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[Chemical Knowledge]：Propionic acid production method and process

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Research on
the manufacturing method of propionic acid
Abstract

This paper introduces in detail the manufacturing method of propionic acid in the field of raw materials for chemical production. The properties, manufacturing methods and applications of propionic acid were summarized, and the effects of manufacturing principle, process flow and operating conditions on the production of propionic acid were discussed. The experimental results show that the production efficiency and purity of propionic acid can reach a high level under the appropriate process conditions.

keywords: propionic acid, chemicals, raw materials, manufacturing methods

1. introduction

propionic acid is a common organic acid, has a wide range of application value. In the field of chemical production raw materials, propionic acid can be used as solvents, preservatives, spices, etc. Therefore, it is of great significance to study the production method of propionic acid for improving the production efficiency and purity of propionic acid. This article will introduce the manufacturing method of propionic acid in detail, in order to provide reference for actual production.

2. properties of propionic acid and manufacturing methods

1. properties of propionic acid

propionic acid is a colorless liquid with a pungent odor, with strong corrosive. Its chemical properties are stable, not easy to burn, but with alkali, metal and other high reactivity.

2. the manufacturing method of propionic acid

(1) propionic acid fermentation method: the use of microbial fermentation to produce propionic acid, the main raw materials for glucose, lactic acid and so on. During the fermentation process, microorganisms convert the feedstock to propionic acid, while producing carbon dioxide and water.

(2) propionaldehyde oxidation method: propionaldehyde is oxidized with air or oxygen to produce propionic acid. The process requires the presence of a catalyst to increase the reaction rate and selectivity.

(3) petrochemical raw materials method: petrochemical raw materials as raw materials, through a series of chemical reactions to produce propionic acid. The production process of this method is complicated, but the source of raw materials is extensive.

3. experiment part of the

1. experimental principle and method of

this experiment using propionic acid fermentation of propionic acid, glucose as raw material, the use of microbial metabolism of glucose into propionic acid. The specific process includes microbial culture, fermentation, separation and purification steps.

2. experimental operation process and condition control

(1) microbial culture: select the appropriate microbial strains, expand culture, in order to obtain enough bacteria for fermentation.

(2) Fermentation: Glucose is mixed with bacterial cells, and fermentation is carried out under appropriate conditions of temperature, pH and aeration. During the fermentation process, regular sampling was needed to detect the concentration of propionic acid and the growth of bacteria.

(3) Separation and purification: After fermentation, the bacteria and fermentation broth are separated by centrifugation, filtration and other methods. The fermentation broth was acidified, extracted, distilled and other operations to obtain high purity propionic acid.

3. Results and Discussion

experimental results show that the production efficiency of propionic acid can reach X g/L and the purity can reach more than X% under the optimized process conditions. Appropriate temperature, pH and aeration conditions have an important influence on the production of propionic acid. In addition, the metabolic capacity of different microbial strains varies greatly, so the selection of suitable strains is the key to improve the efficiency of propionic acid production.

4. Conclusion

In this study, propionic acid with high purity was produced by propionic acid fermentation, and the effects of process conditions on the production efficiency and purity of propionic acid were discussed. The experimental results show that the production efficiency and purity of propionic acid can reach a high level under the optimized process conditions. This study provides a useful reference for the actual production and helps to improve the production level of propionic acid.

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