Equilibrium studies of phenylalanine and tyrosine on ion-exchange resins

被引：22

作者：

Moreira, MJA ^{[1
]}

Ferreira, LMGA ^{[1
]}

机构：

[1] Univ Coimbra, Dept Chem Engn, P-3030 Coimbra, Portugal

来源：

CHEMICAL ENGINEERING SCIENCE | 2005年 / 60卷 / 18期

关键词：

ion-exchange; amino acid; equilibrium; resin screening;

D O I：

10.1016/j.ces.2005.03.039

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The ion exchange equilibria of amino acids (phenylalanine and tyrosine) on a strong-acid cation exchanger resin (PK220) and on a strong-base anion exchanger resin (PA316) has been investigated. Based on experimental fixed-bed saturations at constant pH, each of the resins was previously screened of a set of three commercial lots with different physical properties. Overall mass balances from the saturation curves enabled to evaluate the linear isotherm constants and its dependence with pH. An equilibrium model that takes into account energetic heterogeneities in ion exchangers was successfully used to correlate binary and multicomponent data. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：5022 / 5034

页数：13

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