Anhydrous sodium acetate

1. Application
Anhydrous sodium acetate is widely used. In the chemical industry, it is often used as an esterification agent for organic synthesis. In the preparation of acetate esters, anhydrous sodium acetate participates in the reaction as an important raw material, which promotes the smooth progress of the esterification reaction and improves the yield and quality of the product. In the printing and dyeing industry, it is a commonly used dye promoter. When the fabric is dyed, anhydrous sodium acetate can adjust the pH of the dyeing bath, so that the dye can be better adsorbed on the fabric fibers, thereby improving the dyeing effect and making the color more uniform and firm. In the food industry, anhydrous sodium acetate can be used as a preservative. Because it has a certain bacteriostatic ability, it can inhibit the growth and reproduction of microorganisms in food In addition, in the pharmaceutical industry, anhydrous sodium acetate can also be used as a buffer to adjust the pH value of pharmaceutical preparations to ensure drug stability and effectiveness.

Second, properties
Anhydrous sodium acetate, chemical formula is $CH_3COONa $, in the form of white crystalline powder, odorless or slightly vinegar taste. Its density is 1.528g/cm ³, melting point up to 324 ℃. Easily soluble in water, its aqueous solution is alkaline. It can slowly absorb water in the air and has a certain deliquescence. Anhydrous sodium acetate has good thermal stability and is not easy to decompose within a certain temperature range, which makes it stable in some chemical processes that require high temperature reactions and play a role. At the same time, due to its molecular structure containing acetate ions and sodium ions, it not only has some chemical properties of acetate ions, such as the ability to react with acids to form acetic acid, but also has the characteristics of sodium ions, which can play a specific role in some ionic reactions.

Third, there are various production methods for producing
anhydrous sodium acetate. A common one is prepared by reacting acetic acid with sodium hydroxide. First, acetic acid is added to the reactor, and the sodium hydroxide solution is slowly added under stirring, and a neutralization reaction occurs: $CH_3COOH + NaOH\ longrightarrow CH_3COONa + H_2O $. After the reaction is completed, the sodium acetate crystals are precipitated by evaporating the water in the solution by heating. Next, the crystals are filtered and washed to remove impurities. After that, it is dried at high temperature to remove the crystal water to obtain an anhydrous sodium acetate product. Another method is to use acetic acid to react with sodium carbonate, and the reaction equation is: $2CH_3COOH + Na_2CO_3\ longrightarrow 2CH_3COONa + H_2O + CO_2 ↑ $. Similarly, anhydrous sodium acetate is obtained after evaporation, crystallization, filtration, drying and other steps. During the production process, the reaction conditions, such as temperature, pH, reaction time, etc., need to be strictly controlled to ensure product quality and yield.