Study on the purification of high-temperature peanut meal protein by the method of alcohol washing

In this experiment,peanut protein was extracted from high-temperature peanut meal by alkali extraction and acid precipitation,and the condition of alcohol washing was optimized by response surface method.Based on the increase of protein content,the effect of alcohol washing on the characteristics of peanut protein had been carried out. It was suggested that the protein content could resch the highest value 79.21% under the following conditions, alcohol concentration 80 %, washing time 180 min, solid- liquid ratio 1 ∶ 15 and washing temperature 50℃. Oil retention of the product was improved by alcohol washing,on the contrary,emulsion,emulsion stability,foaming and foaming stability were significantly lower.