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Method for preparing higher fatty acid alkali salt

A technology of higher fatty acid and alkaline earth metal, which is applied in the preparation of calcium salt, strontium salt, and the field of higher fatty acid magnesium salt, can solve the problem of no clear description, and achieve the effect of saving energy, simple equipment and ensuring energy saving.

Active Publication Date: 2011-05-25
BELIKE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, it is not clearly stated in the patent whether it is necessary to remove the water added and the water generated by the reaction.

Method used

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  • Method for preparing higher fatty acid alkali salt
  • Method for preparing higher fatty acid alkali salt

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Embodiment 1: the preparation method of magnesium stearate

[0021] 100 kilograms of stearic acid (acid value 210), heated to 80 DEG C, added 8.2 kilograms of magnesium oxide (96%) micropowder, premixed, dispersed, and then preheated to 80 DEG C containing catalyst (acetic acid 0.06kg), moistening Wet agent (sodium lauryl sulfate 0.12kg) aqueous solution 20kg, continuously fed into the high-speed mixer that can control the premixing time, the premixing time is about 20 seconds, and then continuously output to the heat preservation machine that has been preheated to 80-90°C In the tank, keep warm for 2 hours, and after pulverization, the target product can be obtained. Its quality indicators are: magnesium oxide content 7.5%, free acid ≤ 1%, heating loss ≤ 3%, melting point ≥ 120°C, fineness ≤ 75μm.

[0022] Note: The stearic acid (acid value 210) used in this example is a mixed acid with a hexadecanoic acid content of 60% and an octadecanoic acid content of 40%, so the...

Embodiment 2

[0023]Embodiment 2: the preparation method of magnesium stearate

[0024] Stearic acid (acid value 210) 100 kilograms, is heated to 80 ℃, adds 11.5 kilograms of magnesium hydroxide (98%) micropowders, premixes, disperses, and then preheats to 80 ℃ containing catalyst (hydrogen peroxide 0.2kg), Wetting agent (potassium laurate 0.12kg) aqueous solution 20kg, continuously fed into the high-speed mixer capable of controlling the premixing time, the premixing time is about 15 seconds, and then continuously output to the insulation tank that has been preheated to 80-90°C , kept warm for 2 hours, and after pulverization, the target product was obtained. Its quality indicators are: magnesium oxide content 7.5%, free acid ≤ 1%, heating loss ≤ 3%, melting point ≥ 120°C, fineness ≤ 75μm.

Embodiment 3

[0025] Embodiment 3: the preparation method of calcium stearate

[0026] Stearic acid (acid value 210) 100 kilograms, is heated to 75 ℃, adds 12.1 kilograms of calcium oxide (89%) micropowders, premixes, disperses, and then preheats to 80 ℃ containing catalyst (p-toluenesulfonic acid 0.04kg), wetting agent (20kg of aqueous solution of diisooctyl alcohol succinate sodium sulfonate 0.06kg), continuously feed into the high-speed mixer that can control the premixing time, the premixing time is about 15 seconds, and then continuously output to Preheated to 80 ~ 90 ℃ insulation tank, heat preservation for 2 hours, after pulverization, the target product can be obtained. Its quality indicators are: calcium content 7.0%, free acid ≤ 1%, heating loss ≤ 3%, melting point ≥ 150°C, fineness ≤ 75μm.

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Abstract

The invention discloses a preparation method of a powdery higher fatty acid alkaline earth metal salt, which comprises the following steps: pre-mixing and dispersing fused higher fatty acid and micro-powdery alkaline earth metal oxide or hydrate, continuously feeding into a high-speed mixer capable of controlling the pre-mixing time together with a water solution containing a catalyst and a moistening agent, continuously outputting to a heat-insulation tank, keeping for a certain period of time at the proper temperature, and pulverizing to obtain the powdery higher fatty acid alkaline earth metal salt product, wherein the higher fatty acid is C8-C22 saturated fatty acid, the particle diameter of the alkaline earth metal oxide or the hydroxide micropowder is 1-50 micron, the dosage of the catalyst accounts for 0.01%-1% of the fatty acid dispersion by weight. The preparation method has the advantages of simple process, simple equipment, mild reaction conditions, energy saving, and higher purity of the product.

Description

technical field [0001] The present invention relates to a high-grade fatty acid magnesium salt mainly used in the fields of pharmacy, cosmetics, plastics, paint industry, tablet excipient, powder cosmetic adhesion and lubricant, plastic heat stabilizer and lubricant, paint transparent matting agent, etc. , the preparation method of calcium salt, strontium salt. Background technique [0002] There are currently four main methods for the preparation of polyvalent metal salts of higher fatty acids: double decomposition method, melting method, semi-melting method, and direct method. The metathesis method is to add an aqueous solution of inorganic metal salt to the aqueous solution of fatty acid sodium salt, replace sodium ions with inorganic metal ions, and then wash and dry to obtain the product; the melting method is to melt fatty acid and metal oxide or hydroxide in place At a temperature above the melting point of the generated fatty acid salt, it reacts in a molten state t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C53/126C07C51/41
Inventor 张立军张惠明周明生李绪邦郭向荣杨剑
Owner BELIKE CHEM
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