Continuous production method and device for high-purity alkali metal catalysis of polyether polyol

A technology of metal-catalyzed polyether and polyether polyol, which is applied in the field of continuous production method and device of high-purity alkali metal-catalyzed polyether polyol, can solve the problems of lengthy preparation process and long production cycle, and achieve production process The effect of simplicity, high production efficiency, and simple device structure

Active Publication Date: 2018-07-31
SHANDONG BLUSR DONGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen from this that the traditional alkali metal catalyzed polyether polyol preparation process is relatively tedious, and the production cycle is also long

Method used

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  • Continuous production method and device for high-purity alkali metal catalysis of polyether polyol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Preparation of alkali metal catalyzed polyether polyol crude polymer:

[0041] at 15m 3 230kg of glycerin was added to the stainless steel reaction kettle 1 for nitrogen replacement, and the oxygen content in the reaction kettle 1 was measured to be lower than 100ppm, and 80kg of potassium hydroxide aqueous solution with a mass concentration of 45% was sucked in airtightly, and then the temperature was raised to 90°C for nitrogen blowing. Soak decompression dehydration. Keep the temperature in the kettle at 90°C, continuously add 9970kg propylene oxide and 1800kg ethylene oxide, after the feeding is completed, react with internal pressure for 1 hour to prepare KOH catalyzed polyether polyol crude polymer, and then discharge it into the buffer tank In 2, the temperature of the buffer tank 2 is maintained at 90°C, filled with nitrogen, and maintained at a slightly positive pressure.

[0042] (2) Post-treatment of polyether polyol crude polymer:

[0043] The polyeth...

Embodiment 2

[0046] (1) Preparation of alkali metal catalyzed polyether polyol crude polymer:

[0047] at 15m 3 230kg of glycerin was added to the stainless steel reaction kettle 1 for nitrogen replacement, and the oxygen content in the reaction kettle 1 was measured to be lower than 100ppm, and 80kg of potassium hydroxide aqueous solution with a mass concentration of 45% was sucked in airtightly, and then the temperature was raised to 90°C for nitrogen blowing. Soak decompression dehydration. Keep the temperature in the kettle at 110°C, continuously add 9970kg propylene oxide and 1800kg ethylene oxide, after the addition, react under internal pressure for 1 hour to prepare KOH catalyzed polyether polyol crude polymer, and then discharge it into the buffer tank In step 2, the temperature of the buffer tank 2 was maintained at 130°C, filled with nitrogen, and kept at a slightly positive pressure.

[0048] (2) Post-treatment of polyether polyol crude polymer:

[0049] The polyether polyol...

Embodiment 3

[0052] (1) Preparation of alkali metal catalyzed polyether polyol crude polymer:

[0053] at 15m 3 230kg of glycerin was added to the stainless steel reaction kettle 1 for nitrogen replacement, and the oxygen content in the reaction kettle 1 was measured to be lower than 100ppm, and 80kg of potassium hydroxide aqueous solution with a mass concentration of 45% was sucked in airtightly, and then the temperature was raised to 90°C for nitrogen blowing. Soak decompression dehydration. Keep the temperature in the kettle at 100°C, continuously add 9970kg propylene oxide and 1800kg ethylene oxide, after the feeding is completed, react with internal pressure for 1 hour to prepare KOH catalyzed polyether polyol crude polymer, and then discharge it into the buffer tank In 2, the temperature of the buffer tank 2 is maintained at 100°C, filled with nitrogen, and maintained at a slightly positive pressure.

[0054] (2) Post-treatment of polyether polyol crude polymer:

[0055] The polye...

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Abstract

The invention belongs to the technical field of chemical synthesis and particularly relates to a continuous production method and device for high-purity alkali metal catalysis of polyether polyol. Thedevice comprises a reactor. The reactor is orderly connected to a buffer tank, a neutralization mixer, a preheater, a coalescer, a volatile organic matter removal device, a product detection tank anda finished product tank. The coalescer is orderly connected to a distillation column and a salt storage tank. The outer part of the neutralization mixer is connected to a pipe mixer. The pipe mixer is respectively connected to an acid storage tank and a water storage tank. The continuous production method comprises (1) adding an alkali metal as a catalyst in the reactor, carrying out continuous catalytic synthesis through a polyol compound as a starting agent to obtain a polyol crude polymer and discharging the polyol crude polymer into the buffer tank, and (2) orderly treating the polyol crude polymer through the neutralization mixer, the preheater, the coalescer and the volatile organic matter removal device to obtain high-purity alkali metal catalyzed polyether polyol. The method and device have the advantages of simple processes, low production cost, less equipment investment and high production efficiency.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a continuous production method of high-purity alkali metal-catalyzed polyether polyol and a device thereof. Background technique [0002] Polyether polyol is one of the important raw materials of polyurethane products. Polyurethane products synthesized from polyether polyols include foam plastics, synthetic rubber, coatings, adhesives, chemical fibers, synthetic leather, etc. These products are widely used in national all areas of the economy. The production process of polyether polyols can be divided into three categories according to the different catalysts used in the polymerization system: (1) anion catalyzed synthesis process; (2) amine catalyzed synthesis process; (3) bimetallic catalyzed synthesis process. Among them, the anion catalytic synthesis process mainly uses alkali metals, such as KOH, NaOH, CsOH, etc. as catalysts to prepare polyether poly...

Claims

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Application Information

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IPC IPC(8): C08G65/26C08G65/30
CPCC08G65/2606C08G65/2648C08G65/2696C08G65/30Y02P20/10
Inventor 刘沂倪华方郭辉张涛李晓
Owner SHANDONG BLUSR DONGDA CHEM
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