Preparation process of alkanolamide

A technology for alkanolamide and preparation process is applied in the field of preparation of high-purity alkanolamide, can solve the problems of complex process flow, high cost, large investment and the like, and achieves the effects of simple process, low cost and good quality

Inactive Publication Date: 2010-07-14
CHINA RES INST OF DAILY CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technological process is relatively complex, with high energy consumption, large investment and high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1, take methyl cocoate and N-methyl monoethanolamine as raw material synthesis alkanolamide

[0015] Add 90 grams of methyl cocoate, 31 grams of N-methyl monoethanolamine and 0.605 grams of sodium methoxide into a four-necked flask with a thermometer and a stirrer, raise the temperature to 50 ° C, vacuumize to a residual pressure of 50 mmHg and react for 4 hours , Break the air, add 2.13 g of p-toluenesulfonic acid and stir for 0.5 hours, and evaporate the excess amine to obtain the product. After analysis, the content of N-methyl monoethanolamine is 0.12%, and the content of coconut oil N-methyl monoethanolamide is 98.65%.

Embodiment 2

[0016] Embodiment 2, take ethyl cocoate and N-methyl monoethanolamine as raw material synthesis alkanolamide

[0017] Add 90 grams of ethyl cocoate, 29 grams of N-methyl monoethanolamine and 0.357 grams of sodium ethoxide to the above equipment, heat up to 90 ° C, vacuumize to a residual pressure of 60 mmHg for 4 hours, break the air, and add 1.75 grams of twelve The alkylbenzenesulfonic acid was stirred for 0.5 hour, and the excess amine was evaporated to obtain the product. According to product analysis, the content of coconut oil N-methyl monoethanolamide is 98.23%.

Embodiment 3

[0018] Embodiment 3, take methyl laurate and N-methyl monoethanolamine as raw material synthesis alkanolamide

[0019] Add 80 grams of methyl laurate, 55 grams of N-methyl monoethanolamine and 0.405 grams of sodium methoxide to the above equipment, heat up to 90 ° C, vacuumize to a residual pressure of 60 mmHg and react for 3 hours, break the air, add 0.74 grams of sulfuric acid and stir for 0.5 Hours, the excess amine was distilled off to obtain the product. After analysis of the product, the content of lauric acid N-methyl monoethanolamide is 98.54%.

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PUM

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Abstract

The invention relates to a preparation process of alkanolamide, which comprises the following steps: the mol ratio of fatty acid ester and alkanolamine is 1: 1.1 to 2, the fatty acid ester and the alkanolamine are added into a reaction kettle according to the mol ratio, then alkaline catalyst is added into the reaction kettle, the addition quantity of the alkaline catalyst is 2 to 5 permillage ofthe total weight of the fatty acid ester and the alkanolamine, the temperature inside the reaction kettle is 50 to 100 DEG C, the reaction kettle is vacuum pumped to the residual pressure of 50 to 80mmHg, and after the reaction of 2 to 4 hours, an alkanolamide rough product is generated, a neutralizing agent is added, and after the pressure is released, excess alkanolamine is steamed, so the alkanolamide is obtained. The preparation process has the advantages of simple process, low energy consumption and high purity of the product.

Description

technical field [0001] The invention relates to a preparation process of high-purity alkanolamides. technical background [0002] Alkanolamides have excellent thickening, foam stabilization, good ability to suspend dirt and anti-redeposition, and have certain antirust and antistatic ability, and can play a good synergistic effect when compounded with other surfactants , has strong hydrolysis resistance, low toxicity, good biodegradability, and does not irritate the skin. It is an excellent non-ionic surfactant and is widely used in the fields of daily chemicals, textiles and metal cleaning. It is also used for further synthesis of other surfactants agent intermediates. [0003] Alkanolamides are mainly prepared by condensation reaction of oil, fatty acid or fatty acid methyl ester with diethanolamine or monoethanolamine. The alkyl group in its structure is usually coconut oil or palm kernel oil base, palm oil or soybean oil base, etc. The products mainly include There are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C231/02C07C233/18
Inventor 杨秀全白亮程玉梅
Owner CHINA RES INST OF DAILY CHEM IND
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