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Method for water-phase extraction of peanut oil by utilization of surfactant

A surfactant and aqueous phase extraction technology, applied in the direction of edible oil/fat, application, fat production, etc., can solve the problems of poor stability, high cost, and equipment corrosion, and achieve product safety, mild extraction conditions, and process The effect of environmental protection

Active Publication Date: 2015-12-09
青龙满族自治县众大农业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some methods can be used to improve extraction efficiency and reduce emulsification degree, such as enzymatic method to improve extraction efficiency and salt effect to reduce emulsification, there are still problems such as high cost, poor stability, and high corrosion of salt to equipment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for extracting peanut oil using a surfactant aqueous phase, comprising the following steps:

[0022] (1) Dry the peanut kernels with hot air at 80°C for 40 minutes, and remove the red coat.

[0023] (2) Grind the uncoated peanut kernels into a homogenous slurry with a cyclone mill, add 40mL of 0.2% sodium lauryl sulfate aqueous solution to 10g of peanut pulp, and stir and extract at 40°C for 30min;

[0024] (3) Centrifuge, take out the clear oil layer and emulsified layer, freeze at -18°C for 8 hours, thaw at 50°C for 30 minutes, centrifuge, take the upper clear oil, and weigh.

[0025] The clear oil yield of peanut is 53.84%, while under the same conditions without using sodium lauryl sulfate, the clear oil yield is only 25.57%.

Embodiment 2

[0027] A method for extracting peanut oil using a surfactant aqueous phase, comprising the following steps:

[0028] (1) Dry the peanut kernels with hot air at 80°C for 1 hour, and remove the red coat.

[0029] (2) Use a cyclone mill to pulverize the unreddened peanut kernels into a homogenous slurry, add 50mL of 0.08% sodium lauryl sulfate aqueous solution to 10g of peanut pulp, and stir and extract at 40°C for 40min;

[0030] (3) Centrifuge, take out the clear oil layer and emulsified layer, freeze at -18°C for 10h, thaw at 50°C for 30min, centrifuge, take the upper clear oil, and weigh.

[0031] The clear oil yield of peanut is 59.86%, while under the same conditions without using sodium lauryl sulfate, the clear oil yield is only 29.31%.

Embodiment 3

[0033] A method for extracting peanut oil using a surfactant aqueous phase, comprising the following steps:

[0034] (1) Dry the peanut kernels with hot air at 80°C for 1.5 hours, and remove the red coat.

[0035] (2) Use a cyclone mill to pulverize the unreddened peanut kernels into a homogenous slurry, add 50mL of 0.15% sodium lauryl sulfate aqueous solution to 10g of peanut pulp, and stir and extract at 50°C for 40min;

[0036] (3) Centrifuge, take out the clear oil layer and emulsified layer, freeze at -18°C for 10 hours, and thaw at 50°C for 30 minutes; centrifuge, take the upper clear oil, and weigh.

[0037] The clear oil yield of peanut is 67.13%, while under the same conditions without using sodium lauryl sulfate, the clear oil yield is only 31.38%.

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Abstract

The invention discloses a method for water-phase extraction of peanut oil by utilization of a surfactant. The method comprises steps: peanut skins of peanut kernels are removed, then the peanut kernels are crushed into a unifom slurry, and a peanut slurry is obtained; the peanut slurry is mixed with a surfactant aqueous solution, the mixture is dispersed uniformly, and stirring and extraction are carried out; centrifugation is carried out, an emulsion layer and a clear oil layer are separated, freezing is carried out, after unfreezing is carried out, centrifugation is carried out again, and the upper layer clear oil is taken. When the method is compared with the prior art, the clear oil yield of peanut oil water phase extraction can be raised greatly by utilization of the surfactant sodium dodecyl sulfate. The concentration of sodium dodecyl sulfate used in the method is low, the mass concentration is 0.01%-0.5%, and addition of other inorganic salts is not needed. Sodium dodecyl sulfate is easily available, safe and cheap, and is suitable for food industry application. In addition, organic solvents are not used during the technology process, the product is safe, and the technology is environmentally friendly. Raw materials are not subjected to high temperature baking, extraction conditions are mild, the technology is simple, and the obtained grease does not need refining.

Description

technical field [0001] The invention belongs to the field of vegetable oil extraction, and in particular relates to a method for extracting peanut oil in an aqueous phase using a surfactant. Background technique [0002] With the improvement of people's living standards, the consumption of edible oil remains high, and the main source of edible oil is vegetable oil. The extraction method of existing vegetable oil mostly adopts organic solvent leaching method. Commonly used oil extraction agents are industrial hexane and 6# solvent oil (a mixture of short-chain hydrocarbons). [0003] However, it has been proved that the volatilization of organic solvents in oil extraction production is one of the important sources of air pollution. The increasing pressure of environmental protection makes it necessary to innovate oil extraction technology. In addition, there are solvent residues in the finished oil, which is not beneficial to human health. [0004] Aqueous oil phase extra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B1/10C11B1/04A23D9/02
Inventor 郭玉宝王顺民赵恒海许娜李佳琪
Owner 青龙满族自治县众大农业有限公司
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