Preparation method of secondary alcohol ethoxylate

A technology of secondary alcohol polyoxyethylene ether and polyoxyethylene ether, which is applied in the field of preparation of secondary alcohol polyoxyethylene ether and can solve the problems of low PEG content of secondary alcohol polyoxyethylene ether and high PEG content of crude products

Active Publication Date: 2017-08-08
SHANGHAI DUOLUN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention mainly solves the technical problem of high PEG content in the crude product obtained by the existing secondary alcohol polyoxyethylene ether preparation method, and

Method used

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  • Preparation method of secondary alcohol ethoxylate

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Effect test

Embodiment 1

[0043]Add 1 mole of C13 secondary alcohol and 0.34 g of boron trifluoride into a 1 L stirred autoclave, seal the autoclave, and start stirring. Use nitrogen to replace the air in the reactor for three times, then feed ethylene oxide into the reactor, control the reaction temperature at 70°C and the reaction pressure at 0.2MPa, until the total amount of ethylene oxide fed is 3 moles, that is, synthesis C13 secondary alcohol polyoxyethylene (3) ether, until the pressure of the reactor no longer drops, it indicates that the aging reaction is completed, and the crude product of secondary alcohol polyoxyethylene (3) ether is obtained, the temperature is lowered and maintained at 50 ° C, and 1.5 times the amount of secondary alcohol polyoxyethylene (3) ether is added. Calcium hydroxide powder of the boron trifluoride gram equivalent number in the crude product of oxyethylene (3) ether, stirred for 2 hours, with 1.5 times of the boron trifluoride gram equivalent number in the secondar...

Embodiment 2

[0046] Add 1 mole of C13 secondary alcohol and 0.34 g of boron trifluoride into a 1 L stirred autoclave, seal the autoclave, and start stirring. Use nitrogen to replace the air in the reactor for three times, then feed ethylene oxide into the reactor, control the reaction temperature at 70°C and the reaction pressure at 0.2MPa, until the total amount of ethylene oxide fed is 3 moles, that is, synthesis C13 secondary alcohol polyoxyethylene (3) ether, until the pressure of the reactor no longer drops, it indicates that the aging reaction is completed, and the crude product of secondary alcohol polyoxyethylene (3) ether is obtained, the temperature is lowered and maintained at 50 ° C, and 1.5 times the amount of secondary alcohol polyoxyethylene (3) ether is added. The magnesium hydroxide powder of the boron trifluoride gram equivalent number in the crude product of oxyethylene (3) ether, stirred for 2 hours, with 1.5 times of the boron trifluoride gram equivalent number in the s...

Embodiment 3

[0049] Add 1 mole of C13 secondary alcohol and 0.34 g of boron trifluoride into a 1 L stirred autoclave, seal the autoclave, and start stirring. Use nitrogen to replace the air in the reactor for three times, then feed ethylene oxide into the reactor, control the reaction temperature at 70°C and the reaction pressure at 0.2MPa, until the total amount of ethylene oxide fed is 3 moles, that is, synthesis C13 secondary alcohol polyoxyethylene (3) ether, until the pressure of the reactor no longer drops, it indicates that the aging reaction is completed, and the crude product of secondary alcohol polyoxyethylene (3) ether is obtained, the temperature is lowered and maintained at 50 ° C, and 1.5 times the amount of secondary alcohol polyoxyethylene (3) ether is added. The barium hydroxide powder of the boron trifluoride gram equivalent number in the crude product of oxyethylene (3) ether, stirred 2 hours, with 1.5 times of the boron trifluoride gram equivalent number in the secondar...

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Abstract

The invention relates to a preparation method of secondary alcohol ethoxylate. According to an adopted technical scheme, the method includes the steps of: in the presence of an acidic catalyst, reacting secondary alcohol with ethylene oxide to obtain a secondary alcohol ethoxylate crude product; mixing a first treatment agent with the crude product to obtain an intermediate material I; mixing a second treatment agent with the intermediate material I to obtain an intermediate material II; filtering the intermediate material II to obtain filtrate; mixing the filtrate with water, conducting standing layering above the turbidity point of secondary alcohol ethoxylate to obtain an oil phase; and removing impurity water from the oil phase, thus obtaining a refined secondary alcohol ethoxylate product. Specifically, the first treatment agent is selected from at least one of lithium hydroxide, calcium hydroxide, calcium oxide, calcium carbonate, barium hydroxide, barium oxide, magnesium oxide, magnesium hydroxide, strontium hydroxide and strontium oxide; and the second treatment agent is selected from at least one of potassium hydroxide, sodium hydroxide, sodium methoxide, potassium methoxide, sodium ethoxide and sodium carbonate.

Description

technical field [0001] The invention relates to a method for preparing secondary alcohol polyoxyethylene ether, in particular to a method for preparing secondary alcohol polyoxyethylene ether with low PEG content through polymerization reaction of C8-C18 secondary alcohol and ethylene oxide as raw materials. Background technique [0002] Secondary alcohol polyoxyethylene ether is an almost colorless, odorless, transparent liquid at room temperature. Its pour point and viscosity are lower than those of primary alcohol nonionic surfactants, and it is easy to use. Secondary alcohol polyoxyethylene ether has a wide range of applications, and the depth and breadth are constantly expanding, and the market demand is growing rapidly. Limited by technology and scale, the current situation is basically poor quality, low quantity, and high price. If it is resolved, it will increase the core competitiveness of domestic products. [0003] Domestically, in the epoxidation of secondary al...

Claims

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Application Information

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IPC IPC(8): C07C41/03C07C41/34C07C43/11
CPCC07C41/03C07C41/34C07C43/11
Inventor 徐兴建舒建生张江锋侯海育王建臣李翔
Owner SHANGHAI DUOLUN CHEM
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