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Preparation method of polyether polyol with efficient catalytic activity

A technology of polyether polyol and catalytic activity, which is applied in the field of preparation of polyether polyol with high catalytic activity, can solve the problems of high activity and high molecular weight polyether polyol such as long production cycle and low utilization rate of equipment, and achieve the preparation method Scientific and reasonable, short production cycle, high cost performance

Active Publication Date: 2018-06-26
SHANDONG BLUSR DONGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the preparation of high-activity high-molecular-weight polyether polyols has a long production cycle and low equipment utilization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 410g of glycerin and 22g of 45% aqueous potassium hydroxide solution into a 5-liter stainless steel reactor for nitrogen replacement, and measure the oxygen content in the reactor to be lower than 100ppm. Raise the temperature to 70°C, dehydrate at normal pressure for 90 minutes, then vacuumize to -0.097MPa, and carry out dehydration under reduced pressure with nitrogen bubbling. The nitrogen flow rate is 30Nm 3 / h, dehydration under reduced pressure for 110 minutes, and the measured moisture content is less than 0.12wt%. Keep the temperature in the kettle at 85±2°C and the pressure at 0.10±0.05MPa, continuously add 1700g of propylene oxide, and then carry out internal pressure reaction for 30 minutes at a reaction temperature of 80°C. Subsequently, the reactor was evacuated to -0.097MPa, and 248g of 45% potassium hydroxide aqueous solution was sucked in airtightly, and the temperature was raised to 100°C, dehydrated at normal pressure for 150 minutes, and then evac...

Embodiment 2

[0028] 471g of trimethylolpropane and 20g of 50% sodium hydroxide aqueous solution were added into a 5-liter stainless steel reactor for nitrogen replacement, and the oxygen content in the reactor was measured to be lower than 100ppm. Raise the temperature to 103°C, dehydrate at normal pressure for 200 minutes, then vacuumize to -0.095MPa, carry out dehydration under reduced pressure with nitrogen bubbling, and the nitrogen flow rate is 60Nm 3 / h, dehydration under reduced pressure for 240 minutes, and the measured moisture content is less than 0.12wt%. Keep the temperature in the kettle at 105±2°C and the pressure at 0.2±0.1MPa, continuously add 2300g of propylene oxide, and then carry out internal pressure reaction for 60 minutes at a reaction temperature of 110°C. Subsequently, the reactor was evacuated to -0.095MPa, and 340g of 50% sodium hydroxide aqueous solution was sucked in airtightly, and the temperature was raised to 103°C, dehydrated at normal pressure for 240 minu...

Embodiment 3

[0032] 585g of pentaerythritol and 71g of 55% sodium ethoxide aqueous solution were added into a 5-liter stainless steel reactor for nitrogen replacement, and the oxygen content in the reactor was measured to be lower than 100ppm. Raise the temperature to 110°C, dehydrate at normal pressure for 300 minutes, then vacuumize to -0.098MPa, and carry out dehydration under reduced pressure with nitrogen bubbling. The nitrogen flow rate is 90Nm 3 / h, dehydration under reduced pressure for 320 minutes, and the measured moisture content is less than 0.12wt%. Keep the temperature in the kettle at 115±10°C and the pressure at 0.3±0.1, add 2650g of propylene oxide continuously, then carry out internal pressure reaction for 100 minutes, and the reaction temperature is 120°C. Subsequently, the reactor was evacuated to -0.098MPa, and 502g of 55% sodium ethoxide aqueous solution was sucked in airtightly, and the temperature was raised to 110°C, dehydrated at normal pressure for 350 minutes, a...

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Abstract

The invention belongs to the technical field of chemical industry synthesis, and particularly relates to a preparation method of a polyether polyol with efficient catalytic activity. The preparation method comprises: using a polyol compound as a starting agent, adding an alkali metal aqueous solution, carrying out distillation dehydration, adding an epoxy compound, carrying out a polymerization reaction, adding an alkali metal aqueous solution after completing the reaction, and carrying out distillation dehydration again to prepare the polyether polyol. According to the present invention, withthe application of the prepared polymer in the preparation of high-resilience polyether polyol, the characteristics of high reaction activity, short production period and high stability can be achieved; with the application of the prepared polyether polyol with efficient catalytic activity as the base polyether in the preparation of high-activity and high molecular-weight polyether polyol, the use of other catalysts is not required, the reaction activity of the whole polymerization system is significantly improved, and the product has characteristics of strong catalytic activity, fast reaction and low reaction temperature; and the preparation method is scientific, reasonable, simple and easy-performing.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a preparation method of polyether polyol with high-efficiency catalytic activity. Background technique [0002] Highly active and high molecular weight polyether polyols have attracted the attention of the industry for their excellent mechanical properties and processing properties when they are used in the preparation of polyurethane products. However, the traditional method of preparing high-activity and high-molecular-weight polyether polyols is to use polyol compounds as initiators, such as propylene oxide, ethylene oxide, etc., to prepare their oligomers first, and then undergo a longer polymerization cycle, and then refined. As a result, the preparation of high-activity high-molecular-weight polyether polyols has a long production cycle and low equipment utilization. Contents of the invention [0003] In view of the deficiencies in the prior art, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28
CPCC08G65/2609C08G65/2648
Inventor 倪华方刘沂郭辉张奕张涛李晓邵迎秋李宇张莹
Owner SHANDONG BLUSR DONGDA CHEM
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