Method for preparing large grain anhydrous sodium sulfate
A technology of sodium sulfate and large particles, applied in chemical instruments and methods, alkali metal sulfite/sulfite, alkali metal compounds, etc., can solve problems such as complicated operation, increased cost, and inability to meet industrial requirements, and achieve The effect of small dosage and wide application range
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Embodiment 1
[0012] Prepare 1000mL of 320g / L sodium sulfate solution, add it to a small simulated generator, and start heating at a stirring speed of 5m / s; add dodecyl phosphate and dodecylbenzenesulfonic acid accounting for 0.02% by weight of sodium sulfate The sodium mixture is 0.064g, and the mass ratio of the two is 1:1; the temperature is kept constant at 60°C. During the reaction process, water was continuously added to keep the concentration of the solution constant; after 1.5 hours of reaction, the heating was stopped, the solution was discharged, suction filtered, and dried to obtain the product.
Embodiment 2
[0014] Prepare 1000mL of 320g / L sodium sulfate solution, add it to a small simulated generator, start heating at a stirring speed of 2m / s; add 3.2g of styrene and polyethylene glycol mixture accounting for 1% by weight of sodium sulfate, the two The mass ratio was 10:1; the temperature was kept constant at 150°C. During the reaction process, water is continuously added to keep the concentration of the solution constant; after 2 hours of reaction, the heating is stopped, the solution is discharged, suction filtered, and then dried to obtain the product.
Embodiment 3
[0016] Prepare 1000 mL of 320 g / L sodium sulfate solution, add it to a small simulated generator, and start heating at a stirring speed of 0.5 m / s; add 1.6 g of dodecyl dimethyl amine oxide accounting for 0.5% by weight of sodium sulfate; The temperature was kept constant at 260°C. During the reaction process, water is continuously added to keep the concentration of the solution constant; after 2 hours of reaction, the heating is stopped, the solution is discharged, suction filtered, and then dried to obtain the product.
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