Method for simultaneously extracting peanut oil and peanut albumen powder at low temperature

Abstract

The invention relates to the technical field of the preparation of peanut grease and albumen powder, in particular to a method for extracting peanut oil and peanut albumen powder by low temperature cold pressing. The method for simultaneously extracting peanut oil and peanut albumen powder at the low temperature comprises the following steps of cleaning and screening, low temperature drying, peeling, first crushing, tempering, second cold pressing, second crushing, third crushing, filtering, blending and adding flavor substances; the temperature of peanuts in the cold pressing process keeps 40 to 50 DEG C; and after the second cold pressing, the residual oil rate of the peanut meal is 2-3%. The method solves the problems of low grease extraction rate, high residual oil rate, bad peanut oil flavor and serious peanut albumen denaturation in the existing peanut oil extraction technology. The method has the advantages that the production technology is simple and easy to master and has low production cost; the nutritional ingredient of the obtained peanut oil is not destroyed; the peanut oil has better quality and thicker flavor; and the obtained peanut albumen powder is barely denatured and has low fat content.

Description

technical field [0001] The invention relates to the technical field of preparation of peanut oil and protein powder, in particular to a method for extracting peanut oil and peanut protein powder by low-temperature cold pressing. Background technique [0002] Peanut is an important oil crop and economic crop in my country. The sown area of ​​peanuts in China accounts for 20% of the world's peanut sown area, but the total output stands at more than 40% of the world's peanut production, and the peanut export volume accounts for more than 45% of the international peanut trade. Therefore, my country's peanut occupies a pivotal position in the world's peanut production, trade and processing. Peanuts are high in protein and unsaturated fatty acids, rich in vitamins A, B, C, E, etc., and contain Ca, P, Fe, Zn, K and other mineral elements that are beneficial to the human body, especially peanuts The types and quantities of amino acids in protein are rich. The essential amino acids a...

AI Technical Summary

Problems solved by technology

However, because the pressing method is generally high-temperature pressing to make oil, the peanuts must be heated to 120-140 degrees, steamed and fried for 40-60 minutes, and the temperature of the raw materials is as high as 200-240 degrees during extrusion. severe damage, which greatly affects the nutritional quality of the product. At the same time, the peanut protein is severely denatured, and the denatured peanut protein cannot be effectively used, resulting in a great waste of resources.

Although some enterprises use low-temperature pressing to prepare peanut oil, the extraction rate of oil is low, the residual oil rate is high, and the aroma of peanut oil is poor, which makes it difficult to popularize low-temperature pressing technology.