High-quality wheat germ oil and subcritical preparation method thereof

A technology of wheat germ oil and wheat germ, which is applied in the direction of fat oil/fat refining, fat oil/fat production, fat production, etc., can solve the problems of vitamin E active substance loss in finished oil, lower edible quality, and large reagent consumption, etc., to achieve Short production cycle, reduced impact, and high oil purity

Inactive Publication Date: 2014-01-08
JIANGNAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 ordinar...

Method used

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preparation example Construction

[0021] A subcritical preparation method of wheat germ oil, comprising the following steps,

[0022] A. Spread the fresh wheat germ in a microwave container, microwave for more than 3 minutes, and then pulverize the raw materials with a pulverizer;

[0023] B, the pulverized wheat germ powder particles are loaded into the extraction tank, and the solvent butane is added to carry out subcritical fluid extraction;

[0024] C. After extraction, wheat germ crude oil is obtained, and water and other impurities are removed by molecular distillation, and refined wheat germ oil is obtained after decolorization.

[0025] In the step A, the thickness of fresh wheat germ is 1-5cm, microwave treatment is carried out for 3-10min (preferably 3-5min) under the power of 400-800W, and the wheat germ is pulverized by a pulverizer for 5-20s;

[0026] In the step B, the subcritical fluid extraction conditions are, extraction pressure 0.2-1MPa, extraction temperature 5-85°C, extraction time 20-120...

Embodiment 1

[0032] A certain amount of fresh wheat germ was weighed and microwaved at 600W for 3 min, and then pulverized by a pulverizer for 10 s. Weigh 20Kg of processed raw materials in batches, and each batch and extractant—butane are put into the extraction kettle of the subcritical fluid extraction device at a material-to-solute mass-volume ratio (g / mL) of 1:3, and the extraction temperature is 25 ° C. , and the extraction pressure was 0.6MPa for 2 times, 35min each time, to obtain the extract. The wheat germ oil is put into molecular distillation, the distillation temperature is 210°C, the rotation speed is 120r / min, and the feed flow rate is 2mL / min for distillation, and then the refined wheat germ oil is obtained by decolorization process.

[0033] After testing, the inactivation rate of lipase activity of 600W3min microwave treatment was 60.08%, and the enzyme inactivation rate of lipoxygenase was 72.52%. Under the condition of accelerated storage at 37℃ for 30 days, the growth ...

Embodiment 2

[0035] A certain amount of fresh wheat germ was weighed and microwaved at 600W for 3 min, and then pulverized by a pulverizer for 10 s. Weigh 20Kg of processed raw materials in batches, put into the extraction kettle of the subcritical fluid extraction device with the extraction agent—butane at a 1:1 ratio of material to volume (g / mL), and the extraction temperature is 5°C. , under the condition of extraction pressure 0.4MPa, extract once for 25min each time to obtain the extract. The wheat germ oil is put into molecular distillation, the distillation temperature is 200°C, the rotation speed is 100 r / min, and the feed flow rate is 1 mL / min for distillation, and then the refined wheat germ oil is obtained by decolorization process.

[0036] After testing, the inactivation rate of lipase activity of 600W3min microwave treatment was 60.08%, and the enzyme inactivation rate of lipoxygenase was 72.52%. Under the condition of accelerated storage at 37℃ for 30 days, the growth rate o...

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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 ...

Claims

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Application Information

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IPC IPC(8): C11B1/10C11B1/04C11B3/12
Inventor 刘元法杨子丰骞李鸽李进伟张泽玉马啸宇
Owner JIANGNAN UNIV
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