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Calcium stearate, which is white, is soluble only in organic solvents, such as hot benzene. It decomposes when heated up to 400degC. If a strong acid is used, it will decompose into stearic acids and the calcium salts.
Four different production methods for Calcium Stearate
1. The synthesis is calcium stearate. The sodium stearate and calcium chloride solutions are mixed together at 65degC. Precipitation separates the calcium stearate. The final product is obtained after it has been filtered, cleaned with water, and dried at 90degC.
2. In 300mL hot water, add 5.60g of calcium oxide (0.1mol). Pour 51.3g of chemically-pure stearic acids in 350mL at 70°C hot water, and add 0.75g ethanolamine. Stir to emulsify. The prepared stearic-acid emulsion is added to the suspension of calcium oxide within 2 hours, fully stirred. The white, insoluble material, which is calcium stearate was then filtered and dried.
3. The catalyst H2O2 is added slowly under constant stirring to the reaction pot. The reaction lasts 1.52.0h. The reaction is complete when the material has been discharged and then cooled.
4. Metathesis method – dissolve stearic acids in hot water 20 times their mass, add caustic soda saturated solution, and perform saponification reactions at around 75degC. You will get dilute sodium stearate. Then, the calcium chloride with a 1074kg/m3 content was added to sodium stearate, the metathesis reaction took place at 65degC, and then the product calcium is precipitated. Then, it is filtered and washed in water before being dried at around 90degC.
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