Preparation process of calcium stearate

Abstract

The invention discloses a preparation process of calcium stearate. The method comprises the following steps: S1: firstly adding 42 parts of water to a reaction kettle, heating the material to 45 DEG Cwith steam, adding 1 part of calcium hydroxide, stirring the material uniformly, and then adding 7 parts of stearic acid, and uniformly stirring the material; S2: after stirring evenly, continuouslyheating the material with the steam to the temperature of 75-80 DEG C; S3: after sampling analysis, obviously layering the material and water, and completing the reaction; and S4: separating the product from the raw material, and drying the product to obtain the calcium stearate product. The reaction temperature of the preparation process is low, the temperature is controlled at 75 to 80 DEG C, the steam consumption is small, and the reaction time is short, the normal reaction kettle material is about 800 kg, and the reaction time is about 20 minutes from feeding to ending of the reaction, which greatly shortens the reaction time. The calcium content, free acid and melting point of the calcium stearate obtained by the reaction of the invention can reach the standards of superior products,the reaction yield is high, and the by-product has no other products except water.

Description

technical field [0001] The invention relates to the technical field of calcium stearate processing equipment, in particular to a preparation process of calcium stearate. Background technique [0002] At present, the domestic production methods of calcium stearate mainly include double decomposition method, saponification method, one-step synthesis method and some special synthesis methods. The metathesis method is to take stearic acid as the main raw material, at an appropriate temperature, carry out heating and melting and saponification reaction with sodium hydroxide solution, and the generated sodium stearate and soluble calcium salt carry out metathesis reaction to generate calcium stearate. The metathesis method has mild reaction conditions, but there are disadvantages such as poor product quality, high production cost, low production efficiency, high energy consumption and high water consumption, and a large amount of salty wastewater is discharged during the productio...

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Problems solved by technology

The reaction conditions of the metathesis method are mild, but there are disadvantages such as poor product quality, high production cost, low production efficiency, high energy consumption and high water consumption, and a large amount of salty wastewater is discharged during the production of calcium stearate by the metathesis method, which has caused great harm to the environment. big pollution

The one-step synthesis of calcium stearate is to directly react calcium oxide or calcium hydroxide with stearic acid under certain conditions to generate calcium stearate. The current domestic one-step synthesis of calcium stearate needs to add a catalyst (hydrogen peroxide or ethanol) , because of ethanol in the drying process, there are potential safety hazards, the reaction time is long (1-3 hours), the product yield is low, and the assembly is high

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