Process for extracting walnut oil from large walnut kernels through supercritical extraction

Abstract

The invention discloses a process for extracting walnut oil from large walnut kernels through supercritical extraction, belonging to the technical field of deep processing of agricultural products. The process comprises the following steps of: blanching large walnut kernels to remove peels, baking at lower temperature, and carrying out the supercritical extraction to remove partial oil to obtain the walnut oil with high value-added; and subjecting partial degreased walnut kernels to rehydration and baking in a steam fumigating mode so as to ensure that the original shapes and approaching tastes of the walnut kernels are finally maintained; wherein by removing partial oil, the greasy feel generated during eating the walnut kernels is lowered, and products become novel walnut kernel products. The process can be used for effectively controlling the extraction rate of the walnut oil, and is simple in flow, convenient to control, free from environmental pollution and the like, and the walnut oil with high value-added and the degreased walnut kernels can be obtained, the appearance and taste of the walnut kernels are not changed basically with respect to the degreased walnut kernels, and the greasy feel and fat intake amount are reduced for the consumers fond of walnut kernel products.

Description

technical field [0001] The invention relates to the deep processing of agricultural products, and relates to a process for extracting walnut oil from large pieces of walnut kernels, in particular to a supercritical extraction of walnut oil from large pieces of walnut kernels, which basically maintains the original shape of the walnut kernels. Process method of walnut oil. Background technique [0002] my country has extremely rich walnut resources, and walnut kernel has long been recognized at home and abroad as a health-care dried fruit product. Walnut kernel has a sweet and flat taste, warm and moist, and has the functions of nourishing kidney and blood, moistening lung and relieving asthma, moistening intestines and laxative. At the same time, walnut kernel is also a good beauty product for black hair and beauty, moisturizing and anti-aging. Walnut kernels have the effect of strengthening the kidney and nourishing the blood. Therefore, taking walnuts for a long time can ...

AI Technical Summary

Problems solved by technology

Although walnut kernels have great nutritional value for the human body, a large amount of intake increases the fat intake at the same time, and the taste of eating will also feel greasy

[0004] Existing methods for extracting walnut oil mainly contain mechanical pressing, which has low efficiency and yield, poor product quality, and the walnut kernels after oil pressing are all pulverized and cannot form specific products; there are also solvent extractions, Will be mixed with organic solvents, which has a certain impact on human health; CN03145949.8 discloses supercritical CO 2 The method for reversely extracting walnut oil and pine nut oil is characterized in that: the raw material of walnut kernel is washed, mold-removed, dried, extruded and crushed to 20 mesh

Although the oil extraction rate is high, the walnut powder after oil extraction is generally used to produce feed and other by-products, and the added value of the product is low

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