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Method for refining and concentrating citrus essential oil

A technology for citrus and essential oils, which is applied in the refining field of natural plant essential oils, can solve the problems of weak competitiveness and low quality, and achieve the effects of improving the fragrance value, prolonging the storage time, and reducing the amount of addition.

Inactive Publication Date: 2012-07-11
ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to propose a kind of citrus peel, which is mainly produced in my country as raw material, which can be produced at low temperature and without solvent addition, aiming at the defects that the characteristic citrus essential oils in our country are all primary products, low in quality and not strong in competitiveness. Preparation method of refined and concentrated product of citrus essential oil enriched by 5-20 times relative content of terpene oxides

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: (preparation method 1 of refining and concentrating Wenzhou satsuma citrus essential oil)

[0028] (1) Preparation of crude essential oil: at room temperature, fresh Wenzhou satsuma peels are pressed with a stick press, and water is sprayed at the same time to obtain a mixture of oil, water and granular debris, which is left to stand and filtered to remove After the debris, centrifuge the oil-water mixture at a speed of 1,2000r / min, absorb the upper oil layer and let it stand at -18°C. After the wax precipitates, filter it. The filtrate is the crude essential oil of Wenzhou satsuma;

[0029] (2) Degassing of crude essential oil: Pour the raw material of crude essential oil into the material bottle of the molecular distillation apparatus, close all valves connecting the molecular distillation system with the outside world, open the condensed water, add liquid nitrogen into the cold trap, and start the vacuum pump Degas the raw materials until no bubbles esc...

Embodiment 2

[0032] Embodiment 2: (preparation method 2 of refining and concentrating of Ponkan essential oil)

[0033] In this example, step (1) takes fresh ponkan peels to prepare ponkan crude essential oil; step (3) sets the evaporation surface temperature to 30°C, vacuum degree to 700pa, flow rate to 3mL / min, and rotational speed to 100r / min; step (4) to When the content of terpene oxides such as linalool, terpineol, citronellol, citronellyl acetate, decanal, and citronellal in the distillate is concentrated to 5 times, it becomes the ponkan concentrated essential oil product; Same as embodiment 1.

Embodiment 3

[0034] Embodiment 3: (preparation method 3 of refining and concentrating of grapefruit essential oil)

[0035] In this example, step (1) takes fresh citrus huyou peel as raw material, first removes the white skin layer with an orange peel layering machine and then squeezes it to prepare the crude essential oil of huyou; step (3) sets the evaporation surface temperature 45°C, vacuum degree 500pa, flow rate 2mL / min, rotation speed 250r / min; step (4) when terpineol, octanol, citronellal, citronellyl acetate, citronellone and other terpene oxides in the distillate When the content is concentrated to 10 times, it becomes the ponkan concentrated essential oil product; the rest of the steps are the same as in Example 1.

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Abstract

The invention discloses a method for refining and concentrating citrus essential oil, which belongs to the technical field of natural plant essential oil refining and includes 1 preparation of crude essential oil; 2 degassification of the crude essential oil; 3 molecular distillation of the crude essential oil; 4 quality inspection of concentrated essential oil and other steps. The molecular distillation technology is used for refining and concentrating the citrus essential oil, heat-sensitive components in the essential oil can be protected effectively, no additive is added, and solvent is free of residue. The method achieves efficient separation of terpene compounds and terpene oxides in the citrus essential oil, enables relative content of residual oxides after distillation to be increased to 5-20 times of that of original oxides, and remarkably improves aroma value of the essential oil. Product aroma is strong and fresh, and characteristic aroma is remarkable. The method can be popularized and applied in citrus production places and related enterprises.

Description

technical field [0001] The invention relates to the technical field of refining natural plant essential oils, in particular to a method for improving the fragrance and quality of citrus essential oils by molecular distillation technology. Background technique [0002] Citrus essential oil is the most productive natural spice essential oil in the world. It mainly exists in the oil cell layer of the exocarp of citrus fruits and is an important by-product of the citrus processing industry. Citrus essential oils have a sweet and refreshing smell and a pleasant aroma. They can improve the taste of related products and improve olfactory comfort. They are widely used in the food and daily chemical industries. In addition, citrus essential oil has a good nerve soothing effect and a certain sedative effect, and has antibacterial and anti-inflammatory effects. Scars, dissolving gallstones, has good application prospects in the healthcare industry. [0003] There are dozens to hundre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B9/02
Inventor 杨颖陆胜民陈剑兵邢建荣郑美瑜张俊
Owner ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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