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Preparation method of cineole

A technology of eucalyptol and catalyst, which is applied in the field of synthesis and preparation of eucalyptol, can solve problems such as large amount of waste water, and achieve the effects of less equipment investment, low production cost and no industrial pollution.

Inactive Publication Date: 2017-05-17
YANCHENG CITY CHUNZHU AROMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has a large amount of waste water and produces significant industrial pollution.

Method used

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  • Preparation method of cineole

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Embodiment 1: the preparation of eucalyptol

[0050] The implementation steps of this embodiment are as follows:

[0051] In a round-bottomed flask equipped with a stirrer, condenser, and heat bath jacket, add pine

[0052] Oleyl alcohol, ethanol, and catalyst RND1# are mixed in a weight ratio of 1: 20: 0.1 and stirred evenly under normal pressure. Then react under heating conditions for 20h, and then filter. The filter cake is mixed with terpineol and ethanol at a weight ratio of 1:10 at room temperature for 30 minutes, and suction filtered at a reduced pressure of 0.075~0.095KPa and a temperature of 28°C~30°C. After repeating the above washing operation twice; the filtrates were combined and concentrated at a vacuum pressure of 0.09Kpa and a temperature of 45°C to distill ethanol. The remaining crude product was rectified by a rectification tower. The rectification tower used a glass spring packing with a diameter of 6mm. After vacuum rectification at a reduced pre...

Embodiment 2

[0053] Embodiment 2: the preparation of eucalyptol

[0054] The implementation steps of this embodiment are as follows:

[0055] In a round-bottomed flask equipped with a stirrer, condenser, and heat bath jacket, add pine

[0056]Oleyl alcohol, ethanol, and catalyst RND2# are mixed in a weight ratio of 1: 20: 0.1 and stirred evenly under normal pressure. Then heated to 95 ° under the conditions of reaction for 16h, and then filtered. The filter cake is mixed with terpineol and ethanol in a weight ratio of 1:5 at room temperature for 40 minutes, and then suction-filtered at a reduced pressure of 0.07KPa and a temperature of 30°C. After repeating the above rinsing operation 3 times; the filtrates were combined and concentrated at a vacuum pressure of 0.09Kpa and a temperature of 45°C to distill ethanol. The remaining crude product was rectified by a rectification tower. The rectification tower used a glass spring packing with a diameter of 6 mm. After vacuum rectification at ...

Embodiment 3

[0057] Embodiment 3: the preparation of eucalyptol

[0058] The implementation steps of this embodiment are as follows:

[0059] In a round-bottomed flask equipped with a stirrer, condenser, and heat bath jacket, add pine

[0060] Oleyl alcohol, ethanol, and catalyst RND2# are mixed in a weight ratio of 1: 5: 0.05 under normal pressure and stirred evenly. Then react under the condition of heating at 95° for 16h, and then filter. The filter cake is mixed with terpineol and ethanol at a mass ratio of 1:3 at room temperature for 35 minutes, and suction-filtered at a reduced pressure of 0.01KPa and a temperature of 30°C. After repeating the above rinsing operation 4 times; the filtrates were combined in a vacuum pressure of 0.08Kpa and a temperature of 45°C to concentrate and distill ethanol. The remaining crude product was rectified by a rectification tower. The rectification tower used a glass spring packing with a diameter of 6mm. After vacuum rectification at a reduced pres...

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Abstract

The invention relates to a preparation method of cineole. The preparation method employs terpineol as a raw material, solid acid is used for catalysis, optimization selection is as follows: cineole with high purity is synthesized and separated in a condition at normal pressure with heating. The invention develops a cineole synthesis process which is a green synthesis process with low industrial pollution, low cost and high added values.

Description

[0001] 【Technical field】 [0002] The invention relates to the technical field of food and daily chemical fragrance raw materials. More specifically, the present invention relates to the synthetic preparation method of eucalyptol. [0003] 【Background technique】 [0004] Eucalyptol generally refers to 1,8-cineole, which is an important fine chemical. It is mainly used in the daily necessities and food additive industries as a spice, and it is also used in the medical field because of its bactericidal effect. At present, the main application forms of eucalyptol in the market are divided into two types: eucalyptol oil and eucalyptol. The sales volume of eucalyptol oil is 4 times that of eucalyptol, and the price is indeed 0.5 times that of eucalyptol. The main reason is that the main source of eucalyptus oil is a natural product, which is widely found in the branches and leaves of blue eucalyptus, eucalyptus, camphor tree, camphor tree, etc., and is processed and refined by nat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D493/08
CPCC07D493/08
Inventor 康明娥徐红卫王冠
Owner YANCHENG CITY CHUNZHU AROMA
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