amberlite LA-2 (LA2) solution. Dimethyl phthalate (DMP), methyl isobutyl ketone (MIBK), 2-octanone, 1-octanol, n-pentane, octyl acetate, and toluene were used as diluents in the organic phase. The batch extraction results of mandelic acid were obtained for process design. The data were analyzed with respect to loading factor (Z), distribution coefficient (D), and extraction efficiency (E). In addition, the overall extraction constants, K11, K12, K13, and K23 have been determined for acid-amine complex. The maximum removal of mandelic acid in this study is 92.75% with MIBK and 0.57 mol·kg-1 initial concentration of Amberlite LA-2. © 2019 American Chemical Society.