1. The synthesis of calcium stearate involves adding a calcium chloride solution with a content of 1074kg/m3 (10 ° B é) to the sodium stearate solution prepared above. The complex decomposition reaction is carried out at around 65 ° C, and the product calcium stearate precipitates. Then, after filtration, washing with water, and drying at around 90 ℃, the finished product is obtained.
2. Suspend 5.60g (0.1mol) of calcium oxide in 300mL of hot water at 55 ℃. Then dissolve 51.3g of chemically pure stearic acid in 350mL of hot water at 70 ℃, add 0.75g of diethanolamine, and stir to emulsify it. The prepared stearic acid lotion is gradually added to the calcium oxide suspension within 2h, and fully stirred. The white insoluble matter, namely calcium stearate, is filtered out and dried to obtain the product.
3. Direct method: Add a certain amount of stearic acid and CaO to a reaction pot equipped with a stirrer and a thermometer, heat up to melt, slowly add the catalyst H2O2 under continuous stirring, and vacuum control the reaction temperature at 140-150 ℃ for 1.5-2.0 hours. After the reaction is complete, discharge and cool, crush to obtain the product.
4. Double decomposition method: Dissolve stearic acid in 20 times the mass of hot water, add saturated caustic soda solution, and perform saponification reaction at around 75 ℃ to generate dilute sodium stearate solution. Then add a calcium chloride solution with a content of 1074kg/m3 to a sodium stearate solution, and perform a double decomposition reaction at around 65 ℃, resulting in the precipitation of calcium stearate as a product. Then, after filtration, washing with water, and drying at around 90 ℃, the finished product is obtained.