A kind of environment-friendly metal carboxylate and preparation method thereof

A metal carboxylate, environmentally friendly technology, applied in the preparation of carboxylate, organic chemistry and other directions, can solve the problems of high production cost, low reaction temperature, lack of feasibility, etc., to achieve improved product quality, simple preparation process, processing The effect of easy-to-find equipment

Inactive Publication Date: 2011-12-14
BELIKE CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] A large amount of saline wastewater is produced in the production process of the double decomposition method, which pollutes the environment more, and the product contains more impurities, so it is gradually being eliminated
[0008] Although the double decomposition one-step method perfects and improves the traditional process, the consumption of electric energy and water resources required for drying the product in the production process is very large, which is a waste of resources itself. The production process is cumbersome and complicated, and the production cost is high.
The semi-melt method and the direct method can react with calcium and magnesium metal oxides or hydroxides with high activity, but due to the low reaction temperature, it is difficult to completely react, especially at low temperature, zinc oxide is basically not compatible with Fatty carboxylic acid reacts, these two processes lack feasibility in actual operation

Method used

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  • A kind of environment-friendly metal carboxylate and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The preparation of embodiment 1 zinc stearate

[0039] 900kg of stearic acid (acid value 210) was heated and melted at 90°C, then heated to 135°C, added 135kg of zinc oxide (≥99.7%), mixed and dispersed uniformly, within half an hour, added 25kg of 30% The hydrogen peroxide catalyzed the reaction, and the temperature was kept for 1.5 hours. Then, it is cooled into solid flakes, and crushed by a high-speed collision pulverizer to obtain a zinc stearate product. Its quality indicators are: zinc content 10.8%; heating loss ≤0.8%; melting point ≥119°C; free acid ≤0.8%; fineness ≤75μm.

Embodiment 2

[0040] The preparation of embodiment 2 zinc stearate

[0041] 900kg of stearic acid (acid value 210) was heated and melted at 95°C, then heated to 135°C, added 146kg of zinc hydroxide (≥99.7%), mixed and dispersed uniformly, within half an hour, added 20kg 30 % hydrogen peroxide to catalyze the reaction, and keep the temperature for 1.5 hours. Then, it is cooled into solid flakes, and crushed by a high-speed collision pulverizer to obtain a zinc stearate product. Its quality indicators are: zinc content 10.6%; heating loss ≤0.8%; melting point ≥119°C; free acid ≤0.8%; fineness ≤75μm.

Embodiment 3

[0042] The preparation of embodiment 3 magnesium stearate

[0043]900kg of stearic acid (acid value 210) was heated and melted at 100°C, then heated to 138°C, and 101.8kg of magnesium hydroxide (≥96.0%) was added. After mixing and dispersing uniformly, 20kg was added in three times within half an hour. 30% hydrogen peroxide catalyzed the reaction and kept the temperature for 1.5 hours. Then it is cooled into a solid, and the product of magnesium stearate is obtained by pulverizing with a high-speed collision pulverizer. Its quality indicators are: magnesium content 4.8%; heating loss ≤1.5%; melting point ≥120°C; free acid ≤2.0%; fineness ≤75μm.

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Abstract

The invention discloses an environment-friendly metal carboxylate and a preparation method thereof. The metal carboxylate has the following structure: CH3(CH2)nCOO-M-OOC(CH2)nCH3, wherein M is Zn2+, Mg2+, n=10 ~16; Salt formation reaction is carried out by linear saturated monocarboxylic acid and zinc, magnesium oxide or hydroxide powder under the action of a catalyst. The metal carboxylate is a meltable solid, which can be prepared after crushing. A powdery, environmentally friendly metal carboxylate product. The invention has the advantages of simple preparation process, strong operability, energy saving, high product purity, environmental protection and compliance with the requirements of ROHS directive, EU REACH regulation and EN71-3 standard.

Description

technical field [0001] The present invention relates to an environment-friendly metal carboxylate, and the present invention also relates to a preparation method of the metal carboxylate. Background technique [0002] At present, there are four preparation methods of straight-chain saturated fatty carboxylic acid metal salts, traditional metathesis method, metathesis one-step method, semi-melting method and direct method. [0003] The traditional metathesis method is also known as the two-step method, and the whole reaction is carried out in the aqueous phase, commonly known as the water washing method or the wet method. First, add NaOH aqueous solution to the molten fatty carboxylic acid to react to generate sodium fatty acid (soluble in water), then replace the sodium ion with inorganic metal ion, and obtain the finished product by centrifugal drying. [0004] The one-step metathesis method is an improvement on the basis of the traditional metathesis method. The reaction ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C53/126C07C51/41
Inventor 李绪邦郭向荣王海
Owner BELIKE CHEM
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