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A kind of production method of vanillin

A production method and technology for vanillin, which are applied in the field of substance synthesis in the chemical industry, can solve problems such as pollution yield, and achieve the effects of continuous reaction process, high yield and few impurities

Inactive Publication Date: 2011-12-14
LIAONING SHIXING PHARMA & CHEM
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  • Summary
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AI Technical Summary

Problems solved by technology

The method solves the technical problems of pollution and high yield through raw material condensation, acidification, wood phenol extraction, oxidation, deacidification, extraction, distillation, crystallization and catalyst regeneration and utilization processes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] To produce vanillin with wood phenol as raw material, the production process is as follows:

[0035] 1. Raw material condensation

[0036] Put water and glyoxylic acid into the neutralization tank in sequence, turn on freezing and stirring, start to drop caustic soda solution after cooling down, control the dropping speed, keep the internal temperature, test the pH frequently, when the pH is neutral, the reaction is over.

[0037] Put water, wood phenol and caustic soda solution into the condensation kettle in turn, start stirring, control the temperature in the kettle by adjusting the freezing or steam, and after stirring, open the bottom valve of the neutralization kettle, put the sodium glyoxylate solution into the condensation kettle, Control the temperature and continue to stir to raise the temperature, stop stirring and stand still until the condensation reaction ends

[0038] 2. Acidification of condensation liquid

[0039] Put metered water into the sulfuric a...

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PUM

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Abstract

The invention proposes a production method of vanillin. Production of vanillin from wood phenol, after condensation of raw materials, acidification of condensation liquid, extraction of wood phenol, oxidation of condensation liquid, decarboxylation of oxidation liquid, extraction of vanillin, distillation of vanillin, crystallization of vanillin, catalyst regeneration and vanillin The product drying and packaging process is completed. The invention uses wood phenol as raw material to produce vanillin, which has the advantages of continuous reaction process, recycling of auxiliary materials, no discharge of harmful substances, no pollution to the environment, high yield of vanillin product and less impurities . It is suitable for application in the production of vanillin fragrance.

Description

technical field [0001] The present invention proposes a method for synthesizing substances in the chemical industry, specifically a method for producing vanillin. Background technique [0002] Vanillin: [0003] Chinese synonyms: 4-Hydroxy-3-methoxybenzaldehyde; Vanillin; Vanillin; Vanillin; 3-Methoxy-4-Hydroxybenzaldehyde; Vanillin; Vanillin; Vanillin white. [0004] Vanillin is the first fragrance synthesized by humans. Usually divided into methyl vanillin and ethyl vanillin. [0005] Methyl vanillin (vanillin), chemical name 3-methoxy-4-hydroxybenzaldehyde, white or yellowish crystal in appearance, with vanilla aroma and strong milky aroma, is the largest variety in the fragrance industry and is The main ingredient in the universally loved creamy vanilla flavor. It has a wide range of uses, such as flavoring raw materials, flavoring agents or fixatives in the food, daily chemical, and tobacco industries. Among them, beverages, candies, pastries, biscuits, bread, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C47/58C07C45/81
CPCY02P20/584
Inventor 董大为王文勇赵志刚高华唯马洪茹李春雨
Owner LIAONING SHIXING PHARMA & CHEM
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