Production of fatty poly-ester carbonate polyhydric alcohol

A polycarbonate and production process technology, applied in the field of carbon dioxide copolymer production, can solve the problems of poor mixing effect of the system, increased production cost, low product market competitiveness, etc., achieve high phase boundary area and mass transfer speed, no running And sealing parts, the effect of effective and uniform suspension

Active Publication Date: 2007-09-05
JIANGSU ZHONGKE JINLONG CHEM
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  • Application Information

AI Technical Summary

Problems solved by technology

The process is a three-phase reaction of vapor, liquid and solid. Due to the use of a tank reactor, the mixing effect of the system is poor during industrial scale-up, and reaction dead ends are prone to occur, resulting in poor product quality stability.
In addition, due to the high pressure of the carbon dioxide/epoxide copolymerization reaction, during industrial scale-up, as the volume of the reactor increases, the energy consumption of mechanical stirring and investment costs will increase sharply, resulting in an increase in production costs
At the same time, for high-pressure reactions, the utilization rate of the tank reactor is low, and its feeding capacity is generally only 1/2-2/3 of the effective volume of the reactor.
Finally, the production cost of aliphatic polycarbonate polyol is high, and the market competitiveness of the product is low, which affects the large-scale indust

Method used

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  • Production of fatty poly-ester carbonate polyhydric alcohol
  • Production of fatty poly-ester carbonate polyhydric alcohol

Examples

Experimental program
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Effect test

Embodiment 1

[0017] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Taking the loop reactor of a single draft tube as an example, the process of the present invention is further described: the diameter of the outer tube of the loop reactor used is 0.2 meters, the height of the reactor is 2 meters, the diameter of the inner draft tube is 0.14 meters, and the diameter of the draft tube is 0.14 meters. The height is 1.4 meters, and the whole device is shown in Figure 1.

[0018] The reaction adopts solventless polymerization, with 35kg according to the catalyst prepared according to CN 1044663A according to 1.6:4:100, polyether polyol (moisture content 300ppm) that is fully dried, molecular weight is 300, and average functionality is 3, propylene oxide Put it into the loop reactor, feed carbon dioxide to raise the pressure of carbon dioxide in the system to 4Mpa, start the liquid circulation pump to circulate the material in the system, and keep the temperature of the reaction material at 60...

Embodiment 2

[0020] Using the polymerization device described in Example 1, using solvent polymerization, 40 kg of the catalyst prepared according to CN 1044663A according to 1.6:3:30:100, fully dried polyether polyether with a molecular weight of 300 and an average functionality of 3 Alcohol (moisture content 300ppm), toluene, propylene oxide, etc. are added to the loop reactor. Other operations are as in Example 1.

[0021] After 12 hours of reaction, the product was discharged. The molecular weight of the product was 5210, the carbonate group content in the product was 37%, and the by-product propylene carbonate content was 15.2%.

Embodiment 3

[0023] The loop reaction adopts the device shown in Figure 2.

[0024] The reaction adopts solvent-free system polymerization, with 35kg according to the catalyst prepared according to CN 1044663A according to 1.6:5:100, polyether polyol (moisture content 300ppm) that is fully dried, molecular weight is 300, and average functionality is 3, epoxy resin Add propane, etc. into the loop reactor, feed carbon dioxide to increase the pressure of carbon dioxide in the system to 4Mpa, start the liquid circulation pump to circulate the material in the system, and keep the temperature of the reaction material at 60°C by adding jackets and internal heat exchange tubes. Turn on the carbon dioxide compressor, adjust the flow rate of carbon dioxide, keep the concentration of carbon dioxide in the diversion barrel and outside the diversion barrel constant, and discharge the material after 12 hours of reaction. The molecular weight of the product is 3850, the carbonate group content in the mol...

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Abstract

Production of fatty polycarbonate polyol is carried out by taking carbon dioxide/epoxide as raw materials, putting catalyst, epoxide and molecular-weight regulator into cyclic reactor and copolymerization reacting under action of the catalyst in cyclic reactor at 0.1-8MPa and 40-150degree for 0.5-48hrs. The main apparatus consists of cyclic reactor, condenser, vapor/liquid separator, high-pressure carbon dioxide buffer tank, carbon dioxide compressor and liquid cyclic pump, the said cyclic reactor is arranged with single draft tube and multiple draft tubes. It costs low and is efficient.

Description

technical field [0001] The invention relates to a production process of polyols, more specifically to a production process of aliphatic polycarbonate polyols, and belongs to the technical field of carbon dioxide copolymer production. Background technique [0002] Aliphatic polycarbonate polyol is a new type of polyol resin. Its molecular main chain contains aliphatic alkylene and carbonate units, which is quite different from traditional polycarbonate materials. It is different from aliphatic polyester polyol and polyol. Ether polyols are similar, and their properties are between polyester and polyether polyols, such as lower glass transition temperature (glass transition), better room temperature flexibility, etc.; the polyurethane material prepared from this polyol has Many unique properties, such as aliphatic polycarbonate polyurethane elastomers have excellent hydrolysis resistance, low temperature flexibility of polyether polyurethane elastomers and high mechanical stre...

Claims

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Application Information

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IPC IPC(8): C08G64/34
Inventor 刘保华巴伟徐玉俊徐玉华马雄邦李素晓
Owner JIANGSU ZHONGKE JINLONG CHEM
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