Preparative Separation of Xanthophylls from Corn Gluten Meal by Macoroporous Adsorption Resins in Biochemical Engineering

摘要

To purify xanthophylls from corn gluten meal by macoroporous resins, the static adsorption performance and dynamic separation characteristics of different resins have been evaluated. And SD300 resin offers the best adsorption capacity for xanthophylls than the other resins as HZ816, S8, AB8 and D630. Based on sorption isotherms of SD300, the Freundlich equation was found to fit the experimental data more adequately. Then packed bed column with SD300 resin was used to perform dynamic adsorption and desorption tests to optimize the separation process of xanthophylls. Parameters for adsorption were sample solution xanthophylls concentration 128.9μg/ml, processing volume 11 BV, flow rate 1.0 BV/h, temperature 25°C. After being treated with ethyl acetate, the xanthophylls content in the product was increased to 6.1%, with a recovery yield of 74.0%.