Method for extracting soybean oil by twice vacuum flash treatment and enzymolysis

A soybean oil and flash steaming technology, which is applied in the direction of fat oil/fat production, fat oil/fat refining, fat production, etc., can solve the problems of destruction, inability to use low-denatured soybean meal production technology, and the effect of oil extraction rate is not obvious, etc. Achieve the effects of increasing the leaching rate, maintaining functionality and biological activity, and improving protein utilization

Inactive Publication Date: 2018-10-12

安徽德运粮油有限公司

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AI-Extracted Technical Summary

Problems solved by technology

In the common leaching oil production process, the pretreatment adopts the mechanical method to prepare soybean embryos, which destroys the soybean cell structure to a certain extent, but the effect of this method on improving the oil extraction rate is not obvious; the high-temperature extrusion method is adopted. Unde...

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Abstract

The invention discloses a method for extracting soybean oil by twice vacuum flash treatment and enzymolysis. First vacuum flash treatment is carried out on a soybean material after course crushing; the purpose of bursting cell walls is achieved under transient vacuum action and through the aid of the flash steam pressure generated by water in soybean embryonic cells, and fat is accumulated on thesurface layer after the wall bursting treatment. The porosity of the surface layer cells is increased, the leaching rate of grease and protein is improved, and the drying effect is achieved. Then soybean protein and soybean oil are effectively obtained by separation after the enzymolysis treatment, and the protein utilization rate of oil crops is improved. Secondary vacuum flash treatment is carried out on the obtained soybean oil; aldehyde and ketone substances, and free fatty acid generating peculiar smell in the soybean oil are rapidly removed; and meanwhile, the residual water is removed instantaneously. The obtained soybean oil has excellent quality, the loss of natural nutrient components in the soybean is low, the nutritional value is high, and the color reversion does not occur easily.

Application Domain

Fatty-oils/fats refiningFatty-oils/fats production

Technology Topic

NutrientChemistry +13

Examples

Experimental program(1)

Example Embodiment

[0019] Example 1

[0020] A method for enzymatically extracting soybean oil by vacuum flashing twice, comprising the following steps:

[0021] (1) Moisture regulation:

[0022] Coarsely pulverize the peeled soybean flakes. After pulverization, the particle size of soybeans is 200 mesh. Spray distilled water on the surface evenly, and stir while spraying water until the water content of soybeans is 10-14%. Heat until the temperature of soybean material is 75°C;

[0023] (2) Vacuum flash treatment:

[0024] Put the above-mentioned 75°C soybean material in a closed vacuum tank, evacuate to a vacuum degree of 5kPa, pass hot steam into it to make the pressure in the tank reach 0.4MPa, and the temperature reaches 100°C, keep for 50s, and then release the pressure to make the inside of the vacuum tank When the transient vacuum pressure drops to 5kPa, the moisture in the soybean material will flash and evaporate, resulting in a wall burst effect;

[0025] (3) Enzymatic extraction of soybean oil:

[0026] Add water to the above broken soybean powder in a ratio of 1:6, stir and mix evenly to form a mixed solution, adjust the pH of the mixed solution to 9.0, and the temperature to 55°C, then add 2.0% alkaline protease Protex-6L for enzymatic hydrolysis for 3 hours, Heat at 95°C for 15 minutes to inactivate the enzyme, then centrifuge at 4500r/min for 25 minutes to obtain soybean oil and supernatant, adjust the pH of the supernatant to 4.5, centrifuge and precipitate, and obtain soybean protein after drying;

[0027] (4) Secondary vacuum flash treatment:

[0028] After heating the soybean oil obtained above to 95°C, place it in the flash tank connected to the vacuum tank, and when the vacuum is evacuated to 5kPa in the vacuum tank, open the connecting valve so that the flash tank reaches the vacuum pressure condition transiently. , so that the soybean oil is instantly bumped to remove the beany smell and residual moisture. After keeping it for 15 minutes, the soybean oil is obtained after discharging.

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Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

Improve protein utilization

Aspergillus strain capable of achieving high-yield production of protease and application of aspergillus strain in soy sauce

InactiveCN107574125AImprove protein utilizationIncrease profitFungiMicroorganism based processesLaboratory cultureAmino acid content

Owner:CHINA NAT RES INST OF FOOD & FERMENTATION IND CO LTD

Method for extracting soybean oil by twice vacuum flash treatment and enzymolysis

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Examples

Example Embodiment

PUM

Description & Claims & Application Information

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