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Method for extracting essence oil from red jujubes

A technology of jujube and essential oil, which is applied in the direction of essential oil/spice, fat production, etc., can solve the problems of loss of aroma and flavor, insufficient extraction, low extraction rate, etc., to reduce contact, increase extraction rate of essential oil, and reduce distillation temperature Effect

Pending Publication Date: 2018-10-16
LULIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The extraction rates of these methods are all low, and the extraction of jujube core and jujube skin, which has more beneficial components in red dates, is not sufficient enough
In addition, most of the existing methods require high-temperature treatment, which easily causes the loss of aroma and flavor

Method used

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  • Method for extracting essence oil from red jujubes
  • Method for extracting essence oil from red jujubes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Liquid nitrogen cooling: immerse fresh jujubes in liquid nitrogen for 10 minutes to obtain ultra-cold jujubes.

[0033] (2) Liquid nitrogen freezing and crushing: Put the ultra-cold jujube into the crushing chamber from the hopper of the liquid nitrogen freezing and crushing machine, adjust the temperature of the crushing chamber to be -100°C, crush for 0.5 hours, sieve, collect, and obtain ultra-cold jujube powder .

[0034] (3) Freeze-drying: After cooling the freeze-drying box to -50°C, put the ultra-cold jujube powder into a glass dish and place it in the freeze-drying box; vacuumize to a vacuum degree of 0.7 MPa and keep for 5 hours; heat to 40 ℃, and keep it for 5 hours; return to normal pressure, take out to obtain ultra-cold dried jujube powder.

[0035] (4) Soxhlet extraction: put the ultra-cold dried jujube powder in a cylindrical filter paper tube, and put them together in the extraction tube of the Soxhlet extractor, wherein the extraction tube accepts ...

Embodiment 2

[0038] (1) Liquid nitrogen cooling: immerse the naturally dried red dates in liquid nitrogen for 30 minutes to obtain super-cooled red dates.

[0039](2) Liquid nitrogen freezing and crushing: Put the ultra-cold red dates into the crushing chamber from the hopper of the liquid nitrogen freezing crushing machine, adjust the temperature of the crushing chamber to be -190°C, crush for 2 hours, sieve, collect, and obtain super-cold red dates powder .

[0040] (3) Freeze-drying: After cooling the freeze-drying box to -20°C, put the ultra-cold jujube powder into a glass dish and place it in the freeze-drying box; evacuate to a vacuum of 1MPa and keep for 10 hours; heat to 50°C , and kept for 8 hours; returned to normal pressure, taken out to obtain ultra-cold dried jujube powder.

[0041] (4) Soxhlet extraction: put the ultra-cold dried jujube powder in a cylindrical filter paper tube, and put them together in the extraction tube of the Soxhlet extractor, wherein the extraction tub...

Embodiment 3

[0044] (1) Liquid nitrogen cooling: immerse fresh jujubes in liquid nitrogen for 20 minutes to obtain ultra-cold jujubes.

[0045] (2) Liquid nitrogen freezing and crushing: Put the ultra-cold red dates into the crushing chamber from the hopper of the liquid nitrogen freezing crushing machine, adjust the temperature of the crushing chamber to be -150°C, crush for 1 hour, sieve, collect, and obtain super-cold red dates powder .

[0046] (3) Freeze-drying: After cooling the freeze-drying box to -30°C, put the ultra-cold jujube powder into a glass dish and place it in the freeze-drying box; vacuumize to a vacuum degree of 0.8 MPa and keep for 8 hours; heat to 45 ℃, and keep it for 6.5 hours; return to normal pressure, take out to obtain ultra-cold dried jujube powder.

[0047] (4) Soxhlet extraction: put the ultra-cold dried jujube powder in a cylindrical filter paper tube, and put them together in the extraction tube of the Soxhlet extractor, wherein the extraction tube accepts...

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Abstract

The invention provides a method for extracting essence oil from red jujubes. The method comprises the steps that (1) the red jujubes are dipped into liquid nitrogen and cooled, and ultracold red jujubes are obtained; (2) the ultracold red jujubes are subjected to liquid nitrogen cryogenic grinding treatment, and ultracold red jujube powder is obtained; (3) the ultracold red jujube powder is subjected to freeze-drying treatment, and ultracold dry red jujube powder is obtained; (4) the ultracold dry red jujube powder is subjected to soxhlet extraction, and a red jujube essence oil solution is obtained; and (5) the red jujube essence oil solution is subjected to vaccum distillation, and red jujube essence oil is obtained. The method has the advantages of being high in essence oil extraction rate and strong in characteristic aroma, under the premise that the red jujube essence oil quality is not decreased, the jujube cores, jujube peels and the jujube flesh of the red jujubes are sufficiently utilized, and thus the extraction rate of the essence oil is dramatically improved.

Description

technical field [0001] The invention relates to the field of plant essential oil extraction, more specifically, to a method for extracting essential oil from jujube. Background technique [0002] Jujube is rich in vitamins A, B, C and other essential vitamins and 18 kinds of amino acids and minerals, among which the content of vitamin C (ascorbic acid) is as high as 70 to 80 times that of grapes and apples. However, the storage capacity of red dates is less than about 20% of the total output, the cold storage capacity is about 7%, and the fresh fruit rot rate reaches 20% to 25%. The deep processing technology research of red dates has become an urgent problem to be solved in the industrialization of red dates. Extracting essential oil from jujube is a major development direction at present. [0003] Jujube essential oil is a substance with a special smell and is volatile at room temperature. It is a precious liquid with high medicinal value and health care performance. It c...

Claims

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Application Information

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IPC IPC(8): C11B9/02
CPCC11B9/025C11B9/027
Inventor 李艳芳蔡婷婷武娜高文强王中慧
Owner LULIANG UNIV