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[Chemical Knowledge]：Manufacturing method and process flow of lauric acid

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Lauric acid is a common saturated fatty acid, which is widely found in animals and plants, especially in oils. In the field of chemical production raw materials, lauric acid has important application value, which can be used as surfactants, food additives, spices and so on. This article will introduce the manufacturing method of lauric acid.

1. the physical properties of lauric acid

lauric acid is a white crystalline solid with a melting point of 44-46 ℃ and a boiling point of 249 ℃. It is insoluble in water and soluble in organic solvents such as ethanol and ether. Lauric acid is highly acidic and can react with alkali to form lauric acid salt.

2. Lauric acid Manufacturing method

1. Extraction of

from natural oils and fats Lauric acid is widely present in animals and plants, especially in oils and fats, so lauric acid can be extracted from natural oils and fats. Common extraction methods are fractionation and solvent method. The fractionation method is to separate lauric acid after the fat is heated and melted, and then fractionated. Solvent method is to use organic solvent to dissolve the oil, and then separate the lauric acid from the solution. Both of these methods can obtain higher purity lauric acid.

2. Chemical Synthesis

lauric acid can also be prepared by chemical synthesis. A common synthetic route is to esterify dodecanol and carboxylic acid to obtain lauric acid ester by esterification reaction, and then hydrolyze lauric acid ester to obtain lauric acid and alcohol by saponification reaction. The specific steps are as follows:

(1) Mix dodecanol and carboxylic acid in a molar ratio of 1:1, add catalyst sulfuric acid, and heat to reflux for 6-8 hours.

(2) After completion of the reaction, the mixture is cooled to room temperature, the acid is neutralized with an alkali solution, and then the laurate is extracted with an organic solvent.

(3) The lauric acid ester is mixed with an aqueous sodium hydroxide solution and heated to reflux to produce sodium laurate and an alcohol.

(4) After completion of the reaction, the reaction mixture was cooled to room temperature and acidified with hydrochloric acid to obtain a precipitate of lauric acid.

(5) The lauric acid precipitate is washed with an organic solvent and dried to obtain lauric acid having a high purity.

3.

Lauric acid as an important chemical raw material, widely used in food additives, surfactants, spices and other fields. In the field of food additives, lauric acid can be used as preservatives, antioxidants, etc., to extend the shelf life of food. In the field of surfactants, lauric acid can be used as an emulsifier, wetting agent, etc., to improve the performance of the product. In the field of spices, lauric acid can be used as a raw material for the preparation of flavors and flavors for the production of various flavor products.
Precautions for
4.

In the process of manufacturing lauric acid, they need to pay attention to safety issues to avoid fires, explosions and other accidents. At the same time, it is necessary to strictly control the quality of the product to ensure that the purity and stability of the product meet relevant standards.

In short, there are many methods for manufacturing lauric acid, and a suitable method can be selected for production according to the actual situation. In the production process, it is necessary to pay attention to safety and quality issues to ensure the performance and use value of the product.

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