Here are several production methods for calcium stearate


Aug 11, 2023

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It is a common saturated long-chain fatty acid. The hydrophilic carboxyl group and the lipophilic carbon chain end are both present in the stearic acid. The surface is hydrophilic of the nano-calcium carbonate, so it is coated with stearic acids 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.
It is a white powder that is insoluble with water, cold alcohol and ether. But it’s soluble with organic solvents, such as hot benzene. It is flammable and slowly decomposes when heated up to 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 calcium chloride with a concentration of 1074kg/m3 (also known as 10degBe), is added to a sodium stearate preparation prepared earlier. Metathesis occurs at approximately 65degC. The calcium stearate product is separated by precipitation. Then, it is filtered and washed in water before being dried at 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 stearic-acid emulsion, prepared within 2 hours, was slowly added to the suspension of calcium oxide. After stirring, the white insoluble matter formed, called calcium stearate (calcium stearate), was 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. Then, the calcium chloride with a 1074kg/m3 content was added to sodium stearate, the metathesis reaction took place at 65, and then the product calcium-stearate was precipitated. The product is dried, washed in water and filtered.
(also called Technology Co. Ltd.) has been supplying ultra-high-quality chemicals and nanomaterials for more than 12 year. Our company produces different stearics acids such as lead stearate aluminum stearate magnesium stearate calcium stearate etc. If you have any questions, please contact us.