Method for extracting wheat germ oil by compression solvent

A technology of wheat germ oil and pressurized solvent, which is applied in the production of fat oil/fat and fat production, can solve the problems of high investment in extraction equipment, untimely and incomplete deactivation of enzymes, etc., so as to reduce solvent consumption, inhibit oxidation, Controls the effect of VE loss

Inactive Publication Date: 2008-02-13
JIANGSU UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0007] In order to overcome the untimely and incomplete inactivation of wheat germ enzymes in the prior art, conventional edible oil extraction and refining methods easily lead to unsaturated fatty acids and V in wheat germ oil. E oxidation and degradation, and supercritical CO 2 Due to the defects of high inv

Method used

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  • Method for extracting wheat germ oil by compression solvent

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The flow rate of the wheat germ separated by the high planar sieve is 15kg / h, the original moisture content is 12.2%, and it is sent to the upper feeding port of the microwave enzyme inactivating equipment by the slide pipe, and then enters the material conveying drum, which has a diameter of 15 cm, a length of 92 cm, and a horizontal inclination of 5 cm. Spend. Turn on the transmission system until the speed is 32 rpm. When the material overflows from the lower outlet, turn on the microwave system, adjust the microwave heating power to 2500w, and adjust the drum speed to 45 rpm to balance the incoming and outgoing materials; The microwave heating temperature is set at 85°C in the system, and then the temperature control system is turned on to measure the material temperature at the material outlet, and the microwave heating power is automatically adjusted by the control system; finally, the air conditioning system is turned on, and the damper is adjusted to remove the d...

Embodiment 2

[0025] The flow rate of the wheat germ separated by the high planar sieve is 21kg / h, and the original moisture content is 12.5%. It is sent to the feed inlet above the microwave enzyme inactivation equipment by the slide pipe, and then enters the material conveying roller in the processing workshop. The diameter of the roller is 15cm, and the length is 92cm. , with a horizontal inclination of 10 degrees. Turn on the transmission system until the rotation speed is 24 rpm. When the material overflows from the lower outlet, turn on the microwave system, adjust the microwave heating power to 2000w, and adjust the drum rotation speed to 38 rpm to balance the incoming and outgoing materials; The microwave heating temperature is set at 70°C in the system, and then the temperature control system is turned on to measure the material temperature at the material outlet, and the microwave heating power is automatically adjusted by the control system; finally, the air conditioning system is...

Embodiment 3

[0028] The flow rate of the wheat germ separated by the square planar sieve is 20kg / h, and the original moisture content is 12.3%. It is sent to the feeding port above the microwave enzyme inactivating equipment by the slide pipe, and then enters the material conveying roller in the processing workshop. The diameter of the roller is 15cm, and the length is 92cm. , with a horizontal inclination of 10 degrees. Turn on the transmission system until the rotation speed is 24 rpm. When the material overflows from the lower outlet, turn on the microwave system, adjust the microwave heating power to 2000w, and adjust the drum rotation speed to 60 rpm to balance the incoming and outgoing materials; The microwave heating temperature is set at 75°C in the system, and then the temperature control system is turned on to measure the material temperature at the material outlet, and the microwave heating power is automatically adjusted by the control system; finally, the air conditioning syste...

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Abstract

The invention discloses a method for preparing wheatgerm oil by pressurized solvent extraction. The process includes the following steps: (1) fresh wheatgerms are separated from a plansifter, and directly sent into a microwave drying machine through a chute, and dried and enzyme-deactivated under low temperature; (2) under 0.2-0.8MPa, a plurality of counter current leachings are conducted on the wheatsgerms undergone microwave processing at Step (1) by using liquefied butane, ethanol or isopropyl-alcohol or other solvents, and then precipitation of the solvents contained in the oil mixtures and wet embryo dregs is conducted under reduced pressure; (3) the solvents vaporized from the oil mixtures and wet embryo dregs are vaporized, and the vaporized solvent gas is then compressed and condensed in a compressor for recycled use; (4) the crude wheatgerm oil adopts conventional winterization, caustic-refining and decolorizing techniques. The invention is capable to reduce solvent consumption, reduce the extraction duration and restrain lipidic oxidation and denaturation of embryo-dreg protein. Besides, the method can be applied to massive industrial production.

Description

technical field [0001] The invention relates to the field of deep processing of agricultural products, in particular to a method for extracting wheat germ oil with a pressurized solvent. Background technique [0002] Wheat germ accounts for about 2 to 3% of the weight of wheat grains and is a by-product of the wheat flour milling industry. Wheat germ contains 8-12% high-quality vegetable oil, including more than 60% linoleic acid and other essential unsaturated fatty acids; E The content is 256-500ppm, which is the natural V in nature. E The food with the highest content, and its physiological activity is to synthesize V E Wheat germ also contains about 30% high-quality protein, including eight kinds of essential amino acids for human body, so wheat germ has high edible value and health care function. [0003] At present, there are mainly three ways to produce wheat germ oil. One is direct pressing, which has a low oil yield, only about 5%, and the oil quality is poor; th...

Claims

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Application Information

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IPC IPC(8): C11B1/10
Inventor 董英徐斌陈国平钱晔张红印敬璞
Owner JIANGSU UNIV
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