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Method for preparing natural vanillin by utilizing eugenol

A technology of vanillin and eugenol, which is applied in the field of preparing natural vanillin from eugenol, can solve the problems of unstable quality and low process yield, and achieve the effects of easy scale-up production, good quality and high yield

Inactive Publication Date: 2014-03-19
EAST CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current process for preparing vanillin has low yield and unstable quality

Method used

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  • Method for preparing natural vanillin by utilizing eugenol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A method for preparing natural vanillin from eugenol, the process steps are:

[0016] 1. Preparation of Isoeugenol Potassium Salt

[0017] In a clean and dry three-necked flask equipped with a reflux device, add 25 milliliters of eugenol, heat up to 95°C, stir magnetically, and add 16 milliliters of 50% KOH solution dropwise. Continue stirring at ℃ for 3 hours to obtain a yellow-black viscous solution, which is isoeugenol potassium salt;

[0018] 2. Preparation of the Intermediate Vanillin Potassium Salt

[0019] Continue to add 10 grams of deionized water and 100 grams of 30% KOH solution to the three-necked flask, the solution turns yellow, slowly lower the temperature to room temperature, stir quickly to dissolve the oil in the solution, and then add 24 grams of Potassium ferrate was stirred magnetically for 25 minutes at normal temperature to obtain the intermediate product vanillin potassium salt;

[0020] 3. Preparation and purification of the target product va...

Embodiment 2

[0023] A method for preparing natural vanillin from eugenol, the process steps are:

[0024] 1. Preparation of Isoeugenol Potassium Salt

[0025] In a clean and dry three-necked flask equipped with a reflux device, add 25 milliliters of eugenol, heat up to 95°C, stir magnetically, and add 16 milliliters of 55% KOH solution dropwise. Continue stirring at ℃ for 3 hours to obtain a yellow-black viscous solution, which is isoeugenol potassium salt;

[0026] 2. Preparation of the Intermediate Vanillin Potassium Salt

[0027] Continue to add 10 grams of deionized water and 100 grams of 32% KOH solution to the three-necked flask, the solution turns yellow, slowly lower the temperature to room temperature, stir quickly to dissolve the oil in the solution, and then add 24 grams of Potassium ferrate was stirred magnetically for 30 minutes at room temperature to obtain the intermediate product vanillin potassium salt;

[0028] 3. Preparation and purification of the target product vani...

Embodiment 3

[0031] A method for preparing natural vanillin from eugenol, the process steps are:

[0032] 1. Preparation of Isoeugenol Potassium Salt

[0033] In a clean and dry three-necked flask equipped with a reflux device, add 25 milliliters of eugenol, heat up to 95°C, stir magnetically, and add 16 milliliters of 60% KOH solution dropwise. Continue stirring at ℃ for 3 hours to obtain a yellow-black viscous solution, which is isoeugenol potassium salt;

[0034] 2. Preparation of the Intermediate Vanillin Potassium Salt

[0035] Continue to add 10 grams of deionized water and 100 grams of 34% KOH solution to the three-necked flask, the solution turns yellow, slowly lower the temperature to room temperature, stir quickly to dissolve the oil in the solution, and then add 24 grams of Potassium ferrate was stirred magnetically for 35 minutes at room temperature to obtain the intermediate product vanillin potassium salt;

[0036] 3. Preparation and purification of the target product vani...

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Abstract

The invention discloses a method for preparing natural vanillin by utilizing eugenol. The method comprises the following steps of preparing isoeugenol sylvine, preparing an intermediate product vanillin sylvine, and preparing and purifying the target product vanillin. The reaction is stable, the condition is more moderate compared with the traditional process, the yield is higher, the product quality is better, edible spice is widely used for the strong milky fragrance of the target product, the mass production is easy to realize, and the pollution is little in the production process.

Description

technical field [0001] The invention relates to a method for preparing natural vanillin, in particular to a method for preparing natural vanillin from eugenol. Background technique [0002] Vanillin is a widely used edible spice with a strong milky aroma. It is widely used in the flavoring of food, tobacco, washing, cosmetics and medicines; the deodorization of plastics, rubber and other industrial products; it is also an important pharmaceutical raw material and industrial additives. So it has potential research and application value. It is mainly used in the preparation of food flavors in China, but it is widely used in foreign countries. It is widely used in the production of 3,4,5-trimethoxybenzaldehyde (TMBA), an intermediate of pharmaceutical synergists such as dopa, methyldopa and sulfa drug. Production, used as plant growth promoter, fungicide, lubricant defoamer, electroplating brightener, printed circuit board production conductive agent, etc. The current proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C47/58C07C45/65
CPCC07C41/32C07C45/27C07C47/58C07C43/23
Inventor 乐长高谢宇曾繁山谢宗波张二欢潘建飞刘福明
Owner EAST CHINA UNIV OF TECH
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