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Method for preparing barium stearate by using stearic acid

A technology of barium stearate and stearic acid, which is applied in the field of organic compound synthesis, can solve the problems of large heat loss, difficult treatment, and high water consumption, and achieve the effects of no three wastes, low energy consumption, and simple process flow

Inactive Publication Date: 2014-06-25
QINGDAO SHUAIWANG OIL CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the main method of producing barium stearate products in China is saponification metathesis method. It is understood that more than 80% of stearate manufacturers do not perform washing operation, which will cause barium stearate to contain soluble salts and saponification of barium stearate. The double decomposition process has a lot of water consumption, and the high concentration of inorganic salts in the wastewater is difficult to deal with. The temperature of the discharged wastewater is about 40-80°C, and the heat loss is very large.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1, a kind of stearic acid synthesis prepares the method for barium stearate, comprises the following steps:

[0016] (1) Take 30 parts of stearic acid in parts by weight, 10 parts of barium hydroxide aqueous solution, 3 parts of catalyst, and 2 parts of water;

[0017] (2) Under normal pressure, take 30 parts of stearic acid and 10 parts of barium hydroxide aqueous solution, under the action of 3 parts of catalyst, react in 2 parts of water for 20 minutes, and control the temperature at 110 °C;

[0018] (3) After the reaction, take a sample to detect the acid value, then lower the temperature to 60°C, and react for another 10 minutes. The obtained product is dehydrated to obtain damp barium stearate, and dried to obtain barium stearate.

[0019] The concentration of the above-mentioned barium hydroxide aqueous solution is 0.5-3%.

[0020] The pH of the above water is 9-10.

Embodiment 2

[0021] Embodiment 2, a kind of stearic acid synthesis prepares the method for barium stearate, comprises the following steps:

[0022] (1) Take 40 parts of stearic acid in parts by weight, 13 parts of barium hydroxide aqueous solution, 5 parts of catalyst, and 4 parts of water;

[0023] (2) Under normal pressure, take 40 parts of stearic acid and 13 parts of barium hydroxide aqueous solution, under the action of 5 parts of catalyst, react in 4 parts of water for 60 minutes, and control the temperature at 140 °C;

[0024] (3) After the reaction, take a sample to detect the acid value, then lower the temperature to 70°C, and react for another 15 minutes. The obtained product is dehydrated to obtain damp barium stearate, and dried to obtain barium stearate.

[0025] The concentration of the above-mentioned barium hydroxide aqueous solution is 0.5-3%.

[0026] The pH of the above water is 9-10.

Embodiment 3

[0027] Embodiment 3, a kind of stearic acid synthesis prepares the method for barium stearate, comprises the following steps:

[0028] (1) Take 50 parts of stearic acid in parts by weight, 15 parts of barium hydroxide aqueous solution, 8 parts of catalyst, and 5 parts of water;

[0029] (2) Under normal pressure, take 50 parts of stearic acid and 15 parts of barium hydroxide aqueous solution, under the action of 8 parts of catalyst, react in 5 parts of water for 80 minutes, and control the temperature at 160 °C;

[0030] (3) After the reaction, take a sample to detect the acid value, then lower the temperature to 80°C, and react for another 25 minutes. The obtained product is dehydrated to obtain damp barium stearate, and dried to obtain barium stearate.

[0031] The concentration of the above-mentioned barium hydroxide aqueous solution is 0.5-3%.

[0032] The pH of the above water is 9-10.

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Abstract

The invention discloses a method for preparing barium stearate by using stearic acid. The method comprises the following steps: 1, taking 30-50 parts by weight of stearic acid, 10-15 parts by weight of an aqueous solution of barium hydroxide, 3-8 parts by weight of a catalyst and 2-5 parts by weight of water; 2, reacting 30-50 parts of stearic acid with 10-15 parts of the aqueous solution of barium hydroxide in 2-5 parts of water under the action of 3-8 parts of the catalyst at a temperature of 110-160DEG C under normal pressure for 20-80min; and 3, sampling after the reaction, detecting the acidity, cooling to 60-80DEG C, reacting for 10-25min, dehydrating the above obtained product to obtain wet barium stearate, and drying to obtain barium stearate. The invention relates to the technical field of organic compound synthesis, and provides the method for preparing barium stearate by using stearic acid.

Description

technical field [0001] The invention relates to the technical field of organic compound synthesis, in particular to a method for preparing barium stearate by synthesizing stearic acid. Background technique [0002] Barium stearate is mainly used as a light-resistant and heat-resistant stabilizer for PVC. It is the best medium and long-term stable alkaline earth metal stearate. It has a synergistic effect when used together with zinc and cadmium soaps. Mainly used for transparent film, sheet and artificial leather, hard pipe fittings, etc. This product has poor pressure-analysis performance, and segregation and scaling will occur when the dosage is too large. Used as a high-temperature additive in the rubber industry, it can increase the softness of natural rubber and synthetic rubber. It is also used as a mechanical high temperature resistant lubricant and a high temperature resistant mold release agent. [0003] At present, the main method of producing barium stearate pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C53/126C07C51/41
CPCC07C51/412
Inventor 王明夫
Owner QINGDAO SHUAIWANG OIL CHEM
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