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Method for preparing higher fatty acid alkali salt

A high-grade fatty acid and alkaline earth metal technology, which is applied in the preparation of high-grade fatty acid magnesium salt, strontium salt, and calcium salt, can solve problems such as no clear instructions, and achieve energy saving, simple equipment, and energy-saving effects

Active Publication Date: 2009-01-07
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

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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 magnesium hydroxide (98%) micropowder 11.5 kilograms, 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] 100 kilograms of stearic acid (acid value 210), heated to 75 ℃, added 12.1 kilograms of calcium oxide (89%) micropowder, premixed, dispersed, and then preheated 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 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 a powdery higher fatty acid alkaline earth metal salt product. 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 Applications(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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