Abstract:In order to reduce the impurities of brown pigments from northeast walnut shell and improve its color value，type of macroporous resin for purification of pigments was studied and the purification process conditions was researched.The characteristics of adsorption rates and desorption rates of four kinds of macroporous resins （D-101，D-4020，AB-8，NKA-9）to the brown pigment are investigated.The results showed that NKA-9 resin was the suitable resin for purifying the brown pigment.From the above investigations and analysis，the optimized conditions were obtained as 0.1 mg/mL sample concentration of adsorption，pH value 3.0，70%alcohol of the suitable elution agent，the optimized flow rates of adsorption were 2.0 mL/min，the optimized flow rates of desorption were 1.0 mL/min，the consumption of elution agent weren′t less than 3 BV.After purification，purification rate of color value was ahieved 162.81%.