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Method for extracting natural flavor with dimethyl ether

A technology of natural fragrance and dimethyl ether, which is applied in the direction of essential oil/fragrance, fat generation, etc., to achieve the effect of easy promotion, rich particle voids, and increased contact surface

Inactive Publication Date: 2013-05-29
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no relevant report on the extraction of essential oils from aromatic plant materials using dimethyl ether.

Method used

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  • Method for extracting natural flavor with dimethyl ether
  • Method for extracting natural flavor with dimethyl ether
  • Method for extracting natural flavor with dimethyl ether

Examples

Experimental program
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Effect test

Embodiment 1

[0040] a. Pulping: Weigh 50 kg of fresh mint leaves that have been removed from rot and impurities, clean them and put them into a beater, inject 50 kg of clear water, and grind for 0.5 hours to make a slurry;

[0041] b. Slurry drying: put the slurry into the drying box of the vacuum freeze dryer for pre-freezing, the pre-freezing temperature is -30°C, the time is 2h, the vacuum sublimation drying temperature is -25°C, the vacuum degree is -0.09MPa, and it is dried for 5h to obtain Freeze-dried peppermint block 7.5kg, take it out, bag and seal it, and store it in a refrigerator at 4°C for subsequent use;

[0042] c. Spice extraction: Weigh 2 kg of freeze-dried mint leaf block and extract the spice components with 6 kg of dimethyl ether. The operating conditions are extraction temperature 30 ° C, extraction pressure 0.5 Mpa, extraction time 35 min; after the extraction, the dimethyl ether extract After filtering and removing particulate impurities, pump it into the evapor...

Embodiment 2

[0050] a. Pulping: Weigh 50 kg of fresh roses, remove rot and impurities, put them into a beater, inject 75 kg of clear water, and refine for 0.8 hours to make a slurry;

[0051] b. Slurry drying: put the slurry into the drying box of the vacuum freeze dryer for pre-freezing, the pre-freezing temperature is -30°C, the time is 2h, the vacuum sublimation drying temperature is -25°C, the vacuum degree is -0.082MPa, and dried for 5h Finally, 8.2 kg of freeze-dried rose lumps were obtained, which were taken out, bagged and sealed, and stored in a refrigerator at 4°C for subsequent use;

[0052] c. Fragrance extraction: Weigh 2 kg of dry rose block and extract the fragrance components therein with 8 kg of dimethyl ether. The operating conditions are extraction temperature 40°C, extraction pressure 0.7Mpa, and extraction time 50 minutes; after the extraction, the dimethyl ether extract is filtered to remove particulate impurities, and pumped into the evaporation tank, and the mat...

Embodiment 3

[0060] a. Pulping: Weigh 50 kg of cumin seeds, remove rot and impurities, put them into a beater, inject 100 kg of clear water, and grind for 1 hour to make a slurry;

[0061] b. Slurry drying: put the slurry into the drying box of the vacuum freeze dryer for pre-freezing, the pre-freezing temperature is -30°C, the time is 2h, the vacuum sublimation drying temperature is -25°C, the vacuum degree is -0.085MPa, and dried for 5h Finally, 11.4 kg of freeze-dried fennel lumps were obtained, which were taken out, bagged and sealed, and stored in a 4°C freezer for subsequent use;

[0062] c. Fragrance extraction: Weigh 2 kg of freeze-dried fennel lumps and extract the spice components with 10 kg of dimethyl ether. The operating conditions are extraction temperature 40 ° C, extraction pressure 0.8 Mpa, extraction time 50 min; after the extraction is completed, the dimethyl ether extract After filtering to remove particulate impurities, it is pumped into the evaporation tank, and ...

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Abstract

The invention relates to a method for extracting a natural flavor with dimethyl ether, which comprises the following steps: making leaves, fruits, flowers and seeds of aromatic plants into a pulp and freeze-drying the pulp, or cleaning and drying stems, barks and roots of aromatic plants, and pulverizing and granulating; sending the freeze-dried material or pulverized and granulated material into an extraction tank, extracting to obtain an extracting solution by using dimethyl ether as a flavor extracting agent, filtering the extracting solution to remove granular impurities, pumping to an evaporation tank, and separating the extracting solution under reduced pressure with a compressor; and carrying out rough separation on the residues after the separation under reduced pressure, carrying out fine separation with a molecular distillation instrument, and distilling by 2-5 stages to obtain the aromatic essential oil. The invention overcomes the defect of low efficiency in the traditional method and the defect of high cost in the supercritical method; the used dimethyl ether extracting agent is odorless and smellless, so the invention has the advantages of no environment pollution, low price and high extraction efficiency; and the obtained plant essential oil is clear and transparent, contains little wax, and overcomes the defects of high water content, high wax content and high oxidative deterioration tendency in the traditional plant essential oil.

Description

technical field [0001] The invention belongs to the field of extraction of natural flavors, in particular to a method for extracting natural flavors with dimethyl ether. Background technique [0002] Natural spices are extracted from the leaves, stems, bark, fruits, seeds and roots of aromatic plants, which have certain volatility and complex components. The method of extraction is: [0003] 1. Steam distillation method: The advantage of this method is that the process is simple, the cost is low, and it is easy to promote; the disadvantage is that the extraction temperature is high, the time is long, the efficiency is low, and the fragrance of natural spices is greatly affected. [0004] 2. Pressing method: also known as cold grinding method; Su Xiaoyun, Application of pressing method in essential oil extraction, Value Engineering, 2010, Vol. 29, No. 1, involves the method of extracting essential oil from aromatic plant raw materials. In citrus such as tangerine, sweet ora...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B9/02
Inventor 马学毅应卫杨圣华郭胜旭
Owner LANZHOU UNIVERSITY
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