Peanut oil, peanut spice, peanut protein and preparation method thereof

Abstract

The invention provides a novel preparation method of peanut oils, peanut spices and peanut proteins. The method comprises the following steps of: baking dry peanut kernels at high temperature; smashing the baked peanuts by using a roller pulverizer; deeply extracting peanut raw materials through high-low-high pressure changes in an extraction process by using a preferable extraction condition; simultaneously obtaining high-quality peanut oils, peanut spices and peanut proteins in one step through the means of supercritical CO2 extraction, separation and refining. The method is simple in steps and environment-friendly; the prepared peanut oils and peanut spices are good in quality, high in safety and free of toxic and harmful substances such as microorganisms, heavy metals, organic solvents and protein sources; the peanut oils are rich in nutrition and good in mouth feel; the peanut spices are pure and rich in fragrance; the peanut proteins are good in fluidity, are nutritious foods and can also be used for developing and producing high additional-value downstream products such as polypeptides, amino acids and the like.

Description

technical field [0001] The invention belongs to the field of edible oil or fat, and in particular relates to peanut oil, peanut flavor, peanut protein and a preparation method thereof. Background technique [0002] With the development of urbanization in our country, on the one hand, the rural population is decreasing year by year, and the labor force is becoming more and more scarce. On the other hand, the demand for edible vegetable oil in cities is increasing rapidly. In recent years, the safety issues of edible oils and fats have occurred frequently: such as hogwash oil incidents, incidents of carcinogens in oils, etc., making ordinary people often have trouble choosing edible vegetable oils. Therefore, how to produce safe, high-quality, high-quality and low-cost edible vegetable oil has been the goal pursued by many researchers. [0003] Peanuts, also known as peanut kernels and peanuts, are well-known and commonly used fat-rich foods. They are grown and widely used al...

AI Technical Summary

Problems solved by technology

The main disadvantages of the pressing method are low oil yield, high residue oil, unhygienic products, low reuse value of the residue, easy growth of microorganisms in the residue, and the oil may contain trace amounts of toxic protein substances.

The solvent extraction method mainly refers to the use of solvent oil (hexane, etc.) to extract the crushed peanuts at high temperature for a long time, and then obtain peanut oil through complex refining steps such as filtration, decolorization, deacidification, deodorization, dephosphatization, and dehydration. The disadvantages of this method are: the slag is damaged by high temperature and the residual solvent is high, so its reuse value is not high; the production process is complicated and there are serious safety hazards; the production cost is high; there are many organic solvents in the product; there is a lack of raw materials in the oil Inherent functional nutrients (such as vitamin E, phytosterols, phospholipids, carotenoids, etc.), and these functional nutrients have a good health care effect on people and antioxidant functions on products; the taste of oil is poor

[0006] However, when supercritical carbon dioxide is used to directly extract peanuts and other kernels with high oil content, on the one hand, due to the slow infiltration and oozing speed of carbon dioxide in compact kernels, and the combination of oil and kernel protein Because of tightness and other reasons, the extraction speed is very slow and the extraction is difficult to complete according to the existing general extraction methods.

On the other hand, because the raw material contains too much oil, a long extraction time is required, the production efficiency is low, and the production cost is high; in addition, if the raw material is not fully extracted, it is very difficult to refine the slag after extraction

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