Single-Component and Binary Adsorption Equilibria of Fructooligosaccharides, Glucose, Fructose, and Sucrose on a Ca-Form Cation Exchanger

Abstract

Fructooligosaccharides (1-kestose, 1-nystose, 1F-fructofuranosylnystose) can be obtained by adsorption separation from their mixtures with fructose, glucose, and sucrose. Fixed-bed adsorption of single saccharides and their binary mixtures on the cation-exchange resin Amberlite CR1320 CA was investigated at the operation temperature of 60 °C and a saccharide concentration range up to 400 g·L−1. All adsorption isotherms obtained by frontal chromatography were linear in this range. The distribution coefficients of the saccharides decreased with their molecular weight, which reflected the key role of the size-exclusion effect of the resin. The binary adsorption equilibria showed that the values of the distribution coefficients of all saccharides besides fructose were slightly lower in the presence of another saccharide.