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Purification of fatty acid amide by acid treatment

A technology of acid treatment method and acid treatment agent, which is applied in the field of purification process of alkanolamide, and can solve the problem of rodent carcinogenicity and so on

Inactive Publication Date: 2005-10-12
ZANYU TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current production of alkanolamides is mostly a direct synthesis method. According to the composition of different products of the raw materials used, the products without purification generally contain impurities such as free alkanolamines and pigments. Free alkanolamines are irritating, and In recent years, studies have shown that free diethanolamine has obvious carcinogenic effects on mice

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] The material after the amidation reaction of oil and monoethanolamine is acid-treated by the method shown in the present invention, and the composition and dosage of the acid treatment agent are calculated according to the percentage of the weight of the material, and are mixed uniformly before use.

[0010] Phosphoric acid 3%

[0011] water 3%

[0012] Acid treatment can be carried out directly in the amidation reaction kettle, control the temperature of the material at 70-90°C, suck the acid solution with vacuum, stir for 30 minutes, rest for 50 minutes to separate layers, separate the lower water phase, and vacuum dehydrate until the amide content is greater than 98 % is enough.

Embodiment 2

[0014] The material after the amidation reaction of fatty acid and monoethanolamine is acid-treated by the method shown in the present invention, the composition and dosage of the acid treatment agent are calculated according to the weight percentage of the material, mixed uniformly and then set aside.

[0015] Sulfuric acid 5%

[0016] water 15%

[0017] Acid treatment can be carried out directly in the amidation reaction kettle, control the temperature of the material at 70-90°C, suck the acid solution with vacuum, stir for 30 minutes, rest for 50 minutes to separate layers, separate the lower water phase, and vacuum dehydrate until the amide content is greater than 98 % is enough.

Embodiment 3

[0019] The material after the amidation reaction of the fatty acid and diethanolamine is acid-treated by the method shown in the present invention, the composition and amount of the acid treatment agent are calculated according to the percentage of the weight of the material, mixed uniformly and then used for later use.

[0020] Oxalic acid 7%

[0021] water 50%

[0022] Acid treatment can be carried out directly in the amidation reaction kettle, control the temperature of the material at 50-70°C, add the acid solution directly from the feeding port or use a vacuum to inhale the acid solution, stir for 40 minutes, stand still for 60 minutes to separate layers, separate the lower aqueous phase and then vacuum Dehydration until the amide content is greater than 98%.

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PUM

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Abstract

Purification of acidamide alkoxide by acid treatment is carried out by dissolving reactant of acid treating agent and alkanolamine into water, taking water as solvent, separating free alkanolamine and soluble impurities and coloring matter from acidamide alkoxide, adding acid treating agent mixed with acid and water into reactor of acidamide alkoxide proportionally, agitating for 1-30mins, laying aside for 10-60mins with proportion of acid and material in acid treating agent 0.1-50%, water and material 1-50%, at 0-95deg.C, separating under water phase from reactor bottom, and vacuum dewatering. It achieves high content of acidamide alkoxide.

Description

(1) Technical field: [0001] The invention relates to a purification process of alkanolamides. (two) background technology: [0002] Alkanolamides are the reaction products of primary or secondary alkanol amines with fatty acids, fatty acid methyl esters or triglycerides such as coconut oil, palm kernel oil, etc. It is a non-ionic surfactant with good wetting, foam increasing, foam stabilizing, thickening, lubricating, softening, skin care, emulsifying and anti-corrosion properties. It is widely used in daily necessities and industrial additives. The main fatty acid alkanolamides are: fatty acid monoethanolamide, fatty acid diethanolamide, fatty acid monoisopropanolamide, etc. [0003] The current production of alkanolamides is mostly a direct synthesis method. According to the composition of different products of the raw materials used, the products without purification generally contain impurities such as free alkanolamines and pigments. Free alkanolamines are irritating, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C231/24
Inventor 黄亚茹方银军夏雄燕冯晚静方灵丹张义勇葛赞
Owner ZANYU TECH GRP CO LTD