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A kind of n-butane-ethanol-water two-phase solvent method for extracting vegetable oil at low temperature

A vegetable oil and extraction method technology, which is applied in the direction of fat oil/fat production and fat generation, can solve the problems of high boiling point and unsuitable extraction of edible vegetable oil, and achieve high quality, comprehensive utilization and easy purification.

Inactive Publication Date: 2014-10-08
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hazardous substances such as benzene are likely to remain in hexane solvents, and the boiling point is also high. Methanol is a banned substance in food, so the above two-phase solvents are not suitable for the extraction of edible vegetable oils

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: a kind of method of n-butane-ethanol-water biphasic solvent low temperature extraction vegetable oil, extraction method is as follows:

[0023] Dry the camellia seed, shell it, crush it, and pass through a 20-mesh sieve to obtain the camellia seed kernel powder; place a 1000 mL three-neck flask with a condenser tube and an electric stirrer in a constant-temperature salt water bath, and keep the temperature at -20°C; Add a mixed solvent containing 400 mL of n-butane and 200 mL of ethanol, keep at -20°C for 30 min, then weigh 300 g of Camellia oleifera seed powder, add it to a three-necked flask, connect the condenser to keep the solvent under reflux, and start the stirrer , stirred at 60 r / min, and extracted at -20°C for 45 min. Then, under the condition of -10°C, centrifuge at 4000r / min for 15 minutes, and discard the oil meal; add 20 mL of distilled water to the oil mixture solution after centrifugation, and let it stand for stratification; take the upper...

Embodiment 2

[0024] Embodiment 2, a kind of method of n-butane-ethanol-water biphasic solvent low temperature extraction vegetable oil, extraction method is as follows:

[0025] Dry the Camellia oleifera seeds, shell them, crush them, and pass through a 20-mesh sieve to obtain Camellia oleifera seed kernel powder; place the extraction device in a 1000 mL three-neck flask with a condenser and an electric stirrer in a constant temperature salt water bath, and keep the temperature at -10 ℃, add a mixed solvent containing 660 mL of n-butane and 240 mL of ethanol, keep the temperature at -10 ℃ for 30 min, then weigh 300 g of Camellia oleifera seed powder, add it to a three-necked flask, and connect a condenser to keep the solvent in a reflux state; Start the agitator, stir at 60 r / min, and extract at -10°C for 90 minutes; then, at -10°C, centrifuge at 4000r / min for 15 minutes, discard the oil and meal; put it into the oil mixture solution after centrifugation Add 20 mL of distilled water and le...

Embodiment 3

[0026] Embodiment 3, a kind of n-butane-ethanol-water two-phase solvent extracts the method for vegetable fat at low temperature, and extraction method is as follows:

[0027] Dry soybeans, crush them, and pass through a 20-mesh sieve to obtain soybean powder; place the extraction device in a 1000 mL three-necked flask with a condenser and an electric stirrer in a constant-temperature salt water bath, keep the temperature at -10°C, and add A mixed solvent of 440 mL of alkanes and 160 mL of ethanol was kept at a constant temperature of -10°C for 30 min. Then, 300 g of soybean powder was weighed and added to a three-necked flask, and a condenser was connected to keep the solvent in a reflux state; Stir and extract at -10°C for 90 min; then, at -10°C, centrifuge at 4000r / min for 15 min, discard the oil and meal; add 20 mL of distilled water to the oil mixture after centrifugation, and let stand Layering; take the upper layer of oil solution and place it in a distillation device, ...

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Abstract

The invention relates to a method for extracting vegetable oil at low temperature with n-butane-ethanol-water two-phase solvent. The extraction method includes raw material treatment, precooling, extraction and separation. The n-butane-ethanol-water two-phase solvent method for extracting vegetable oil at low temperature of the present invention utilizes the moisture in the oilseed to form a n-butane-ethanol-water two-phase solvent, which is the "n-butane-ethanol phase" and "ethanol phase" -water box". The "n-butane-ethanol phase" can not only use n-butane to efficiently extract vegetable oils, but ethanol can also extract medium-polarity bioactive substances such as vitamin E in oil plants, which is beneficial to strengthen the health care function of the product vegetable oil. "Ethanol-water phase" can extract polar bioactive substances such as vitamins and polyphenols and other polar natural products in oil. The invention can realize the next extraction operation under normal pressure, complete the extraction of soluble substances of different polarities in the oil, reduce operating procedures, and realize efficient utilization of resources; moreover, the extracted vegetable oil has high quality, less loss of nutritional components, and food safety is guaranteed.

Description

technical field [0001] The invention relates to a method for extracting vegetable oil at low temperature, in particular to a method for extracting vegetable oil at low temperature with n-butane-ethanol-water two-phase solvent, and belongs to the field of grain and oil processing. Background technique [0002] Vegetable oil is an important class of edible oil, generally extracted from the seeds of oil crops, mainly including soybean oil, rapeseed oil, peanut oil, camellia oil, sesame oil and so on. Vegetable oil extraction methods include: pressing method, solvent extraction method, supercritical CO 2 Fluid extraction, aqueous enzymatic method, etc. Due to the maturity of technology and the cost of extraction and other raw materials, currently industrial vegetable oil is mainly produced by pressing method, solvent extraction method or a combination of the two methods. [0003] The pressing method is to use mechanical force to squeeze the vegetable oil out of the oilseeds. It...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11B1/10
Inventor 郑德勇凌宏有常玉玺叶乃兴卢泽湘廖益强
Owner FUJIAN AGRI & FORESTRY UNIV
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