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A method for abstracting peanut oil using above-critical CO* fluid

A supercritical, peanut oil technology, applied in the fields of edible oil/fat, application, food science, etc., can solve the problems of solvent recovery, easy wear and tear of parts, high residual oil content in cakes, and achieves no solvent residue, convenient operation, and extraction. high rate effect

Inactive Publication Date: 2008-04-09
SHANDONG PEANUT RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The pressing method is an extraction method that squeezes the oil out of the oil plant by means of mechanical external force. It has the advantages of simple process, strong adaptability to oil plant varieties, and flexible production. However, the residual oil content of the pressed cake is high, and the pressing process Disadvantages such as high power consumption, easy wear of components such as press bar, easy denaturation of oil, etc.
[0006] The leaching method is a new method of extracting vegetable oils with organic solvents. It has the advantages of high oil yield, low processing cost, and good production environment, but there are also problems such as solvent recovery and solvent residue in the product.

Method used

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  • A method for abstracting peanut oil using above-critical CO* fluid
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Experimental program
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Effect test

Embodiment 1

[0022] The peanut kernels were crushed to 40 mesh, and then the crushed peanut kernels were put into the extraction kettle of the HA221-5-06 supercritical extraction apparatus. The extraction temperature was 40°C, CO 2 The flow rate is 35-40kg / h, the extraction time is 120min, and the extraction pressure is 10Mpa, 15Mpa, 20Mpa, 25Mpa, 30Mpa, and 35Mpa, respectively, to extract peanut oil from peanut kernels, and determine the influence of different pressures on the extraction rate. The results are shown in Figure 1.

[0023] It can be seen from Figure 1 that the extraction rate of peanut oil increases with the increase of pressure, especially when the pressure is 10-20MPa, the rising trend of the extraction rate is more obvious. When the pressure is higher than 20MPa, the extraction rate changes not big. When the pressure is high, the power consumption increases, and the unsafe factors also increase, so the most suitable extraction pressure is 20-25MPa.

Embodiment 2

[0025] The peanut kernels are crushed to 40 meshes, and then the crushed peanut kernels are put into the extraction kettle of the HA221-5-06 supercritical extraction apparatus, and the extraction pressure is 25Mpa, CO 2 The flow rate is 35-40kg / h, the extraction time is 120min, and the extraction temperature is 30°C, 35°C, 40°C, 45°C, 50°C to extract peanut oil, and evaluate the influence of different temperatures on the extraction rate of peanut seed oil. The result is shown in Figure 2.

[0026] Extraction temperature is an important parameter affecting the extraction rate of peanut seed oil. It can be seen from Figure 2 that when the temperature is lower than 35°C, the extraction rate increases with the increase of temperature, and when the temperature is higher than 40°C, the extraction rate Gradually decreases, because below 45 °C, the temperature rise makes the material in supercritical CO 2 The solubility of CO increases, but when the temperature continues to rise, CO ...

Embodiment 3

[0028] Crush the peanut kernels to 40 meshes, and then put the crushed peanut kernels into the extraction kettle of the HA221-5-06 supercritical extraction apparatus, at 20Mpa, 40℃, CO 2 The flow rate is 35-40kg / h, and the extraction time is 30min, 60min, 90min, 120min, 150min to extract peanut seed oil. The results are shown in Figure 3. The extraction rate of peanut seed oil increases with the prolongation of the extraction time, but when the time is extended to 90 minutes, the increase in the extraction rate of the oil is significantly reduced, and when it reaches 120 minutes, the increase in the extraction rate is even smaller. In principle of practicality, 90-120min is the most suitable extraction time.

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Abstract

The invention discloses a method using supercritical CO2 fluid to extract and distill peanut oil, and includes the following steps: comminuting the peanut kernel; extracting and distilling the comminuted peanut kernel by the supercritical CO2 fluid, then the peanut oil is produced. The method has high extraction rate and simple technique. The CO2 is innoxious, odorless, cheap, available, and non-flammable. Using the supercritical CO2 fluid extraction technology to distill can ensure that the product has no solvent residual and the intrinsic nutritious quality of the peanut oil is preserved, and can meet the state peanut oil standard GB1534-2003 without being fined.

Description

technical field [0001] The invention relates to the technical field of vegetable oil production, relates to the use of peanut kernels to produce peanut oil, in particular to the use of supercritical CO 2 Fluid extraction technology extracts peanut oil. Background technique [0002] Peanut is an important oil crop and economic crop in my country. On average during the Tenth Five-Year Plan (2001-2005), the average annual planting area of ​​peanuts in my country is 4.875 million hectares, and the average annual output is 14.268 million tons, respectively accounting for the national oil crop planting area, 33.3% and 48.5% of the total output, occupying an important position in major oil crops such as rapeseed, peanut, sesame, flax and sunflower. Peanut is not only the main source of vegetable oil and protein feed in my country, but also the main economic crop and traditional export agricultural product. Peanut plays an increasingly important role in oil safety, dietary structure...

Claims

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Application Information

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IPC IPC(8): A23D9/02
Inventor 禹山林杨庆利潘丽娟朱凤
Owner SHANDONG PEANUT RES INST
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