Abstract: A process for purifying sugar containing liquids or solutions, optionally at a sugar mill site, in which the hot sugar liquids are initially contacted with a weakly basic anion exchange resin in the bicabonate form, the salt impurities in the juices being converted to their corresponding bicarbonates, then passing the liquids under pressure through a cation exchange resin in the calcium form to remove alkali metals and then treating the resulting liquids pressure free to bring about the conversion of salts of hardness ions such as calcium bicarbonate in the liquid to insoluble calcium carbonate thereby giving a clarified, deionized and decolorized liquid product which is easily crystallized to a purified crystallized sugar product.