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Preparation process of dibasic lead stearate

A dibasic lead stearate and preparation technology, which is applied in the direction of carboxylate preparation, carboxylate preparation, organic compound preparation, etc., can solve the problem of low output, achieve high product yield, and improve production efficiency , low cost effect

Inactive Publication Date: 2014-08-13
JIANGSU LIANMENG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When making dibasic lead stearate by traditional technology, it is necessary to saponify stearic acid and then metathesis react with soluble lead salts to generate lead stearate, which is then lightened into dibasic lead stearate, which requires 8-10 times the hardness of lead stearate during saponification. Fatty acid water will produce a large amount of waste water containing lead and COD, and the output is very low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Put Huangdan and stearic acid into the reactor at a molar ratio of 3:2, raise the temperature to 120°C, and react for 1 hour; then add water and sodium hydroxide into the reactor, water is 2% of the content of stearic acid, Sodium hydroxide is 2% of the content of stearic acid, mixed and stirred evenly, kept at 120°C, reacted for 1 hour, then cooled to 100°C, reacted for 3 hours to obtain dibasic lead stearate; then obtained dibasic lead stearate Lead stearate is dewatered by a hydraulic jet vacuum pump for 1 hour, and the vacuum pump is turned off; finally, the dibasic lead stearate after dewatering is formed into sheets on a two-roller machine, and packed into warehouses.

Embodiment 2

[0019] Put Huangdan and stearic acid into the reactor at a molar ratio of 3:2, raise the temperature to 110°C, and react for 0.5 hours; 0.2%, the total amount of potassium hydroxide and triethanolamine is 1.5% of the stearic acid content, mix and stir evenly, keep at 110°C, react for 0.5 hours, then cool down to 105°C, and react for 2 hours to obtain dibasic stearic acid lead; then the obtained dibasic lead stearate is dewatered by a hydraulic jet vacuum pump for 0.5 hour, and the vacuum pump is turned off; finally, the dibasic lead stearate after dewatering is formed into flakes on a two-roller machine, and packaged for storage.

Embodiment 3

[0021] Put Huangdan and stearic acid into the reactor at a molar ratio of 3:2, raise the temperature to 100°C, and react for 0.8 hours; then add water, sodium carbonate and potassium carbonate into the reactor, and the water is 1.5% of the stearic acid content. %, the total amount of sodium carbonate and potassium carbonate is 1.8% of the content of stearic acid, mixed and stirred evenly, kept at 100 ° C, and reacted for 2.5 hours to obtain dibasic lead stearate; then the obtained dibasic lead stearate Use a hydraulic jet vacuum pump to remove water for 0.4 hours, and then turn off the vacuum pump; finally, the dibasic lead stearate after water removal is formed into sheets on a two-roller machine, and packed for storage.

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Abstract

The invention relates to a preparation process of dibasic lead stearate. The preparation process comprises the following steps: I. adding yellow lead and stearic acid to a reaction kettle in a molar ratio of 3: 2, heating up and reacting completely; II. adding water and an accelerant to the reaction kettle, wherein the water accounts for 0.2-2% of content of the stearic acid and the accelerant accounts for 0.2-2% of the content of the stearic acid; mixing and uniformly stirring, and reacting completely to form salt, i.e., a dibasic lead stearate product; III. dewatering the dibasic lead stearate product prepared through a vacuum pump; IV. tabletting and packaging the dewatered dibasic lead stearate product to obtain a finished product. According to the dibasic lead stearate preparation process, the yellow lead and the stearic acid react directly, and little water and accelerant are added, so that cost is relatively low, processing technology is simple, product yield is high and wastewater amount is greatly reduced; meanwhile, production efficiency is greatly improved.

Description

technical field [0001] The invention relates to the field of heat stabilizer preparation, in particular to a preparation process of dibasic lead stearate. Background technique [0002] Heat stabilizers are a class of additives that can prevent or reduce the degradation or crosslinking of polymers due to heat during processing and use, and prolong the service life of composite materials. Commonly used stabilizers can be classified into bases, fatty acid soaps, organotin compounds, compound heat stabilizers and pure organic compounds according to their main components. [0003] When making dibasic lead stearate by traditional technology, it is necessary to saponify stearic acid and then metathesis react with soluble lead salts to generate lead stearate, which is then lightened into dibasic lead stearate, which requires 8-10 times the hardness of lead stearate during saponification. Fatty acid water will produce a large amount of waste water containing lead and COD, and the ou...

Claims

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Application Information

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IPC IPC(8): C07C53/126C07C51/41
CPCC07C51/412C07C53/126
Inventor 严德道周腊芳
Owner JIANGSU LIANMENG CHEM
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