Walnut oil extraction process by supercritical carbon dioxide

Abstract

A walnut oil extraction process by supercritical carbon dioxide is disclosed. Walnut oil is prepared by steps of peeling walnut kernels, roasting, smashing, extracting, separating, and the like. The process and equipment procedures are simple. The process adopts supercritical extraction. The process is energy-saving, safe, and pollution-free, and prevents the problems of toxicity and harm to human bodies and environment pollution during the extraction. Compared with traditional processes, the process can protect various nutrition components from being damaged in a squeezing step, so that the oil has characteristics of natural faint scent, original taste and flavour, capability of being green and healthy, and comprehensive nutrition.

Description

technical field [0001] The invention relates to a method for extracting walnut oil, in particular to a process flow for extracting walnut oil with supercritical carbon dioxide, and belongs to the field of food processing. 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 make the hair black and shiny, and has a good effect on premature graying of the hair and dryness. Ancient medical scientists have known the medicinal va...

AI Technical Summary

Problems solved by technology

[0004] In the "Outline of China's Food Structure Reform and Development Plan", walnut oil is listed as edible oil that is strongly advocated and promoted. Now the methods for preparing walnut oil mainly include pressing production process and organic solvent leaching production process. Crude oil has many impurities and needs to be treated by high temperature and chemical methods. If the high temperature time is too long, the product will form sour oil, which is not conducive to human health; steam distillation oil is easy to hydrolyze, so that unsaturated fatty acids are polymerized, which is easy to cause oil The loss and destruction of nutritional and beneficial substances such as vitamin E, carotene, phytosterols and trace elements in the walnut oil will denature the protein, and its water-soluble protein content will decrease significantly, reducing the nutritional value and functional characteristics of walnut oil itself; organic solvent leaching method production The crude oil produced by the process has organic solvent residues, which is not good for human health