The relationship between calcium stearate and calcium fatty acid is that calcium stearate is a kind of calcium fatty acid. Fatty acid refers to a long aliphatic hydrocarbon chain containing a carboxyl group at one end, which is organic matter. The general formula of straight-chain saturated fatty acids is CnH2n+ 1COOH. The low-level fatty acids are colorless liquids with a sharp odor, while the good fatty acids are waxy solids without obvious odor. Stearic acid, whose chemical formula is C17H35COOH, is a good fatty acid. Similarly, the stearate corresponding to stearic acid is a type of fatty acid salt. The IDENTIFICATION METHOD of calcium stearate: First of all, we have to understand that there are two methods of calcium stearate production: water method and dry method. The details are as follows:
1. Water method is also known as wet method: It means that when water is the medium, add a certain amount of stearic acid, control the appropriate temperature, pressure, and then add a certain amount of saturated caustic soda solution, saponification reaction, sodium stearate dilute solution, and then add calcium chloride into sodium stearate solution, calcium stearate precipitation will be generated. After centrifugation, drying and grinding, the products with a mesh size of 200-600 mesh are obtained in line with industry standards. The stearic acid is usually slightly excessive in water production, so the finished products are acidic after reaction.
2, dry process is also called the melting method, it is to point to in the melting of stearic acid, directly add metal oxide, (of course, in the presence of catalyst, or reaction conversion rate will be very long) control a certain temperature and pressure and stirring speed, calcium stearate is obtained by the reaction of dry products due to the presence of catalyst reaction results can be fully reflect, The metal oxide is slightly excessive, so the product appears alkaline when tested. So we can use phenolphthalein test paper to test, the red is alkaline dry production; The ones that don't change color are produced by the acid water process. In short, the calcium stearate water produced by water method is difficult to meet the industry standards, and the production process produces a lot of waste water and impurities. The calcium stearate produced by Jinyuan Science and Technology is produced by using imported raw materials and dry production technology. Both the appearance and quality are up to the requirements.
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