Purification of brown pigment from hazelnut shells with macro-porous resin

The purification of brown pigments from hazelnut shells with macro-porous resin was studied. The static adsorption and desorption performance of 5 kinds of resins for brown pigments from hazelnut shells were compared, and the optimum conditions of the static and dynamic adsorption and desorption for separating brown pigments from hazelnut shells by D101 resin were studied. The results showed that the optimal conditions were:pH=4.0, the dilution of the sample solution of 25 times, the volume of the sample solution of110 mL, best velocity of 1.5².0mL/min, eluting with 70% ethanol, eluting velocity of 1.5².0mL/min. The color value of the pigments raised from 22.3 to 46.8 after adsorpted and purificated by macro-porous resin.