Preparation method of dihydromyrcenol

A technology of dihydromyrcenol and dihydromyrcene, which is applied in the field of preparation of dihydromyrcenol, can solve the problems of long production cycle and low conversion rate, and achieves the effects of improving yield and shortening production cycle

Inactive Publication Date: 2015-09-23
WUZHOU SONGHUA AROMATIC CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for preparing dihydromyrcenol, which can solve the problems of low conversion rate and long production cycle in the existing preparation process of dihydroterpineol

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The preparation method of this dihydromyrcenol comprises the following steps:

[0021] A. First put 85 parts of 36% acetic acid and 60 parts of water into the reactor and mix evenly, then heat to 80°C;

[0022] B. After step A, add 5 parts of catalyst to the reactor, and keep the temperature of the material in the reactor within the range of 80°C;

[0023] C. After step B, add 100 parts of dihydromyrcene preheated to 80°C in the reaction kettle, and keep the temperature of the material in the kettle at 80°C, and react at constant temperature for 3 hours;

[0024] D. After step C, the product obtained by the reaction is filtered, left to stand for stratification, and distilled under reduced pressure to obtain;

[0025] Wherein, the preparation method of catalyst used in B step is as follows:

[0026] A, put 20 parts of niobic acid with a particle size of 200 mesh into 60% nitric acid, acidify at room temperature for 2 hours, then wash to neutrality;

[0027] B, put th...

Embodiment 2

[0031] The preparation method of this dihydromyrcenol comprises the following steps:

[0032] A. First put 80 parts of 36% acetic acid and 50 parts of water into the reactor and mix evenly, then heat to 120°C;

[0033] B. After step A, add 8 parts of catalyst to the reactor, and keep the temperature of the material in the reactor within the range of 120°C;

[0034] C. After step B, add 100 parts of dihydromyrcene preheated to 120°C in the reaction kettle, and keep the temperature of the material in the kettle at 120°C, and react at constant temperature for 1 hour;

[0035] D. After step C, the product obtained by the reaction is filtered, left to stand for stratification, and distilled under reduced pressure to obtain;

[0036] Wherein, the preparation method of catalyst used in B step is as follows:

[0037] A, put 20 parts of niobic acid with a particle size of 240 mesh into 60% nitric acid, acidify at room temperature for 2 hours, then wash to neutrality;

[0038] B, put...

Embodiment 3

[0042] The preparation method of this dihydromyrcenol comprises the following steps:

[0043] A. First put 90 parts of 36% acetic acid and 55 parts of water into the reactor and mix evenly, then heat to 100°C;

[0044] B. After step A, add 7 parts of catalyst to the reactor, and keep the temperature of the material in the reactor within the range of 100°C;

[0045] C. After step B, add 100 parts of dihydromyrcene preheated to 100°C in the reaction kettle, and keep the temperature of the material in the kettle at 100°C, and react at constant temperature for 2 hours;

[0046] D. After step C, the product obtained by the reaction is filtered, left to stand for stratification, and distilled under reduced pressure to obtain;

[0047] Wherein, the preparation method of catalyst used in B step is as follows:

[0048] A, put 20 parts of niobic acid with a particle size of 230 mesh into 60% nitric acid, acidify at room temperature for 2 hours, then wash to neutrality;

[0049] B, pu...

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PUM

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Abstract

The invention discloses a preparation method of dihydromyrcenol, belonging to the technical field of forestry chemical product preparation. The method comprises the following steps: according to a certain ratio, putting 36% of acetic acid and water into a reaction kettle, mixing evenly, and then heating to 80 DEG C to 120 DEG C; adding a catalyst into the reaction kettle, and keeping the material temperature in the kettle within the range of 80 DEG C to 120 DEG C; adding 100 parts of dihydromyrcenol preheated to 80 DEG C to 120 DEG C in advance into the reaction kettle, keeping the material temperature in the kettle within the range of 80 DEG C to 120 DEG C, and performing thermostatic reaction for one hour to 3 hours; performing filtering, standing layering and reduced pressure distillation on a product obtained by the reaction, thus obtaining the dihydromyrcenol. According to the preparation method of the dihydromyrcenol, by adopting the home-made catalyst and matching with the corresponding raw material ratio, the production cycle of the product dihydromyrcenol is shortened, and the yield of the dihydromyrcenol is improved.

Description

technical field [0001] The invention belongs to the technical field of preparation of forest chemical products, and in particular relates to a preparation method of dihydromyrcenol. Background technique [0002] Dihydromyrcenol, chemical name 2,6-dimethyl-7-octen-2-ol, has a fresh floral and white lemon-like fruity aroma, and is mainly used for the coordination and good stability of the fragrance of daily spices Sex, the amount used in the essence can reach about 20%, and it is a variety with a large amount of turpentine synthetic fragrance. [0003] At present, the indirect hydration method of dihydromyrcene, esterification and saponification of dihydromyrcene is commonly used in industry. This process has the disadvantages of low conversion rate and long production cycle. Contents of the invention [0004] The invention provides a preparation method of dihydromyrcenol, which can solve the problems of low conversion rate and long production period in the existing prepar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C33/025C07C29/04
CPCC07C29/04C07C33/025
Inventor 陈伟强陈键泉苏炳连李战冯玲董俊
Owner WUZHOU SONGHUA AROMATIC CHEM
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