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Narrow distribution gemini surfactant and preparation method thereof

A technology of gemini surface and active agent, applied in the field of narrow distribution gemini surfactant and its preparation, can solve the problems of poor product performance synthesis method, unable to guarantee the stability of alkynyl group, wide product molecular weight distribution, etc., and achieve the alkynyl group retention rate Low, improve the narrow distribution characteristics, the effect of strong alkalinity

Inactive Publication Date: 2018-07-24
WUHAN OXIRAN SPECIALTY CHEM CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method cannot guarantee the stability of the alkynyl group, and the sodium fluoride used is toxic, which is not conducive to its downstream application
[0004] Chinese Invention Patent Publication No. CN102304029A and Chinese Invention Patent Publication No. CN103965461B both disclose the use of traditional organic tertiary amines as catalysts for synthesis. This type of catalyst has low activity and the prepared product has a wide molecular weight distribution, and the product performance is worse than that of this patent. Reported synthesis method

Method used

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  • Narrow distribution gemini surfactant and preparation method thereof
  • Narrow distribution gemini surfactant and preparation method thereof
  • Narrow distribution gemini surfactant and preparation method thereof

Examples

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Effect test

Embodiment 1

[0029] Add 1 mol of acetylenic diol and 5 g of 1,8-diazabicycloundec-7-ene (DBU) into a 1 L stirred autoclave, check the airtightness of the reactor, and wait for 1 hour After there is no pressure drop in the interior, carry out nitrogen replacement and vacuuming operations at 50°C to ensure that the vacuuming time is greater than 30 minutes, and the number of high-purity nitrogen replacement operations is 5 times. Feed ethylene oxide, control the reaction temperature to be 120°C±3°C and the reaction pressure to be 0.3MPa~0.5MPa, stop feeding ethylene oxide until the total amount of ethylene oxide passed is 10mol, and carry out the product Post-treatment Aging Maintain the temperature of the reactor at 120°C±3°C until the pressure of the reactor no longer drops, indicating that the aging reaction is completed. Lower the temperature to 60°C, neutralize with glacial acetic acid and remove the low boiling point to obtain a narrow distribution gemini surfactant.

[0030] The stru...

Embodiment 2

[0032] Add 1 mol of acetylenic diol and 5 g of 1,8-diazabicycloundec-7-ene (DBU) in a 1 L stirred autoclave, and check the airtightness of the reactor. After there is no pressure drop within 1 hour, carry out nitrogen replacement and vacuuming operations at 50°C to ensure that the vacuuming time is greater than 30 minutes, and the number of high-purity nitrogen replacement operations is 5 times. Feed ethylene oxide into the kettle, control the reaction temperature to be 90°C±3°C and the reaction pressure to be 0.3MPa~0.5MPa, stop feeding ethylene oxide until the total amount of ethylene oxide is 10mol. After the product is processed and aged, the temperature of the reactor is maintained at 90°C ± 3°C until the pressure of the reactor no longer drops, indicating that the aging reaction is completed. Lower the temperature to 60°C, neutralize with glacial acetic acid and remove the low boiling point to obtain a narrow distribution gemini surfactant.

Embodiment 3

[0034] Add 1 mol of acetylene diol and 2.5 g of 1,4-diazabicyclo[2.2.2]octane (ABCO) and 2.5 g of 1,4-diazobicyclo[ 2.2.2] Octane (DABCO) was used as a catalyst to check the airtightness of the reactor. After the reactor did not experience pressure drop within 1 hour, it was replaced with nitrogen and vacuumed at 50°C to ensure that the reactor was vacuumed. The vacuum time is greater than 30min, the number of high-purity nitrogen replacement operations is 5 times, the pressure is exhausted to 0-30KPa, and then ethylene oxide is introduced into the reactor, and the reaction temperature is controlled at 00°C±3°C and the reaction pressure is 0.3MPa-0.5 MPa, stop feeding ethylene oxide until the total amount of ethylene oxide fed is 10mol, and carry out post-treatment aging on the product to maintain the temperature of the reactor at 90°C±3°C until the pressure of the reactor no longer drops, indicating completion ripening reaction. Lower to 60°C, neutralize with glacial acetic ...

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Abstract

The invention discloses a narrow distribution gemini surfactant and a preparation method of the surfactant. The preparation method comprises the following steps: uniformly mixing alkyne glycol and ethylene oxide at a mole ratio of 1 to 1-20, adding an azacyclo catalyst into a system for addition reaction at 50-120 DEG C and 0.3-0.8MPa, and generating the narrow distribution gemini surfactant. Thenarrow distribution gemini surfactant overcomes the problems of a deep color and a low alkynyl retention rate of the traditional catalyst, and improves a narrow distribution characteristic of a product. The invention further provides the preparation method of the narrow distribution gemini surfactant.

Description

technical field [0001] The invention relates to the technical field of surfactants, in particular to a narrow distribution gemini surfactant and a preparation method thereof. Background technique [0002] Gemini surfactant has less dosage and is easy to form various forms on the gas-liquid surface. At the same time, it only needs to add 1‰ to achieve the double effect of wetting and defoaming. It solves the problem that traditional defoamers tend to be oily and water-soluble. Well, there are many disadvantages such as large molecular weight and poor wetting force. [0003] The Chinese Invention Patent Publication No. CN103601881A discloses a mixture of one or more of potassium hydroxide, sodium hydroxide, and sodium fluoride as a catalyst. This method cannot guarantee the stability of the alkynyl group, and the sodium fluoride used is toxic, which is not conducive to its downstream application. [0004] Chinese Invention Patent Publication No. CN102304029A and Chinese Inve...

Claims

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Application Information

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IPC IPC(8): B01F17/42C07C41/03C07C43/178C09K23/42
CPCC07C41/03C09K23/00
Inventor 付远波王亮任凡张静潘琦付艳梅刘敏
Owner WUHAN OXIRAN SPECIALTY CHEM CO
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