1. The sodium acetate trihydrate was placed in a porcelain dish and heated at 120 ° C until a dry white material was obtained to obtain anhydrous sodium acetate. In organic synthesis, for example, when methane is co-melted with anhydrous sodium acetate and soda lime, the anhydrous sodium acetate used should be prepared just prior to use. Put an appropriate amount of sodium acetate trihydrate in a porcelain evaporating dish and heat it to about 58 ° C while 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. The temperature is about 120 ° C. . Continue heating until the solid melts, but the temperature does not exceed the melting point of sodium acetate (324 ° C), so as not to decompose sodium acetate into acetone and sodium carbonate. Cool a little while stirring, heat it in a mortar and store it in a closed container for later use.
2. The acetic acid is neutralized with crystalline sodium carbonate, filtered, evaporated, cooled, crystallized, and dried at room temperature.
3. It is formed by treating calcium acetate with sodium sulfate and sodium hydrogencarbonate.
4, sodium acetate production methods are many, can be obtained by dilute acetic acid or calcium acetate and soda ash; can also be obtained by metathesis of sodium sulphate and calcium acetate. In the industry, sodium acetate is often recovered from the waste of pharmaceutical and perfumery plants. 628 kg of dilute acetic acid was poured into the reactor, and 200 kg of soda ash was added to the reactor in portions. Do not stir, start the induced draft fan to pump. After the reaction was stabilized, the stirring was started, and the soda ash and acetic acid were sufficiently reacted, and then heated in an evaporator to concentrate until the liquid density was 1.24 g/cm3, and the heating was stopped. The reaction solution was filtered and driven into a crystallizer, and the pH was adjusted to 9.2 with NaOH, and cooled to 35 ° C to crystallize. The surface mother liquor was removed and dried to give 350 kg of a white powdery product. The primary yield is about 70%.