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Preparation method of bisphenol A polyether polyol

A technology of polyether polyol and bisphenol, which is applied in the field of preparation of bisphenol A polyether polyol, can solve the problems of homogeneous stirring and mixing of catalysts, large stirring resistance of bisphenol A, and large stirring resistance of agitator, and achieve product quality Good stability, short production cycle and high production efficiency

Pending Publication Date: 2022-01-28
SHANDONG BLUSR DONGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the industry, bisphenol A is used as the initiator, and when using a tank reactor to prepare low-molecular-weight polyether polyols, on the one hand, because the initiator bisphenol A has a high proportion in the entire polymerization system, when the polymerization When the reaction temperature is lower than 158°C, the starter bisphenol A is in a solid powder state and is difficult to melt. At this time, the agitator of the reaction kettle has a large stirring resistance and is difficult to start and rotate, which will easily cause the agitator motor to be damaged due to overload. ; On the other hand, due to the high stirring resistance of bisphenol A, it is difficult to stir and mix with the catalyst evenly, which leads to difficulties in initiating the entire polymerization system, or cannot be initiated normally, resulting in the failure of the polymerization reaction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] at 5m 3 In the stainless steel reaction kettle, add 2kg 90% solid potassium hydroxide and 105.7kg bisphenol A respectively, then add 4.4kg 90% solid potassium hydroxide and 211.4kg bisphenol A respectively, then add 15.6kg 90% Solid potassium hydroxide and 739.9kg of bisphenol A were added to the reactor. Nitrogen replacement, measuring the oxygen content in the reactor is less than 100ppm. The reaction kettle was evacuated to -0.1MPa, and the temperature was gradually raised to 62±2°C, and 211.4kg of propylene oxide was added for dissolution pre-reaction, and the reaction time was 1 hour. Keep the temperature in the kettle at 107±2°C and the pressure at 0.10±0.05MPa, continuously add 711.6kg of propylene oxide, then carry out the internal pressure reaction for 1 hour, the reaction temperature is 107±2°C, then remove the incompletely reacted propylene oxide Vacuum removal, and refining the above polymer, can obtain the bisphenol A polyether polyol.

[0026] The analy...

Embodiment 2

[0029] at 5m 3 In the stainless steel reaction kettle, add 0.88kg 90% solid potassium hydroxide and 87.8kg bisphenol A respectively, then add 1.33kg 90% solid potassium hydroxide and 131.7kg bisphenol A respectively, then add 2.23kg 90% Solid potassium hydroxide and 219.5kg bisphenol A are added in the reactor. Nitrogen replacement, measuring the oxygen content in the reactor is less than 100ppm. The reactor was evacuated to -0.1MPa, and the temperature was gradually raised to 98±2°C, and 131.7kg of propylene oxide was added for dissolution pre-reaction, and the reaction time was 6 hours. Keep the temperature in the kettle at 158±2°C and the pressure at 0.10±0.05MPa, continuously add 1425.3kg of propylene oxide, then carry out internal pressure reaction for 1 hour, the reaction temperature is 158±2°C, and then the incompletely reacted propylene oxide Vacuum removal, and refining the above polymer, can obtain the bisphenol A polyether polyol.

[0030] The analysis indicators...

Embodiment 3

[0033] at 5m 3 In the stainless steel reaction kettle, add 1.33kg 90% solid potassium hydroxide and 109.1kg bisphenol A respectively, then add 2.22kg 90% solid potassium hydroxide and 181.9kg bisphenol A respectively, then add 5.34kg 90% Solid potassium hydroxide and 436.6kg of bisphenol A were added to the reactor. Nitrogen replacement, measuring the oxygen content in the reactor is less than 100ppm. The reaction kettle was evacuated to -0.1MPa, and the temperature was gradually raised to 80±2°C, and 72.8kg of propylene oxide was added for dissolution pre-reaction, and the reaction time was 3 hours. Keep the temperature in the kettle at 110±2°C and the pressure at 0.10±0.05MPa, continuously add 1191.6kg of propylene oxide, then carry out internal pressure reaction for 1 hour, the reaction temperature is 110±2°C, then remove the incompletely reacted propylene oxide Vacuum removal, and refining the above polymer, can obtain the bisphenol A polyether polyol.

[0034] The anal...

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Abstract

The invention belongs to the technical field of chemical synthesis, and particularly relates to a preparation method of bisphenol A polyether polyol. The preparation method of the bisphenol A polyether polyol comprises the following steps: by adopting bisphenol A as an initiator and solid potassium hydroxide as a catalyst, firstly adding part of epoxypropane to carry out dissolving pre-reaction, then carrying out polymerization reaction with epoxypropane, and after the reaction is finished, refining the obtained polymer to obtain the bisphenol A polyether polyol. When the method provided by the invention is used for industrial production of bisphenol A polyether polyol, the method has the characteristics of high product quality stability, high production efficiency, short production period and no damage to production equipment. By adopting the preparation method provided by the invention, the universal bisphenol A polyether polyol which is regular in molecular structure, narrow in molecular weight distribution, stable in product quality and high in cost performance can be prepared. The preparation method is scientific, reasonable, simple and easy to implement.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a preparation method of bisphenol A polyether polyol. Background technique [0002] The bisphenol A polyether polyol prepared by using bisphenol A as the initiator, because the initiator is composed of aromatic compounds, makes the polyether macromolecular chain contain rigid chain groups, thus endowing downstream products with better mechanical properties and thermal stability. Bisphenol A polyether polyol is mainly used in the preparation of polyurethane hard foam sponge and filling foam material, and has been widely used in the fields of mine caulking materials and reinforcement materials. [0003] Bisphenol A is a white solid particle at normal temperature and pressure, with a density of about 1.195g / cm 3 , the melting point is about 158-159 ° C, it is difficult to melt at low temperature. In the industry, bisphenol A is used as the initiator, and wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/26C08G65/30
CPCC08G65/2612C08G65/30
Inventor 张涛战晓彤段燕芳高铭樊兆辉穆潇潇贾世谦
Owner SHANDONG BLUSR DONGDA CHEM
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