| High quality cottonseed oil prepared by winterization-fraction process from the third grade cottonseed oil was introduced. The results showed that the liquid cottonseed oil obtained by winterization-fraction process was clear for more than 11 h in refrigeration test, which reached the refrigeration test requirement of the first grade conttonseed oil of national standard absolutely; comparing with the oil without fraction, palmitic acid of liquid cottonseed oil reduced by 1.81 percent, palmitoleic acid decreased by 0.062 2 percent， stearic acid declined by 0.395 percent, oleic acid increased by 0.17 percent, linoleic acid improved by 1.79 percent and linolenic acid increased by 0.104 9 percent; palmitic acid of solid cottonseed fat increased by 13.19 percent, palmitoleic acid reduced by 0.210 5 percent, stearic acid improved by 1.582 percent, oleic acid declined by 2.02 percent, linoleic acid decreased by 10.85 percent, and linolenic acid reduced by 0.047 6 percent. |
