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It is a 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 is hydrophilic. Therefore, stearic is applied to it. This can improve its lipophilicity. The large surface area of the calcium carbonate and its high specific energy can be beneficial when it is used in rubber, plastics or advanced inks. The bond between the two can enhance the performance of the product and make it brighter.
Calcium stearate, which is white, is insoluble with water, cold alcohol and ether. It’s soluble, however, 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 salt that corresponds.

Four different production methods for Calcium Stearate

1. Synthesis of Calcium Stearate. The calcium chloride with a concentration of 1074kg/m3 (also known as 10degBe), is added to the sodium-stearate solution, and the metathesis reactions are carried out at approximately 65degC. The calcium stearate product is separated by precipitation. The final product is obtained after it has been filtered, cleaned with 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 emulsion, after stirring, was slowly added to the calcium stearate suspension in 2 hours.

3. The catalyst H2O2 is added slowly under constant stirring to the reaction pot. The reaction lasts 1.52.0h. After the reaction, the material must 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. Then, the calcium chloride with a 1074kg/m3 content was added to sodium stearate, and metathesis reaction at 65 was carried out. Finally, calcium stearate is precipitated. Then, it is filtered and washed in water before being dried at 90degC.
(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.