Method for preparing glyceryl polyether glycol

A technology of glyceryl polyether and polyol, which is applied in the field of preparation of polyether polyol for polyurethane foam, can solve the problems of difficulty in direct utilization and poor sales, and achieves the effects of cheap raw materials, good product performance, and difficult handling.

Inactive Publication Date: 2009-03-25
JURONG NINGWU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the expansion of biodiesel production scale, more and more by-product glycerol is obtained. Since this type of glyc

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0023] Example 1

[0024] 33% of refined glycerol, 67% of sorbitol are used as co-initiators, and the catalyst is dimethylamine (40% aqueous solution), which is 3% of the total amount of co-initiators. Begin to add propylene oxide. The amount of propylene oxide added is 2.8 times the total weight of the co-starter. Due to the exothermic reaction, the temperature should not exceed 135°C, and the pressure should be controlled below 0.5MPa. After the addition of propylene oxide, the reaction temperature was maintained for 2 hours to make the reaction fully proceed, then degassed for 20 minutes, and filtered to obtain glycerol-sorbitol polyoxypropylene ether with an average molecular weight of 500.

Example Embodiment

[0025] Example 2

[0026] Refined glycerol 5%, sucrose 60%, propylene glycol 25%, toluene diamine 10% are used as co-initiator, trimethylamine (40% aqueous solution) is used as catalyst, and the amount of catalyst is 5% of the total amount of co-initiator. In the reactor, the temperature is raised, and propylene oxide is added when the temperature reaches 100°C. The amount of propylene oxide added is 3 times the total weight of the co-starter. Due to the exothermic reaction, the temperature should not exceed 155°C, and the pressure should be controlled below 0.5MPa. . After the addition of propylene oxide, the reaction temperature was maintained for 1.5 hours to make the reaction proceed fully, then degassed for 3 hours, and filtered to obtain glycerol-sucrose polyoxypropylene ether with an average molecular weight of 600.

Example Embodiment

[0027] Example 3

[0028] Refined glycerol was used as the initiator, potassium hydroxide was used as the catalyst, and the amount of the catalyst was 0.2% of the total amount of the co-initiator, and was added to the reactor, and the temperature was increased. When the temperature reached 100 ° C, propylene oxide was added, and the addition amount of propylene oxide was 2 times the total weight of the initiator, due to the exothermic reaction, the temperature should not exceed 135°C, and the pressure should be controlled below 0.5MPa. After the addition of propylene oxide, the reaction temperature is maintained for 2 hours to make the reaction fully proceed, and then it is purified and filtered to obtain glycerol polyoxypropylene ether with an average molecular weight of 200.

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PUM

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Abstract

The invention discloses a method for preparing glycerol-based polyether polyol. Firstly, crude glycerol, a by-product of biodiesel, is refined to obtain refined glycerol which is used as an initiator together with other low-molecular-weight polyol and amines or used as the initiator alone; and with the existence of an alkaline catalyzer, the refined glycerol is reacted with oxidized alkene to obtain the polyether polyol. In the invention, the crude glycerol, the by-product of the biodiesel, is used as the raw material for producing the polyether polyol, thus having low cost, good product properties and being capable of meeting the requirements of producing polyurethane materials.

Description

technical field [0001] The invention relates to a method for preparing polyether polyol for polyurethane foam, in particular to a method for preparing glycerin-based polyether polyol by using crude glycerol, a by-product of biodiesel preparation. Background technique [0002] With the increasingly serious global energy shortage and environmental deterioration, controlling the exhaust emissions of fuel vehicles and protecting the natural environment has become an urgent problem for human beings to solve. Biodiesel is an oxygen-containing clean fuel. As a substitute for high-quality diesel oil, it is an environmentally friendly green fuel with far-reaching economic and social benefits. Therefore, it has attracted more and more attention from all countries in the world, and its output has also increased sharply. [0003] The most widely used biodiesel production method today is the alcoholysis of vegetable oils, and the main by-product produced in the alcoholysis process is gly...

Claims

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Application Information

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IPC IPC(8): C08G65/28C08G18/48
Inventor 应军翟洪金应珏
Owner JURONG NINGWU CHEM
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