High-quality wheat germ oil and subcritical preparation method thereof

Abstract

The invention relates to high-quality wheat germ oil and a subcritical preparation method thereof, belonging to the field of grain deep processing. The preparation method comprises the steps of implementing enzyme deactivation treatment to wheat germ through microwave, and carrying out subcritical butane extraction, molecular distillation and purification, and decoloring process. The preparation method, which obtains wheat germ oil through subcritical butane extraction, greatly reduces equipment manufacturing cost, and is low in operation cost, relatively short in production cycle, high in relative yield, and low in solvent consumption and energy consumption in a process; the preparation method is strong in operability, environment-friendly, free from pollution and good in safety and repeatability, and can realize mass continuous industrial production. The operation process is performed in an anhydrous environment, and can reduce an oxidation phenomenon of wheat germ oil during processing and guarantee stable nature of the prepared product; the prepared wheat germ oil contains 70-90% of unsaturated fatty acid and more than 90% of vitamin E retention rate.

Description

technical field [0001] The invention relates to a high-quality wheat germ oil and a subcritical preparation method thereof, belonging to the field of grain deep processing. Background technique [0002] Wheat germ is a by-product of flour processing, rich in nutrients such as wheat germ oil, wheat germ protein, trace minerals, vitamins, etc. In foreign countries, wheat germ is known as "the natural treasure house of human nutrition". Wheat germ oil has more than 80% unsaturated fatty acids, of which linoleic acid accounts for more than 50%, and also contains octacosanol, phytosterol, lecithin and some trace physiologically active components such as vitamin B 1 , B 2 , B 6 , iron, calcium, etc., of which vitamin E content is the crown of vegetable oil. Wheat germ oil has obvious biological effects on regulating human blood pressure, reducing the concentration of low-density lipoprotein and total cholesterol in the blood, and preventing the occurrence of cardiovascular and ...

AI Technical Summary

Problems solved by technology

The traditional deacidification process adopts alkali refining deacidification or ordinary physical refining method. The alkali refining deacidification process consumes a lot of reagents and pollution, and the loss of active substances such as vitamin E in the refined oil is serious; the ordinary physical refining method usually adopts distillation deacidification, The disadvantage is that it needs to be processed at high temperature for a long time, so that the edible quality of the oil will be reduced, and some active ingredients in the oil such as vitamin E and sterol will be greatly lost.