| Using Xinluzao No.36 cottonseed oil as raw material, the fatty acid methyl ester(FAME) was synthesized by transesterification.Then FAME was purified by extraction, washing,concentration and reduced pressure distillation. The effect of different treatment method in the process of extraction and washing on the recovery rate of the FAME was studied and the composition of cottonseed oil FAME was analyzed by gas chromatography. The results showed that after being extracted by the same volume of petroleum ether of type II,the cottonseed oil FAME was washed by the same volume of 10% sulfuric acid solution, then repeatedly washed by the same volume of 60℃ water until the pH of the water phase was 7, the recovery rate and yield of cottonseed oil FAME after reduced pressure distillation reached 97.1% and 94.7%,respectively.The cottonseed oil FAME was composed of 0.93% myristic acid methyl ester,25.48% methyl palmitate, 0.62% 9-methyl palmitoleate,1.76% methyl stearate,15.97% methyl oleate and 55.24% methyl linoleate. |
