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Synthesis method of ethoxylated tetrahydrofurfuryl alcohol

A technology of ethoxylated tetrahydrofurfuryl alcohol and a synthesis method, which is applied in the synthesis field of ethoxylated tetrahydrofurfuryl alcohol, can solve the problems of increasing environmental pollution, affecting downstream application performance, difficult color and luster, and improving production efficiency , the effect of shortening synthesis time and reducing energy consumption

Inactive Publication Date: 2019-02-26
ZHEJIANG HUANGMA TECH +1
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  • Summary
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  • Description
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AI Technical Summary

Problems solved by technology

However, because it uses a strong base as a catalyst, the resulting product has a deep color and is not easy to control, which affects its downstream application performance; in addition, the use of acetone will increase the environmental pollution problem to a certain extent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0044] 1) Add tetrahydrofurfuryl alcohol 102g, solid sodium hydroxide 3.0g, acetone 100g in the reaction kettle, vacuumize with vacuum pump, adopt N 2 After that, remove the air in the reactor and replace it three times, then raise the temperature to 58°C under the vacuum degree ≥ -0.02Mpa and start collecting the distilled liquid. Vacuum, close the vacuum valve; 2) start to add ethylene oxide continuously, control the reaction temperature at 60-80°C, and the pressure in the reactor at 0.1-0.55Mpa, add 440g of ethylene oxide in total. After adding, keep warm and continue to react until the pressure no longer changes. After the reaction is completed, low-boiling substances are removed by vacuum, and 3.1 g of glacial acetic acid is added at a temperature of 60-100° C. to neutralize for 10 minutes before discharging.

[0045] Compared with the synthesis process of Example 6, the comparison example has three steps of dehydration step, acetone solvent removal step and glacial acet...

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Abstract

The invention relates to a synthesis method of ethoxylated tetrahydrofurfuryl alcohol, wherein the synthesis method comprises the following steps: 1) firstly, putting a Lewis acid catalyst into a high-pressure reaction kettle, and then replacing air in the kettle with nitrogen gas; 2) then pressing tetrahydrofurfuryl alcohol into the reaction kettle in a pipeline manner; 3) opening stirring and steam heating, and heating a reaction material to 30-80 DEG C; 4) introducing ethylene oxide with the amount 1-20 times the molar number of tetrahydrofurfuryl alcohol into the reaction kettle; and 5) carrying out reaction until the pressure in the reaction kettle remains unchanged, removing residual trace ethylene oxide in the reaction kettle, and discharging. The synthesis method has the beneficialeffects: 1, with the use of the Lewis acid catalyst obtained from one or two combinations of anhydrous zinc chloride and anhydrous aluminum chloride, the reaction efficiency can be effectively improved, the synthesis time is shortened, the production efficiency is improved, and the synthesized product has light color and luster; and 2, the method does not use acetone or other solvents in the synthesis process so as to reduce the impact on the ecological environment and reduce energy consumption.

Description

technical field [0001] The invention relates to a method for synthesizing ethoxylated tetrahydrofurfuryl alcohol, which belongs to the technical field of organic polymer compounds. Background technique [0002] Ethoxylated tetrahydrofurfuryl alcohol, the appearance is light yellow to colorless transparent liquid, soluble in water, ethanol, toluene and other solvents, itself is also a good solvent. After the addition of tetrahydrofurfuryl alcohol and ethylene oxide, tetrahydrofurfuryl alcohol becomes a special-purpose surfactant. According to the number of added ethylene oxide, the performance of the obtained product is also different, and it can be used as an emulsifier , wetting agent, penetrating agent, etc.; at the same time, it has good lipophilicity and hydrophilicity, which can be used as an excellent solvent in the field of resin and coating industries. Through literature review, it is reported in the patent CN 101190182 A that ethoxylated tetrahydrofurfuryl alcohol ...

Claims

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Application Information

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IPC IPC(8): C08G65/28
CPCC08G65/2606
Inventor 张雨金一丰马定连王月芬余江
Owner ZHEJIANG HUANGMA TECH
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