Method for producing sodium acetate trihydrate and anhydrous sodium acetate as byproducts
A technology for producing sodium acetate trihydrate and sodium acetate trihydrate, which is applied to the production of sodium acetate trihydrate and sodium acetate anhydrous, and the field of sodium acetate trihydrate and sodium acetate by-product, which can solve the problem of difficult particles, high energy consumption, and acetic acid Solve problems such as sodium supercooling, achieve low production costs, solve environmental problems, and avoid a large amount of energy consumption
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[0021] Step 1. Pour 3000kg sodium acetate solution with Baume degree 18°Bé obtained from the by-product in the trimellitic anhydride production process into the batching kettle, turn on the stirring, neutralize it with glacial acetic acid to pH 8, and then neutralize this Pump the sodium acetate solution into the evaporation kettle;
[0022] Step 2. Evaporate under -0.07MPa vacuum and 92~96℃ temperature to make it concentrated. When solid particles in the kettle liquid are observed from the sight glass, stop heating and judge the kettle solution according to the liquid level The total mass is about 1200kg;
[0023] Step 3. After evacuating the vacuum of the evaporation kettle, transfer the concentrated sodium acetate solution into the crystallization kettle, turn on the stirring, and cool it with circulating cooling water. When the temperature of the sodium acetate solution drops to 58°C, add 1 kg of trihydrate acetic acid Sodium crystals, and then let the sodium acetate solution ...
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