The based on ion exchange extend fast in the chemistry and technology of food products owing to special advantages tehnical-economic on which they realize. In this study are adduced the applications to the ion exchangers in some technologies from food industry (sugar, milk, juices, fats technology and in oenology). So the separation and the batching of bases and acids, of cations and anions from the food products it realizes highly easy using adequate ionic resins, chelates resins its resins with exchange selective ability and nanomaterials.