Calcium stearate preparation technology

Abstract

The invention discloses a calcium stearate preparation technology. The technology comprises the following steps: 1, adding 40-45 parts ofstearic acid, 10-15 parts of calcium hydroxide, 1-5 parts of zinc oxide and 20-30 parts of distilled water into a reaction kettle, and uniformly stirring; 2, heating the reaction kettle to 90DEG C while starting a vacuum system; 3, sampling, analyzing free acids and calcium hydroxide, and ending the reaction if continuous three-time detection results show that the content of calcium hydroxide is zero and the content of the free acids is smaller than 0.5%; and 4, separating the obtained product from raw materials, and drying the product until the water content is smaller than 2% in order to obtain the calcium stearate product. The product prepared in the invention has the advantages of large density, reduced fluidity, unlikely suspension in air, and reduction of the dust pollution.

Description

technical field [0001] The invention relates to a preparation process of calcium stearate. Background technique [0002] Calcium stearate is a non-toxic heat stabilizer and lubricant for polyvinyl chloride products, and an indispensable auxiliary product for the processing of polyvinyl chloride plastic products. At present, the method of domestic production of calcium stearate products is mostly to use stearic acid and aqueous solution of hydrogen oxidizer to saponify to make sodium stearate, then carry out metathesis with calcium chloride aqueous solution and sodium stearate to generate calcium stearate, and finally carry out Washing with water removes chloride ions and uranium ions to obtain calcium stearate. The calcium stearate produced by this method is a very light powder structure with good fluidity. It will be suspended in the air during use, causing pollution to the environment. At the same time, dust will be inhaled when working in this environment. Directly affe...

AI Technical Summary

Problems solved by technology

The calcium stearate produced by this method is a very light powder structure with good fluidity. It will be suspended in the air during use, causing pollution to the environment. At the same time, dust will be inhaled when working in this environment. directly affect the respiratory system

This method produces more aqueous solutions in the production process, and every production of 1 ton of calcium stearate needs to consume 20 tons of water. The chloride and COD in the produced aqueous solution are too high, which cannot be used for recycling and cause a large amount of pollution.

The calcium stearate powder produced by the current calcium stearate process has the problems of excessive fluidity and high environmental protection and operating costs.