Cold-pressing extraction method of grape seed oil

Abstract

The invention relates to a cold-pressing extraction method of grape seed oil. The cold-pressing extraction method is characterized in that the natural nutrition components of the grape seed oil are completely retained in the grape seed oils extracted by using the cold-pressing method, functional nutrition components such as unsaturated fatty acid and the like in the grape seed oil are protected, the extraction process of the grape seed oil is simplified, and the problems that a solvent of a product is remained and grease and oil cake bioactive components and the like are destroyed are avoided; and in the production process, any chemical reagent and chemical substance such as artificially synthesized pigment, spice, preservative and the like are not added. The grape seed oil obtained by using the cold-pressing extraction is natural faint yellow or faint green and has the characteristic of high nutrition value and is natural and non-toxic. The cold-pressing extraction method comprises the following operation steps: (1) harvesting grape brewing peel pomaces, and drying the peel pomaces through infrared heating; (2) screening the grape brewing peel pomaces, separating and sorting so as to obtain qualified grape seeds; (3) extracting out the grape seed oil by hydraulic pressure cold-pressing; (4) filtering, bottling or packaging the grape seed oil in capsules; and (5) storing.

Description

1. Technical field: [0001] The invention relates to a method for extracting grape seed oil, in particular to a cold extraction method of grape seed oil [0002] Squeeze extraction method. 2. Background technology: [0003] In recent years, my country's wine industry has shown a good development trend, and its output has continued to increase. According to statistics from the National Bureau of Statistics, in 2009, my country's wine output was 960,000 tons. As wine production increases, so do the by-products of grape winemaking. The seed yield rate of grapes is 8% to 10%, and the stalk and skin are 20% to 25%. A wine company with an annual output of 10,000 tons produces hundreds of tons of grape seeds and thousands of tons of grape pomace every year. Grape seeds are extremely rich in grape seed oil, which is about 14% to 17% of the dry weight of grape seeds. Grape seed oil contains palmitic acid, oleic acid, linoleic acid and trace amounts of linolenic acid, lauric acid, m...

AI Technical Summary

Problems solved by technology

The grape seed oil extracted by solvent extraction has a certain degree of solvent residue, which brings certain hidden dangers to food safety; while the traditional pressing method extracts grape seed oil under high temperature conditions, and the high pressing temperature destroys the grape seed oil. The effective nutrients contained in it, especially the bioactive ingredients

At present, there are many problems in the grape seed oil in the domestic market, such as: grape seed oil has peculiar smell, the color is turbid and not clear enough, and the refining process has caused serious loss of nutrients in grape seed oil

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