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Method for making onion oil at low temperature

An onion oil, low temperature technology, applied in the field of low temperature preparation of onion oil, can solve the problems of high cost, easy damage to active ingredients, low extraction rate and the like, and achieves the effects of good quality, short extraction period and low solvent consumption

Inactive Publication Date: 2015-06-17
GUIZHOU AEROSPACE WUJIANG MACHINERY & ELECTRICITYEQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, onion oil is mostly prepared by vacuum distillation or pressing, but these methods not only have low extraction rate and high cost, but also easily damage the active ingredients.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0016] The implementation method is as follows: select dry, clean, and smooth fresh onions as raw materials, peel them into pieces, and then wash them with water; put the washed onions into an oven, and dry the onions at a temperature of 55°C for 24 hours; Put the dried onion into a grinder and crush it into 85 mesh onion powder; then put the onion powder into the oven and dry the onion powder at 55°C for 12 hours; the dried onion powder remains in the drying oven Cool naturally to normal temperature; Weigh 2013g of cooled onion powder and put it into the material barrel of the extraction kettle, inject carbon dioxide gas into the extraction kettle, keep the temperature and pressure in the extraction kettle in contact with natural raw materials in the supercritical state of carbon dioxide gas; extraction temperature The temperature is 45°C, the pressure is 25MPa; the flow rate of carbon dioxide gas through the extraction kettle is 180kg / h, and the extraction time is 2.5h, so th...

Embodiment 3

[0018] The implementation method is as follows: select dry, clean, and smooth fresh onions as raw materials, peel them into pieces, and then wash them with water; put the washed onions into an oven, and dry the onions for 24 hours at a temperature of 60°C; Put the dried onion into a grinder and grind it into 88-mesh onion powder; then put the onion powder into the oven and dry the onion powder at 60°C for 12 hours; the dried onion powder remains in the drying oven Cool naturally to normal temperature; Weigh 1968g of cooled onion powder and put it into the material barrel of the extraction kettle, inject carbon dioxide gas into the extraction kettle, keep the temperature and pressure in the extraction kettle in the supercritical state of carbon dioxide gas and contact with natural raw materials; the extraction temperature The temperature is 45°C, the pressure is 30MPa; the flow rate of carbon dioxide gas through the extraction kettle is 200kg / h, and the extraction time is 3h, so...

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Abstract

The invention discloses a method for making onion oil at low temperature, which is characterized in that onion oil is extracted from onion by employing a supercritical carbon dioxide fluid. According to the method, steps of predrying, crushing, drying and cooling are carried out on onion before extraction, extraction temperature is 40-45 DEG C, pressure is 25-45 MPa; flow of carbon dioxide gas through an extraction kettle is 150-200kg / h, and the extraction time is 2-3hours. According to the method, the supercritical carbon dioxide fluid is taken as an extraction solvent; the solvent can be circularly used in a system, and has the advantages of small solvent consumption, low price, and low extraction cost. The extraction period is short in 2-3 hours. The extracted onion oil has the characteristics of good quality, high purity, no peculiar smell, no solvent residues, and no environmental pollution. The method has the advantages of simple process and low energy consumption.

Description

technical field [0001] The invention belongs to the technical field of substance extraction, and in particular relates to a method for preparing onion oil at low temperature. Background technique [0002] Onion oil is amber yellow to amber orange transparent liquid, with a strong pungent and long-lasting onion characteristic aroma and smell, containing sulfur compounds such as diallyl disulfide, dimethyl disulfide, methallyl disulfide, etc. , has a good medical effect on lowering cholesterol. At present, onion oil is mostly prepared by vacuum distillation or pressing, but these methods not only have low extraction rate and high cost, but also easily damage the active ingredients. Contents of the invention [0003] The object of the present invention is to provide a method for preparing onion oil at low temperature, improve the extraction purity, reduce environmental pollution and reduce extraction cost. [0004] Technical scheme of the present invention: [0005] The in...

Claims

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Application Information

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IPC IPC(8): C11B1/10
Inventor 熊清元杨艳妃谭春梅
Owner GUIZHOU AEROSPACE WUJIANG MACHINERY & ELECTRICITYEQUIP
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