Current Location： Home > News > Chemical Knowledge > Production and manufacturing method and process of glycerin

[Chemical Knowledge]：Production and manufacturing method and process of glycerin

Read： 1241 Time：14months ago Source：Transform the World with Simplicity

Glycerin manufacturing method

Glycerin, also known as glycerol, is a colorless, tasteless, viscous liquid, widely used in chemical, food, medicine and other fields. In the field of raw materials for chemical production, there are two main methods for manufacturing glycerol: biological and chemical methods. This article will detail these two manufacturing methods.

1. biological method

biological method is through microbial fermentation to produce glycerol. In the fermentation process, microorganisms convert sugars such as glucose and sucrose into glycerol. The production of glycerol by biological method has the advantages of mild conditions and renewable raw materials, so it is widely used in industrial production.

1. Strain breeding

Selection of glycerol-producing microbial strains, such as Aspergillus niger, yeast, etc., through mutation breeding or genetic engineering means of strain breeding, improve the glycerol-producing capacity of strains.

2. Fermentation culture

The selected strain is inoculated into a medium containing nutrients such as suitable carbon source, nitrogen source, inorganic salt, etc., for fermentation culture. During the fermentation process, microorganisms convert the carbohydrate material to glycerol.

3. separation and purification of

After fermentation, the bacteria and fermentation broth are separated by centrifugation, filtration and other methods. Then, distillation, extraction and other chemical unit operations are used to purify the glycerol in the fermentation broth to obtain a high purity glycerol product.

2. chemical method

chemical method is through esterification, hydrolysis and other chemical reactions to produce glycerol. Commonly used raw materials include fatty acids, alcohols, esters, etc. Chemical production of glycerol has the advantages of high yield and high product purity, but a large number of chemical reagents such as acid and alkali need to be used in the production process, which has certain pollution to the environment.

1. Esterification

fatty acids and excess alcohols are esterified under the action of an acidic catalyst to produce fatty acid esters and glycerol. Commonly used acidic catalysts include sulfuric acid, hydrochloric acid, and the like.

2. Hydrolysis Reaction

The resulting fatty acid ester is hydrolyzed with excess water in the presence of an alkaline catalyst to produce glycerol and a fatty acid salt. Commonly used basic catalysts include sodium hydroxide, potassium hydroxide, and the like.

3. separation and purification

After the hydrolysis reaction, glycerol and fatty acid salt are separated by liquid separation, washing and other methods. Then the chemical unit operations such as distillation and crystallization are used to purify the glycerol to obtain a high purity glycerol product.

In industrial production, according to different raw material sources and production conditions, different manufacturing methods can be selected to produce glycerol. Biological and chemical methods have their own advantages and disadvantages, and should be selected according to the actual situation. At the same time, it is necessary to pay attention to safety, environmental protection and other issues in the production process to ensure the smooth progress of the production process.

Previous： Manufacturing method and process of palm oil

Next： The production and manufacturing method and process of fatty alcohol.

News Categories