A STUDY OF SUGAR COLORANTS THROUGH ION-EXCHANGE AND SALT REGENERATION

In order to study the refinery ion-exchange process for colour removal , some synthetic colourants were passed through a strong base anion ex change resin. The effect of sodium chloride concentration on their sub sequent removal from the resin was also studied. Caramels were retaine d less by the resin than melanoidins or HADP's (hexose alkaline degrad ation products). Melanoidins were the best removed during salt regener ation, but only about 50% of the caramels and HADP's were removed. HAD P's were the major colourants to be fixed irreversibly to the resin.