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Method for extracting macadamia nut oil by adopting subcritical extraction technology

An extraction technology, nut oil technology, applied in the field of vegetable oil extraction, can solve the problems of high equipment cost, easy oxidation and deterioration of oil, limited application, etc., and achieve the effect of high extraction efficiency, rich aroma, and clear color

Inactive Publication Date: 2014-06-04
秦广雍 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the hot pressing method is low in cost and easy to operate, it ignores the high content of unsaturated fatty acids in macadamia nut oil and the characteristics of rich active ingredients. Under high temperature treatment, the oil is easy to oxidize and deteriorate, producing harmful substances such as trans fatty acids and oil polymers. The functional components in the oil are destroyed, and the protein denaturation of the obtained cake is serious, most of which are used as feed, and the precious resources are not rationally and fully utilized; the oil yield of the cold pressing method is low; the supercritical fluid extraction is due to the high equipment cost , The production scale is small, which limits its application in actual production

Method used

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  • Method for extracting macadamia nut oil by adopting subcritical extraction technology
  • Method for extracting macadamia nut oil by adopting subcritical extraction technology
  • Method for extracting macadamia nut oil by adopting subcritical extraction technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1 carries out according to the following steps:

[0027] After crushing the dried macadamia nut kernels to about 1mm, weigh 500g and put it in a 5L airtight extraction tank, vacuumize; inject 3L of butane solvent, completely immerse the sample, control the temperature at 45°C, the pressure at 0.45Mpa, and the time for 15min. After the extraction, put the liquid butane solvent containing macadamia nut oil into the evaporation tank, evaporate and desolventize under constant temperature and pressure at 50°C, the vaporized butane is compressed by the compressor, liquefied in the condenser and returned to the solvent tank; Open the extraction tank, take out the macadamia nut kernels, crush them to 80 mesh, put them into a closed extraction tank and repeat the above steps; after the second extraction and desolventization, do not take out the macadamia nut kernels, and proceed directly to the third extraction. After extraction and desolvation, macadamia nut crude oi...

Embodiment 2

[0042] Embodiment 2 carries out according to the following steps:

[0043] After crushing the dried macadamia nut kernels to about 1mm, weigh 300g and place it in a 5L airtight extraction tank, vacuumize; inject 2.8L of propane solvent, completely immerse the sample, control the temperature at 15°C, the pressure at 0.74Mpa, and the time for 25min. After the extraction, put the liquid propane solvent containing macadamia nut oil into the evaporation tank, evaporate and desolventize under constant temperature and pressure at 40°C, the vaporized propane is compressed by the compressor, liquefied in the condenser and returned to the solvent tank; open the extraction tank, take out the macadamia nut kernels, crush them to 80 mesh, put them into a closed extraction tank and repeat the above steps; after the second extraction and desolventization, do not take out the macadamia nut kernels, and proceed directly to the third extraction. After extraction and desolvation, macadamia nut c...

Embodiment 3

[0044] Embodiment 3 carries out according to the following steps:

[0045] After crushing the dried macadamia nut kernels to about 60 mesh, weigh 10kg, put it in a 100L closed extraction tank with stirring blades, and vacuumize it; put 60L of dimethyl ether solvent into it, completely immerse the sample, control the temperature at 25°C, The pressure is 0.61Mpa, the stirring speed is 40r / min, the time is 30min, and the frequency is 2 times. After the extraction was completed, the solvent was removed according to the method in Example 1 to obtain macadamia nut crude oil. The water was removed by vacuum evaporation and filtered to obtain 8.3 kg of macadamia nut product oil, with an extraction rate of nearly 95%.

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Abstract

The invention discloses an extraction method of macadamia nut oil, particularly relates to a method for extracting the macadamia nut oil by adopting a subcritical extraction technology and belongs to the field of extraction of vegetable grease. The method comprises the following steps of extracting dried and crushed macadamia nut oil for multiple times under certain pressure and temperature by utilizing the subcritical extraction technology to obtain high-quality macadamia nut oil, wherein the recovered solvent in the extraction process also can be recycled. The extraction method disclosed by the invention has the advantages that the production efficiency is high; the obtained grease is good in quality, no solvent residue is generated, and the protein of degreased fruit powder is not denatured; the manufacturing cost and the operating cost of the equipment are low, and large-production can be realized. The extraction method is a high-efficiency, low-consumption and environmental-friendly production technology of the macadamia nut oil.

Description

technical field [0001] The invention discloses a method for extracting macadamia nut oil, in particular to a method for extracting macadamia nut oil by using a subcritical extraction technology, and belongs to the field of vegetable oil extraction. Background technique [0002] Macadamia nuts (Macadamia aernifolia F. Muell), also known as macadamia nuts and Queensland chestnuts, belong to the genus Macadamia of the family Longanaceae. Originated in Australia, it has been promoted and planted in 7 provinces (autonomous regions) in South China since it was introduced in my country in 1910, mainly distributed in Yunnan and Guangdong and Guangxi. Macadamia nuts have always enjoyed the reputation of "the king of dried fruits". The nuts are crispy and delicious, with a unique flavor and great nutritional and health value. Nut kernels contain nearly 80% oil, of which the proportion of unsaturated fatty acids is about 80%, and the two monounsaturated fatty acids are mainly oleic ac...

Claims

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Application Information

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IPC IPC(8): C11B1/10
Inventor 庞会利许良陈妙源孔令军卢可可秦广雍黄雪松
Owner 秦广雍
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