Processing for extracting and purifying eucalyptus oil

A technology of eucalyptus oil and eucalyptol, which is applied in the direction of essential oil/fragrance, fat production, etc., can solve the problems such as not suitable for eucalyptol, achieve saving production and equipment operation costs, flexible operation, and high yield Effect

Inactive Publication Date: 2014-04-02
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the content of the products produced by this device is mostly between 80% and 83%, which is not suitable for the production of high-purity eucalyptol

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: the technology of this eucalyptus oil extraction and purification is to mix the blue eucalyptus eucalyptus crude oil 1000g and ethanol 60g containing 63% 1,8-cineole into the rectification tower still, wherein the amount of auxiliary agent Accounting for 6% of the original liquid volume; turn on the vacuum pump and condensed water, the vacuum degree is 1.0KPa, after the vacuum degree is stable, turn on the heater switch, heat to 50°C, after 30 minutes of full reflux, set the reflux ratio to 20, and start collecting For light components mainly composed of α-pinene, this process lasts for 60 minutes. When the content of α-pinene in the tower still liquid is less than 5%, stop collecting light components; adjust the temperature of the tower still to 65°C, and the reflux ratio is 10 , collect 1,8-cineole, the process continues for 70 minutes, increase the reflux ratio to 16, collect 1,8-cineole, this process continues for 140 minutes, stop collecting, and obtai...

Embodiment 2

[0027] Embodiment 2: the technology of this eucalyptus oil extraction and purification is to mix the straight rod eucalyptus eucalyptus crude oil 1000g and ethanol 80g containing 60% 1,8-cineole into the rectification tower still, wherein the auxiliary agent The volume accounts for 8% of the original liquid volume; turn on the vacuum pump and condensate water, the vacuum degree is 2.0KPa, after the vacuum degree is stable, turn on the heater switch, heat to 55°C, after 30 minutes of full reflux, set the reflux ratio to 25, start Collect light components mainly composed of α-pinene. This process lasts for 80 minutes. When the content of α-pinene in the tower still liquid is less than 5%, stop collecting light components; adjust the temperature of the tower still to 70°C and the reflux ratio to 12 , collect 1,8-cineole, the process continues for 70 minutes, raise the reflux ratio to 18, collect 1,8-cineole, this process continues for 150 minutes, stop collecting; The product of ...

Embodiment 3

[0028] Embodiment 3: the technology of this eucalyptus oil extraction and purification is to mix the blue eucalyptus eucalyptus crude oil 1000g and ethanol 100g containing 58% 1,8-cineole into the rectification tower still, wherein the amount of auxiliary agent Account for 10% of the original liquid volume; turn on the vacuum pump and condensate water, the vacuum degree is 4.0KPa, after the vacuum degree is stable, turn on the heater switch, heat to 65°C, after 30 minutes of full reflux, set the reflux ratio to 30, and start collecting For light components mainly composed of α-pinene, this process lasts for 90 minutes. When the content of α-pinene in the tower liquid is less than 5%, stop collecting light components; adjust the temperature of the tower to 80°C and the reflux ratio to 15 , collect 1,8-cineole, the process continues for 90 minutes, increase the reflux ratio to 20, collect 1,8-cineole, this process continues for 150 minutes, stop collecting; obtain 1,8-cineole Le...

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PUM

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Abstract

The invention discloses a process for extracting and purifying eucalyptus oil. High-purity eucalyptus oil is extracted by performing vacuum intermittent rectification under the assistance of an aid; separating efficiency is increased by changing the thermodynamic property of an eucalyptus oil system in a way of adding an aid under the condition of not greatly changing the conventional rectification process, and high-purity eucalyptol and alpha-pinene serving as a byproduct are extracted by adjusting reflux ratio and tower kettle temperature; and the content of the extracted eucalyptol is higher than 90 percent, and can be up to 96.50 percent in maximum, the yield is over 75 percent, the production period is within six hours, process operation is simple, a production process is stable, a byproduct containing about 80 percent of alpha-pinene is obtained simultaneously, and the added value of crude eucalyptus oil is increased.

Description

technical field [0001] The present invention relates to the separation technology of the high-purity products of natural spice oils, more specifically, relates to a kind of eucalyptus [0002] Process of extracting and purifying leaf oil. Background technique [0003] Eucalyptus oil is an aromatic essential oil secreted by eucalyptus leaf oil gland cells, which is a mixture of various organic components. Eucalyptus oil can be divided into three categories according to its main components and uses: medicine, fragrance and industrial oil. The most important of these is the medical eucalyptus oil, whose main component is 1,8-cineole. [0004] Crude eucalyptus oil, a natural product, has many impurities, among which α-pinene is the main one, and a small amount of β-pinene, myrcene, α-phellandrene, limonene, p-pinene, γ-terpinene , Linalool, etc. A variety of impurities are isomers or molecular structures and molecular weights are very close to 1,8-cineole, and have similar p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11B9/02
Inventor 顾丽莉张健生周梅村黄云华刘佳杜光俊
Owner KUNMING UNIV OF SCI & TECH
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