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Method for synthesizing ethylene bisstearamide by using stearic acid

A technology of ethylene bisstearic acid amide and stearic acid, which is applied in the direction of carboxylic acid amide preparation, carboxylic acid amide separation/purification, chemical instruments and methods, etc., and can solve incomplete reaction, dull color, and influence on product sales, etc. problems, to achieve the effect of simple process, shortened reaction time, and product color retention

Inactive Publication Date: 2014-06-25
QINGDAO SHUAIWANG OIL CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional stearic acid is synthesized ethylene stearate ester, and its process temperature condition is low temperature, can cause incomplete reaction, reduces yield: secondly, the product that finally draws is because the oxidation in the reaction process makes its color dim , affecting product sales

Method used

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Embodiment 1

[0008] A method for synthesizing ethylene bisstearic acid amide with stearic acid, is characterized in that: described step is as follows: add stearic acid, antioxidant and catalyst sodium phosphate in flask, feed nitrogen at large flow rate, after one minute Reduce the flow rate to 2-4 bubbles / second, then heat the stearic acid to melt, when the temperature rises to 90 degrees Celsius, start to add ethylenediamine dropwise, keep it warm for 2 hours to complete the reaction; then raise the temperature to 250 degrees Celsius , and reacted for 2 hours to complete the high temperature reaction and dehydration process.

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Abstract

The invention discloses a method for synthesizing ethylene bisstearamide by using stearic acid. The method comprises the following steps: adding stearic acid, an antioxidant and a catalyst sodium phosphate into a flask, introducing nitrogen in a bulk flow manner, adjusting the flow to 2-4 bubbles / s 1min later, heating stearic acid to melt stearic acid, adding ethylene diamine in a dropwise manner when the temperature rises to 90DEG C, and carrying out heat insulation for 2h after the dropwise addition of ethylene diamine in order to complete a reaction; and heating to 250DEG C, and reacting for 2h in order to complete a high temperature reaction and a dehydration process. The method has the advantages of simple process, reaction time shortening, and maintenance of the good color of a product.

Description

technical field [0001] The invention relates to a method for synthesizing ethylene bisstearic acid amide with stearic acid. Background technique [0002] Traditional stearic acid is synthesized ethylene stearate ester, and its process temperature condition is low temperature, can cause incomplete reaction, reduces yield: secondly, the product that finally draws is because the oxidation in the reaction process makes its color dim , affecting product sales. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for synthesizing ethylene bisstearic acid amide with stearic acid. [0004] In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is: [0005] A method for synthesizing ethylene bisstearic acid amide with stearic acid, is characterized in that: described step is as follows: add stearic acid, antioxidant and catalyst sodium phosphate in...

Claims

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Application Information

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IPC IPC(8): C07C233/36C07C231/02C07C231/22
Inventor 王明夫
Owner QINGDAO SHUAIWANG OIL CHEM