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- W2069294793 abstract "Lactic acid (2-hydroxypropanoic acid) was extracted from carbon dioxide-pressurized solutions of calcium lactate using two different water-immiscible solvents: Alamine 336 (a tertiary amine) in chloroform and Amberlite LA-2 (a secondary amine) in 1-octanol. Carbon dioxide pressure ranged from 1 to 31 bar. In single-stage extractions with 0.27 M Alamine 336 in chloroform, a 1:1 feed−solvent ratio, and feed concentrations of calcium lactate of 0.05, 0.14, and 0.30 N, total-lactate distribution ratios of 1.60, 0.68, and 0.38, respectively, were observed at carbon dioxide pressures of 23.2, 21.3, and 21.1 bar. In single-stage extractions with 0.30 M Amberlite LA-2 in 1-octanol, a 1:1 feed−solvent ratio, and feed concentrations of calcium lactate of 0.14 and 0.30 N, total-lactate distribution ratios of 0.92 and 0.58 were observed at carbon dioxide pressures of 12.5 and 13.2 bar. Here we use the term “total lactate” to signify lactic acid plus lactate salt plus lactate complexes in any given phase at equilibrium. There was little or no increase in distribution ratios at higher pressures. Precipitate of calcium carbonate or bicarbonate was observed in some experiments. A system temperature of 25 °C was used." @default.
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- W2069294793 date "1996-01-01" @default.
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- W2069294793 title "Extraction of Lactic Acid from a Calcium Lactate Solution Using Amine-Containing Solvents and Carbon Dioxide Gas" @default.
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- W2069294793 doi "https://doi.org/10.1021/ie950394g" @default.
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