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Thymol synthesis method

A technology of thymol and its production method, which is applied in the field of biomedicine, can solve problems such as low value, and achieve the effects of less by-products, improved quality, and increased production capacity

Active Publication Date: 2014-12-03
HUNAN XIANGYIKANG PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Synthetic menthol is a mixture of various isomers and is of little value

Method used

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  • Thymol synthesis method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1 catalyst preparation

[0024] Weigh 7.2 g of activated carbon and soak it overnight with 30 ml of 15% HNO3 solution, filter and wash with boiling water to remove residual acid until the pH of the system is greater than or equal to 7. The wet activated carbon was dried at room temperature, then placed in an oven at 393K to dry overnight, and then calcined in a muffle furnace at 673-773K for 5 hours, and set aside. Dissolve 18g of nickel nitrate and 0.3g of sodium silicate in an appropriate amount of water and add to the above activated carbon. Stir at room temperature for 30 min. Then the solvent was distilled off under reduced pressure, and the solid was dried in an oven at programmed temperature (300K-400K) for 10h. The dried solid was reduced with hydrogen at 650-720k for 5h, and the Ni / Na2SiO3 catalyst supported by activated carbon was obtained after reduction.

Embodiment 2

[0025] Example 2 Catalyst Preparation

[0026] Weigh 7.5 g of activated carbon and soak it overnight with 30 ml of 15% HNO3 solution, filter and wash with boiling water to remove residual acid until the pH of the system is greater than or equal to 7. The wet activated carbon was dried at room temperature, then placed in an oven at 393K to dry overnight, and then calcined in a muffle furnace at 673-773K for 5 hours, and set aside. Dissolve 25g of nickel nitrate and 0.7g of sodium silicate in an appropriate amount of water and add them to the above activated carbon. Stir at room temperature for 30 min. Then the solvent was distilled off under reduced pressure, and the solid was dried in an oven at programmed temperature (300K-400K) for 10h. The dried solid was reduced with hydrogen at 650-720k for 5h, and the Ni / Na2SiO3 catalyst supported by activated carbon was obtained after reduction.

Embodiment 3

[0027] Example 3 catalyst preparation

[0028] Weigh 7.5 g of activated carbon and soak it overnight with 30 ml of 15% HNO3 solution, filter and wash with boiling water to remove residual acid until the pH of the system is greater than or equal to 7. The wet activated carbon was air-dried at room temperature, then placed in an oven at 393K to dry overnight, and then roasted in a muffle furnace at 673K ​​for 5 hours for later use. Dissolve 25g of nickel nitrate and 0.3g of sodium silicate in an appropriate amount of water and add them to the above activated carbon. Stir at room temperature for 30 min. Then the solvent was distilled off under reduced pressure, and the solid was dried in an oven at programmed temperature (300K-400K) for 10h. The dried solid was reduced with hydrogen at 650k for 5h, and the Ni / Na2SiO3 catalyst supported by activated carbon was obtained after reduction.

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PUM

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Abstract

The invention discloses a thymol synthesis method. The thymol synthesis method comprises the steps of dehydrogenating menthone as the raw material under the action of an active carbon loaded Ni / Na2SiO3 catalyst to produce thymol in one step. Easy separation of the product obtained according to the method from byproducts obtained under the reaction conditions of the method results in the reduction of production cost of the product, expensive catalysts are not needed, the reaction time is short, and the method is environment-friendly.

Description

technical field [0001] The invention relates to a method for synthesizing raw material thymol, which belongs to the field of biomedicine. Background technique [0002] Thymol is also known as thymol and thymol, and its chemical name is 5-methyl-2-isopropylphenol. Thymol has a strong bactericidal effect, and its bactericidal ability is stronger than phenol, and its toxicity is low. It has bactericidal and fungicidal effects on oral mucosa, has antiseptic and local anesthetic effects on dental caries cavity, and is used for disinfection and sterilization of oral cavity and throat, skin ringworm mycosis, actinomycosis and otitis. It can promote the movement of tracheal cilia, which is beneficial to the secretion of tracheal mucus. It is easy to eliminate phlegm and has a bactericidal effect, so it can be used to treat bronchitis and whooping cough. It has a strong killing effect on acarids, 1% solution has a 100% mortality in half an hour, and 0.03% solution kills 100% within...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C39/06C07C37/06B01J23/78
CPCB01J23/78C07C37/06C07C39/06
Inventor 帅放文章家伟王向峰
Owner HUNAN XIANGYIKANG PHARMA
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