Method for improving colors of polyether polyol

A polyether polyol and color technology, which is applied in the field of polyether polyol preparation to achieve the effects of high yield, reduced production cost and improved color

Active Publication Date: 2016-08-17
JURONG NINGWU NEW MATERIAL CO LTD BY SHARES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the chromaticity problem existing in polyether polyols, the object of the present invention is to provide a method for improving the color of polyether polyols, which adds decolorizers to the reactor in stages during the production of polyether polyols Inside, the purpose of improving the color of polyether polyols is achieved by using the excellent decolorizing ability of the decolorizing agent, and the decolorizing agent used in this method is easy to remove the components that will not affect the polyether

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A method for improving the color of polyether polyols is obtained by the following method:

[0014] 1) Add 30 grams of ethylenediamine and 6 grams of potassium hydroxide into the reactor with a stirring and condensing device, heat up, feed 240 grams of propylene oxide, and control the temperature at 115~145 o C. The pressure is under 0.4MPa to make it fully react, and the decolorizing agent H 2 o 2 Add 10 grams into the reaction kettle, stir for 1~3 hours, heat up, and control the temperature at 120~165 o C, remove the decolorizer under vacuum for 30 minutes.

[0015] 2) Control the temperature at 115~145 o C. Under the pressure of 0.4MPa, feed 320 grams of ethylene oxide. After fully reacting, the compound decolorizing agent H 2 o 2 Add 18 grams of activated carbon into the reaction kettle, stir for 1-3 hours, heat up, and control the temperature at 120-165 o C, vacuum for 30 minutes, then filter to remove the decolorizer to obtain polyether polyols with improved...

Embodiment 2

[0017] A method for improving the color of polyether polyols is obtained by the following method:

[0018] 1) Add 20 grams of glycerol and 4 grams of potassium hydroxide into the reactor with a stirring and condensing device, heat up, feed 160 grams of propylene oxide, and control the temperature at 115~145 o C. The pressure is under 0.4MPa to make it fully react, and the decolorizing agent H 2 o 2 Add 8 grams into the reaction kettle, stir for 1~3 hours, heat up, and control the temperature at 120~165 o C, remove the decolorizer under vacuum for 30 minutes.

[0019] 2) Control the temperature at 115~145 o C. Under the pressure of 0.4MPa, feed 210 grams of ethylene oxide. After fully reacting, the compound decolorizing agent H 2 o 2 Add 20 grams of activated carbon into the reaction kettle, stir for 1-3 hours, heat up, and control the temperature at 120-165 o C, vacuum for 30 minutes, then filter to remove the decolorizer to obtain polyether polyols with improved color. ...

Embodiment 3

[0021] A method for improving the color of polyether polyols is obtained by the following method:

[0022] 1) Add 30 grams of toluenediamine and 6 grams of potassium hydroxide into the reactor with a stirring and condensing device, heat up, feed 240 grams of propylene oxide, and control the temperature at 115~145 o C. The pressure is under 0.4MPa to make it fully react, and the decolorizing agent H 2 o 2 Add 12 grams into the reaction kettle, stir for 1-3 hours, heat up, and control the temperature at 120-165 o C, remove the decolorizer under vacuum for 30 minutes.

[0023] 2) Control the temperature at 115~145 o C. Under the pressure of 0.4MPa, feed 320 grams of ethylene oxide. After fully reacting, the compound decolorizing agent H 2 o 2 Add 18 grams of white clay into the reaction kettle, stir for 1-3 hours, heat up, and control the temperature at 120-165 o C, vacuum for 30 minutes, then filter to remove the decolorizer to obtain polyether polyols with improved color....

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PUM

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Abstract

The invention discloses a method for improving colors of polyether polyol. The method is implemented by the aid of two-step processes and includes adding decolorizing agents H2O2 into high-pressure reaction kettles after first phases, in other words, reaction between initiators and ethylene oxide in the high-pressure reaction kettles, are completely carried out in polyether polyol preparation procedures, heating the decolorizing agents, vacuumizing the high-pressure reaction kettles for 30 minutes and removing the decolorizing agents; adding compound decolorizing agents into the reaction kettles after the polyether polyol is completely prepared, heating the compound decolorizing agents and filtering and removing the compound decolorizing agents to obtain the color-improved polyether polyol. The method has the advantages that the polyether polyol obtained by the aid of the method is high in yield, the production cost can be reduced, the procedures are easy to implement, the decolorizing agents are easy to remove, impurities can be prevented from being led into the polyether polyol, and the like.

Description

technical field [0001] The invention relates to a preparation method of polyether polyol, in particular to a method for improving the color of polyether polyol by increasing the yield of polyether polyol and reducing production cost. Background technique [0002] Since the existing polyether polyol production process is prepared by polymerizing initiators with ethylene oxide and propylene oxide under high temperature and high pressure, the reaction process is difficult to observe, and the side reaction oligomers are difficult to control, and the reaction temperature is too high. High, too long reaction time will affect the color of the product, which will lead to problems such as low yield, product chromaticity index not meeting the requirements, and high production cost. Contents of the invention [0003] In order to solve the chromaticity problem existing in polyether polyols, the object of the present invention is to provide a method for improving the color of polyether...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/30C08G65/26C08G65/28
CPCC08G65/2606C08G65/2609C08G65/2624C08G65/2627C08G65/30
Inventor 应珏翟洪金李怀阁田永辉陈映欧欧阳春兰潘慧戴钰张荣珍陈瑾
Owner JURONG NINGWU NEW MATERIAL CO LTD BY SHARES
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