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Production method of fatty alcohol-polyoxyethylene ether

A technology of alcohol polyoxyethylene ether and production method, which is applied in the preparation of ether from alkylene oxide, chemical instruments and methods, preparation of ether, etc., and can solve the problems of low content of volatile organic compounds and high content of volatile organic compounds

Active Publication Date: 2020-07-28
SHANGHAI DUOLUN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to solve the problem in the prior art that the content of fatty alcohol polyoxyethylene ether volatile organic compounds (VOC for short) obtained by the reaction of fatty alcohol and ethylene oxide under basic catalytic conditions is high, and provides a fatty alcohol A production method of polyoxyethylene ether, which has the advantage of low content of volatile organic compounds in the obtained fatty alcohol polyoxyethylene ether product

Method used

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  • Production method of fatty alcohol-polyoxyethylene ether
  • Production method of fatty alcohol-polyoxyethylene ether
  • Production method of fatty alcohol-polyoxyethylene ether

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Put 100g of dodecanol, 0.5g of potassium hydroxide, and 0.5g of sodium borohydride into a stirred 1-liter high-pressure reactor, seal the high-pressure reactor, start stirring, and replace nitrogen three times. Pressure evacuation and dehydration for 30 minutes, then feed ethylene oxide into the reactor, control the reaction temperature at 145°C and the reaction pressure at 0.20MPa, until the total amount of fed ethylene oxide is 213g, stop feeding ethylene oxide , and then maintain the reaction temperature until the pressure of the reactor no longer drops, indicating that the aging reaction is completed, the temperature is lowered to 100 ° C, -0.096 MPa vacuum for 10 minutes, the temperature is cooled to 75 ° C, and the pH is neutralized to 7.5 with acetic acid to obtain twelve Alcohol polyoxyethylene (9) ether products.

[0058] The residual amount of volatile organic compounds in the lauryl alcohol polyoxyethylene (9) ether product was measured to be 14.6 mg kg -1 ....

Embodiment 2

[0060] Put 100g of dodecyl alcohol, 0.5g of potassium hydroxide, and 0.5g of tri-sec-butyl sodium borohydride into a stirred 1-liter high-pressure reactor, seal the high-pressure reactor, start stirring, and replace nitrogen three times, at a temperature of 100°C and The pressure of -0.096MPa was evacuated and dehydrated for 30 minutes, and then ethylene oxide was passed into the reactor, and the reaction temperature was controlled at 145°C and the reaction pressure was 0.20MPa until the total amount of ethylene oxide was 213g, and then stopped. Ethylene oxide, then maintain the reaction temperature until the pressure of the reactor no longer drops, indicating that the aging reaction is completed, lower the temperature to 100°C, vacuumize at -0.096MPa for 10 minutes, cool the temperature to 75°C, and neutralize the pH to 7.5 with acetic acid , to obtain polyoxyethylene lauryl alcohol (9) ether product.

[0061] The residual amount of volatile organic compounds in the lauryl al...

Embodiment 3

[0063] Put 100g of dodecyl alcohol, 0.5g of potassium hydroxide, and 0.5g of disodium stannous citrate into a stirred 1-liter high-pressure reactor, seal the high-pressure reactor, start stirring, and replace nitrogen three times, at a temperature of 100°C and - The pressure of 0.096MPa was evacuated and dehydrated for 30 minutes, then ethylene oxide was passed into the reactor, the controlled reaction temperature was 145°C and the reaction pressure was 0.20MPa, until the total amount of ethylene oxide passed into was 213g, and the loop was stopped. Oxyethane, then maintain the reaction temperature until the pressure of the reactor no longer drops, indicating that the aging reaction is completed, lower the temperature to 100°C, vacuumize at -0.096MPa for 10 minutes, cool the temperature to 75°C, and neutralize with acetic acid to a pH of 7.5. Obtain lauryl alcohol polyoxyethylene (9) ether product.

[0064] The residual amount of volatile organic compounds in the lauryl alcoho...

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Abstract

The invention relates to a production method of fatty alcohol-polyoxyethylene ether. The method mainly solves the problem of high residual quantity of volatile organic compounds in a fatty alcohol-polyoxyethylene ether product obtained by reacting fatty alcohol with ethylene oxide in the presence of a basic catalyst in the prior art. According to a technical scheme in the invention, the productionmethod of the fatty alcohol-polyoxyethylene ether comprises the following step: in the presence of a catalyst, reacting fatty alcohol with ethylene oxide to obtain fatty alcohol-polyoxyethylene ether, wherein the catalyst comprises (1) a main catalyst and (2) a cocatalyst, the main catalyst comprises at least one selected from the group consisting of alkali metal hydroxides and alkali metal alkoxides, and the cocatalyst comprises at least one selected from the group consisting of (a) an alkali metal borohydride, (b) an alkali metal trialkylborohydride and (c) a stannous tricarboxylate dialkali metal salt.

Description

technical field [0001] The invention relates to a production method of fatty alcohol polyoxyethylene ether. Background technique [0002] Fatty alcohol polyoxyethylene ether (AEO), also known as polyoxyethylene fatty alcohol ether, is the fastest growing and most used variety of nonionic surfactants. This type of surfactant is an ether formed by condensation of polyethylene glycol (PEG) and fatty alcohol, represented by the following general formula: RO(CH2CH2O)nH, where n is the degree of polymerization, due to the polymerization of polyethylene glycol There are different varieties depending on the degree and type of fatty alcohol. The number of ethoxy groups in fatty alcohol polyoxyethylene ether molecules can be adjusted artificially during the synthesis process, so a series of nonionic surfactants with different properties and uses can be prepared. Fatty alcohol polyoxyethylene ether is the most important class of nonionic surfactants. The ether bond in the molecule i...

Claims

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Application Information

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IPC IPC(8): C07C41/03C07C43/11C08G65/28B01J23/04B01J31/02B01J31/04B01J31/26
CPCC07C41/03C08G65/2609C08G65/269B01J23/04B01J31/04B01J31/0272B01J31/26B01J35/19C07C43/11
Inventor 李翔钟敏王建臣张怀哲侯海育
Owner SHANGHAI DUOLUN CHEM
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