A kind of synthetic method for controlling the addition distribution of isomeric tridecanol polyoxyethylene ether

A technology of isotridecanol and polyoxyethylene ether, applied in chemical instruments and methods, detergent compositions, surface active detergent compositions, etc., can solve the problem of non-maximum value, wide molecular weight distribution, and generation of anionic active species Slow speed and other problems, to achieve the effect of narrow cloud point variation range, narrow molecular weight distribution and excellent performance

Active Publication Date: 2017-09-22
SHENYANG HAOBO IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the traditional process conditions, the solid basic catalyst is directly added to the initiator. Since the anionic active species of the catalyst cannot be well dispersed, the formation rate of the anionic active species is slow, and the concentration of the active species is not the maximum, resulting in polymerization. The active species formed first in the process and ethylene oxide form a chain segment first, and the isomeric tridecyl alcohol cannot grow synchronously, so the molecular weight distribution of the product is generally wide

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Take by weighing 3 grams of barium hydroxide, 15 grams of propylene glycol, dissolve barium hydroxide in propylene glycol in a sonicator, and ultrasonically disperse for 5 minutes to obtain liquid barium hydroxide. The catalyst requires fresh preparation in 24 small tests. Put 18 grams of liquid barium hydroxide and 300 grams of isomeric tridecyl alcohol into a 2L high-pressure reactor. After sealing the reactor, replace the air in the reactor with nitrogen, and heat the reactor to 80°C under the protection of nitrogen. , the catalyst solvent and low boilers were removed in vacuum for a total of 15 minutes. When the temperature of the material in the reactor reached 110°C, 1350 grams of pre-measured ethylene oxide was slowly introduced, and the reaction temperature was controlled between 150°C and 160°C. The reaction pressure is between 0MPa and 0.25MPa, and the polymerization time is between 35 minutes and 140 minutes. After the reaction is complete, the pressure in the...

Embodiment 2

[0015] Take by weighing 2.4 grams of magnesium hydroxide, 10 grams of diethylene glycol, dissolve magnesium hydroxide in diethylene glycol in a sonicator, and ultrasonically disperse for 5 minutes to obtain liquid magnesium hydroxide. The catalyst requires fresh preparation in 24 small tests. have to. Put 12.4 grams of liquid magnesium hydroxide and 150 grams of isomeric tridecyl alcohol into a 2L high-pressure reactor. After sealing the reactor, replace the air in the reactor with nitrogen, and heat the reactor to 80°C under the protection of nitrogen. , the catalyst solvent and low boilers were removed in vacuum for a total of 15 minutes. When the temperature of the material in the reactor reached 110°C, 420 grams of pre-measured ethylene oxide was slowly introduced, and the reaction temperature was controlled between 150°C and 160°C. The reaction pressure is between 0MPa and 0.25MPa, and the polymerization time is between 35 minutes and 140 minutes. After the reaction is co...

Embodiment 3

[0017] Weigh 1.5 grams of sodium hydroxide and 5 grams of ethanol, dissolve the sodium hydroxide in the ethanol with stirring, and wait until fully dissolved by stirring. Obtaining the liquid sodium hydroxide catalyst requires fresh preparation within 24 small tests. Put 6.5 grams of liquid sodium hydroxide and 150 grams of isomeric tridecyl alcohol into a 2L high-pressure reactor. After sealing the reactor, replace the air in the reactor with nitrogen, and heat the reactor to 80°C under the protection of nitrogen. , the catalyst solvent and low boilers were removed in vacuum for a total of 15 minutes. When the temperature of the material in the reactor reached 110°C, 270 grams of pre-measured ethylene oxide was slowly introduced, and the reaction temperature was controlled between 150°C and 160°C. The reaction pressure is between 0MPa and 0.25MPa, and the polymerization time is between 35 minutes and 140 minutes. After the reaction is complete, the pressure in the kettle drop...

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Abstract

The invention provides a synthesis method for controlling the narrow distribution of isomeric tridecanol polyoxyethylene ether. The technical solution is characterized in that a basic catalyst is used, and the basic catalyst is dissolved in a dispersant in advance for activation, and the activated liquid basic catalyst is added at 1% to 10% of the weight of the initiator isotridecyl alcohol. The basic catalyst is: barium hydroxide, magnesium hydroxide, sodium hydroxide. The dispersant is: ethanol, propylene glycol, diethylene glycol ether. The isomerized tridecyl alcohol polyoxyethylene ether prepared by the reaction of the present invention has light color, narrow cloud point variation range, narrow molecular weight distribution, excellent performance and is especially suitable for use in the industrial cleaning industry.

Description

technical field [0001] The invention relates to a synthesis method for controlling addition distribution of isomeric tridecanol polyoxyethylene ether, and belongs to the technical field of polymer chemical synthesis. technical background [0002] Isomerized tridecyl alcohol polyoxyethylene ether is a green biodegradable surfactant, which is the best substitute for nonylphenol surfactants in the field of industrial cleaning. In the traditional industrial production process, basic catalysts are usually used to synthesize, and the ring-opening polymerization of ethylene oxide is realized according to the anion addition mechanism. Under the traditional process conditions, the solid basic catalyst is directly added to the initiator. Since the anionic active species of the catalyst cannot be well dispersed, the formation rate of the anionic active species is slow, and the concentration of the active species is not the maximum, resulting in polymerization. In the process, the acti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/28C08G65/30C11D1/72
Inventor 徐莫临李爽张洪凯邱文刚
Owner SHENYANG HAOBO IND CO LTD
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