Mid-Autumn Festival is approaching, and walnuts are ripe. Walnuts usually mature between August and October each year, and the picking time is usually between September and November. The picked walnuts should be placed in a cool and ventilated place to dry to remove excess moisture and avoid mold and deterioration. At the same time, the dried walnuts are easier to store and keep fresh. In order to better preserve the value of walnuts, many oil pressing manufacturers and farmers will choose to squeeze walnuts into walnut oil by walnut oil press. There are four types of walnut oil production processes. The first type is the traditional mechanical pressing process; the second type is the pre-pressing-leaching process; the third type is the aqueous extraction process; and the fourth type is the supercritical CO2 extraction process. In addition, there are studies on the microwave extraction process of walnut oil and the preparation process of walnut oil microcapsule technology. At the same time, walnuts are small-volume special oils, and appropriate preparation methods must be selected according to their characteristics to ensure the natural quality of walnut oil while avoiding the denaturation of walnut protein. The first two are commonly used production processes in production, which can meet the above requirements, and the operation process is simple and efficient, suitable for industrial. production.

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