Preparation of cottonseed protein concentrate by density separation

Based on the density difference between cottonseed kernel and hull,cottonseed protein concentrate was prepared by density separation.The solutions used are K2CO3 and SnCl4 solution.The protein content in product with K2CO3 is higher than that with SnCl4.The cottonseed meal produced with two-phase solvent is dealt with the optimum concentration of K2CO3 solution (43%,mass),the content of protein in product is 75% and the yield of protein is 66%.In addition,when the market cottenseed meal with pre-pressing extraction,and the meal dealt with methanol are handled with K2CO3 solution,The content of protein in product can be improved,but the color is very deep.