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It is a common saturated long-carbon-chain fatty acid. The hydrophilic carboxyl group and the lipophilic carbon chain end are both present in the stearic acid. The surface of the nano calcium carbonate has a hydrophilic nature, and stearic acids are coated onto it to increase its lipophilicity. The large specific surface area of the calcium carbonate and its high specific surface energies make it a good filler for rubber, plastics or advanced inks. The bond between the two can enhance the performance of the product and make it brighter.
The powdered calcium stearate comes in a white color. It is insoluble with water, cold alcohol and ether. But it is soluble with organic solvents, such as hot benzene. It is combustible, and it decomposes very slowly at 400degC. If a strong acid is used, it will decompose into stearic acids and the calcium salts.

Calcium stearate can be produced in four different ways

1. The synthesis is calcium stearate. The sodium stearate and calcium chloride solutions are mixed together at 65degC. Precipitation separates calcium stearate. The finished product is obtained after it has been filtered, washed in water and dried around 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 of Diethanolamine. 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. After the reaction has been completed, the material will be discharged, cooled, and crushed in order to obtain the finished product.

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. The sodium stearate is then mixed with the calcium chloride solution containing 1074kg/m3. Metathesis reaction takes place at 65degC and the product, calcium stearate, precipitates out. The product is dried, filtered and washed in water.
(also called Technology Co. Ltd.) has been a leading global supplier of chemicals and nanomaterials for over 12 years. Our company produces different stearics acids such as lead stearates, calcium stearates, magnesium stearates, and aluminum stearates. If you have any questions, please contact us.

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