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A method for extracting natural 4-methylguaiacol from dry distilled cypress

A technology of methylguaiacol and dry distillation, applied in organic chemistry, ether preparation, ether separation/purification, etc., can solve the problems of long residence time, difficult separation, low extraction efficiency, etc., achieve high extraction accuracy, improve Product quality, the effect of improving product yield

Active Publication Date: 2021-11-19
天津芸熙生物技术有限公司
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  • Abstract
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Problems solved by technology

[0003] However, the distillate contains various components such as α-pinene, β-pinene, cedarol, acetic acid phenol, guaiacol, 4-methylguaiacol, p-cresol and m-cresol, etc. The boiling points of these materials are close to each other. Separation is difficult, because olefins have unstable double bonds and are easily oxidatively added, so olefins and phenols can be separated first, but when phenols are distilled, the residence time of the materials in the reactor is too long , prone to aggregation resulting in low extraction efficiency

Method used

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Embodiment Construction

[0020] DETAILED DESCRIPTION Hereinafter, embodiments of the present invention will be described in detail.

[0021] Method for extracting natural guaiacol methyl 4- Kashiwagi in the pyrolysis, comprising the steps of:

[0022] (1) Extraction: The distillation of vegetable oils in cedar extracted, the phenolic compound and a vegetable oil-based compound, thereby yielding a crude phenols;

[0023] (2) a batch distillation under reduced pressure: the step (1) obtained crude phenol in a batch autoclave was purified by distillation under reduced pressure, to give the receiving tank content 7% of 4-methyl guaiacol;

[0024] (3) continuous distillation under reduced pressure: the content of the step (2) was obtained in 7% of 4-methyl guaiacol continuous distillation under reduced pressure in the refining vessel, obtained in the receiving tank content of 99% 4 methyl guaiacol.

[0025] Further, the extraction process is:

[0026] (A) mixing: the vegetable oil with 10% sodium hydroxide wer...

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Abstract

The invention provides a method for extracting natural 4-methylguaiacol from dry distilled cypress, comprising the following steps: (1) extraction: extracting the vegetable oil from dry distilled cypress, extracting phenolic compounds and olefins in the vegetable oil (2) Intermittent vacuum distillation: the crude product of phenols obtained in step (1) is carried out intermittent vacuum distillation in a refining kettle, and a content of 7% 4 is obtained in the receiving tank. -Methylguaiacol; (3) continuous vacuum distillation: the 7% 4-methylguaiacol that obtains in step (2) is carried out continuous vacuum distillation in refining kettle, and content is obtained in receiving tank 99% 4-methylguaiacol, the present invention combines intermittent vacuum distillation and continuous vacuum distillation to rapidly distill the crude product of 4-methylguaiacol through intermittent vacuum distillation, The 4-methylguaiacol is further refined by continuous vacuum distillation, the extraction precision is high, and the product yield is improved.

Description

Technical field [0001] The present invention belongs to the technical field of biological extracts, in particular, it relates to a method for extracting natural Kashiwagi methyl dry distillation of the guaiacol. Background technique [0002] Guaiacol is a white or slightly yellow or colorless to light yellow transparent cleansing oily liquid with special fragrance, scientific name o-hydroxy anisole, glycerol ethers, glycerol ether, guaiacol glycerol ether, o-hydroxy or , present in nature guaiac resin, pine and hardwood carbonized oil, is an important intermediate for fine chemicals, widely used in the synthesis of pharmaceuticals, fragrances and dyes, natural guaiacol from needle trees like cedar dry distillation fraction out, extraction, purification is obtained. [0003] However fraction containing a plurality of components α-pinene, pinene beta], cedrol, phenol acid, guaiacol, 4-methyl guaiacol, p-cresol and m-cresol, etc., close boiling points of these materials, separation ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C41/34C07C43/23
CPCC07C41/34C07C43/23
Inventor 谢占德李欢孙中霞
Owner 天津芸熙生物技术有限公司
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