Introduction of the production method of sodium acetate
2022-07-27
Sodium acetate is a chemical substance that is used in our lives as a sour agent for food such as sauces, sauerkraut, mayonnaise, fish cakes, sausages, bread, sticky cakes, etc., as well as meat preservatives, pigments, etc. It, there are many production methods of sodium acetate, our company will help you to list a few, so that sodium acetate can benefit people better:
1. Place sodium acetate trihydrate in a ceramic dish, heat at 120°C until a dry white substance is obtained, and obtain anhydrous sodium acetate.
In organic synthesis, for example, when using anhydrous sodium acetate and soda lime eutectic to prepare methane, the anhydrous sodium acetate used should be prepared immediately before use. Put an appropriate amount of sodium acetate trihydrate in a porcelain evaporating dish, and heat it to about 58°C under stirring with a glass rod, the sodium acetate trihydrate is dissolved in the crystal water, and the water gradually evaporates to obtain a white solid, and the temperature at this time is about 120°C . Continue to heat until the solid melts, but the temperature should not exceed the melting point of sodium acetate (324°C) to avoid the decomposition of sodium acetate into acetone and sodium carbonate. Cool slightly with stirring, grind finely in a mortar while still hot, and store immediately in an airtight container until later.
2. Neutralize acetic acid with crystalline sodium carbonate, filter, evaporate, cool, crystallize, and dry at room temperature.
3. It is formed by treating calcium acetate with sodium sulfate and sodium bicarbonate.
4. There are many production methods of sodium acetate, which can be obtained by the action of dilute acetic acid or calcium acetate and soda ash; it can also be obtained by metathesis of sodium sulfate and calcium acetate. In industry, the scraps of pharmaceutical factories and spice factories are often used to recover sodium acetate. Pour 628kg of dilute acetic acid into the reactor, and add 200kg of soda ash into the reactor in stages. Without stirring, start the induced draft fan to extract air. After the reaction is stable, start stirring to make the soda ash and acetic acid fully react, and then put it into the evaporator to heat and concentrate until the liquid density is 1.24g/cm3 and stop heating. The reaction solution was filtered and poured into a crystallizer, adjusted with NaOH to pH 9.2, and cooled to 35°C for crystallization. The surface mother liquor was removed, and the crystallization was dried to obtain 350kg of white powdery product. The primary yield is about 70%.
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