Stearic Acid is a well-known long-carbon chain saturated fat acid. It has both the lipophilic side of long carbon chains and the hydrophilic side of carboxyl groups. Hydrophilic surfaces of nano-calcium carbonate are coated with stearic acid to enhance their lipophilicity. This material is useful for bonding calcium carbonate and other organic polymer molecules when it’s filled with plastics, rubber, advanced inks, coatings and plastics. This strong bond can give the product a bright surface and excellent reinforcement performance.
Calcium stearate (white powder) is insoluble in water, coldethanol, and ether. However, it can dissolve slightly in organic solvents, such as hotbenzene. The product is easily combustible when it’s heated up to 400°C. In the case of strong acids, it decomposes to stearic acid or the equivalent calcium salt. These are hygroscopic.
Four methods of producing calcium stearate
1. This is the process of preparing calcium stearate. Calcium chloride solution containing 1074kg/m3 (10°Bé), is then added to the sodium salt solution. To obtain the final product, it must be filtered.
2. Take 5.60g of calcium oxide (0.1mol) in 300mL. 55 heat water. Mix 51.3g chemically pure Stearic Acid in 350mL boiling water. At 70 degrees, stir and then add 0.75g Diethanolamine. Stir to combine. In 2 hours, slowly add the prepared stearic acids emulsion to the calcium dioxide suspension. After stirring, remove any insoluble matter, such as calcium stearate.
3. To make the catalyst H2O2, add some stearic acid to a pot with a stirrer. Once it has melted, add the catalyst slowly to keep the temperature at 140 to 150. Reaction time: 1.5-2.0 hours. Once the reaction has completed, the material can be discharged and cooled to make the final product.
4. The metathesis method involves dissolved stearic in 20 times of the hot water mass, adding saturated caustic soy solution to dissolve it, then undergoing a saponification reaction at approximately 75°C to produce dilute sodium stearate. Next, add the 1074kg/m3 calcium chloride solution to the sodium-stearate mixture. After that, perform the metathesis reaction at approximately 65. Calcium stearate is precipitated. To obtain the final product, it must be filtered.
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