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Method for extracting eucalyptus oil from eucalyptus leaves

A technology of eucalyptus oil and eucalyptol, applied in the field of extraction of natural plant extracts, can solve the problems of low oil yield and low content of eucalyptus crude oil, and ensure high purity, high yield and extraction efficiency. High, the effect of increasing the amount of aroma

Inactive Publication Date: 2019-01-11
TIANJIN NAER BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the oil yield of eucalyptus crude oil is low, and the extracted eucalyptus crude oil contains the required component 1, and the content of 8-cineole is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for extracting eucalyptus oil from eucalyptus leaves, comprising the following steps:

[0032] (i) Preprocessing

[0033] Wash the fresh eucalyptus leaves and dry them in the dark for 5 days;

[0034] Add the dried eucalyptus leaves into a stirring ball mill, and mechanically activate them for 3 min at a rotating speed of 300r / min to obtain eucalyptus leaves powder;

[0035] (ii) Soak in water

[0036] Add purified water and cellulase to the treated eucalyptus leaf powder for soaking. The water level needs to completely submerge the raw materials, and use a stone plate to press on the eucalyptus leaf powder. The soaking time is 6 hours. After soaking, separate the eucalyptus leaf powder and obtain the soaking liquid ; The cellulase is 0.5% of Eucalyptus leaf powder weight.

[0037] (iii) Distillation by heating

[0038] Distill the soaking liquid, heat it to 60°C for 1 hour, then heat it to 78°C for 30 minutes; under the physical action of temperature and d...

Embodiment 2

[0049] A method for extracting eucalyptus oil from eucalyptus leaves, comprising the following steps:

[0050] (i) Preprocessing

[0051] Wash the fresh eucalyptus leaves and dry them in the dark for 10 days;

[0052] Add the dried eucalyptus leaves into a stirring ball mill, and mechanically activate them for 5 minutes at a rotating speed of 500r / min to obtain eucalyptus leaves powder;

[0053] (ii) Soak in water

[0054] Add purified water and cellulase to the treated eucalyptus leaf powder for soaking. The water level needs to completely submerge the raw materials, and press the eucalyptus leaf powder with a stone plate. The soaking time is 11 hours. After soaking, the eucalyptus leaf powder is separated to obtain the soaking liquid ; Described cellulase is 0.9% of eucalyptus leaf powder weight.

[0055](iii) Distillation by heating

[0056] Distill the soaking liquid, heat it to 70°C for 1 hour, then heat it to 85°C for 30 minutes; under the physical action of temperat...

Embodiment 3

[0067] A method for extracting eucalyptus oil from eucalyptus leaves, comprising the following steps:

[0068] (i) Preprocessing

[0069] Wash the fresh eucalyptus leaves and dry them in the dark for 7 days;

[0070] Add the dried eucalyptus leaves into a stirring ball mill, and mechanically activate them for 4 minutes at a rotating speed of 400r / min to obtain eucalyptus leaves powder;

[0071] (ii) Soak in water

[0072] Add purified water and cellulase to the treated eucalyptus leaf powder for soaking. The water level needs to completely submerge the raw materials, and press the eucalyptus leaf powder with a stone plate. The soaking time is 9 hours. After soaking, the eucalyptus leaf powder is separated to obtain the soaking liquid ; Described cellulase is 0.7% of eucalyptus leaf powder weight.

[0073] (iii) Distillation by heating

[0074] Distill the soaking liquid, heat it to 65°C for 1 hour, then heat it to 82°C for 30 minutes; under the physical action of temperatu...

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Abstract

The invention provides a method for extracting eucalyptus oil from eucalyptus leaves. The method comprises the following steps: i) pretreatment; (ii) adding water for soaking; (iii) heat distillation;(iv) oil-water separation; (v) eucalyptus oil crude oil refining; and (vi) eucalyptus oil purification. The method for extracting the eucalyptus oil has the advantages of simple process and simple operation, safety and environmental protection, high extraction efficiency, and low production cost, a solvent can be recycled, The prepared eucalyptus oil has natural and abundant aroma and is well coordinated with the tobacco scent. The eucalyptus oil is added to cigarettes, which increases the amount of cigarette aroma, improves aroma, reduces irritation, and softens smoke. At the same time, an auxiliary agent assisted vacuum batch distillation method is used to purify 1,8-eucalyptol from an eucalyptus oil stock solution. Vacuum distillation can reduce a boiling point of a eucalyptus oil system and ensure that the raw material liquid does not polymerize; and the batch rectification process is simple and flexible to operate. The addition of the auxiliary agent changes the relative volatility between the eucalyptus oil systems, and the separation efficiency is improved.

Description

technical field [0001] The invention belongs to a method for extracting natural plant extracts, in particular to a method for extracting eucalyptus oil from eucalyptus leaves. Background technique [0002] Eucalyptus is a collective name for all species of plants in the three genera of Eucalyptus, Cupcarpa and Corymbus, which are important fast-growing broad-leaved tree species in tropical and subtropical regions. [0003] Eucalyptus oil is the aromatic essential oil secreted by eucalyptus leaf oil gland cells, and it is one of the important export spices in my country. In the international aromatic oil market, eucalyptus oil occupies a very important position, and it is the one with the largest quantity among all kinds of natural essential oils extracted from leaves in the world. Eucalyptus oil not only has an aromatic smell, but also a class of biologically active ingredients, which have the functions of antibacterial, anti-inflammatory, antiseptic and insecticidal and mo...

Claims

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Application Information

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IPC IPC(8): C11B9/02
CPCC11B9/027C11B9/022
Inventor 孙静张荣飞李汝娟
Owner TIANJIN NAER BIOTECH
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