Influence of temperature and estimation of enthalpy and entropy for reactive extraction of lactic acid | Health & Environmental Research Online (HERO)

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HERO ID

8257652

Reference Type

Journal Article

Title

Influence of temperature and estimation of enthalpy and entropy for reactive extraction of lactic acid

Author(s)

Hussein, HS; Shinde, SN

Year

2012

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Journal

International Journal of Chemical Sciences
ISSN: 0972-768X

Volume

Issue

Page Numbers

1309-1316

Language

English

Abstract

This paper deals with lactic acid extraction by using tri-n-butyl phosphate (TBP) extractant dissolved in diluents (Methyl ether diketone (MIBK), 1-dedocanol & di ethyl ether) at different temperatures range (298, 313, 323, 333 K). Chemical equilibrium experiments have been carried out to investigate the effect of temperature on the extraction efficiency of tri-n-butyl phosphate (TBP) as well as on the equilibrium extraction constant. It was found that distribution coefficient (K D) decreased with increasing the temperature. However, an improved separation of the phases is observed. The extraction equilibrium constants have been determined using a mathematical model of reactive extraction. The apparent enthalpy and entropy of the reactive extraction with systems (TBP/MIBK, TBP/1-dedocanol TBP/di ethyl ether) are also determined.

Keywords

Diluents; Extraction efficiency; Lactic acid; Reactive extraction; Temperature; Tri-n-Butyl phosphate (TBP)