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Method for preparing polyatomic alcohol for polyurethane foam

A technology of rigid foam polyurethane and polyol, applied in the field of polyol for preparing rigid foam polyurethane

Active Publication Date: 2013-08-21
廊坊华宇创新科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it didn't work because waste oil, which goes to the food industry, is about half as profitable as making biodiesel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Embodiment 1: the preparation of polyol for rigid polyurethane foam

[0075]Add 236kg of sucrose, 4kg of ethylenediamine, and 102kg of diethylene glycol in the reactor, vacuumize and stir, replace nitrogen three times, add 2.3kg of catalyst dimethylamine, 7.5kg of propylene oxide, continue to stir and heat up, and the temperature rises to Add 112kg of propylene oxide at 80-100°C, and then control the temperature to carry out polymerization at 80-100°C. After about 1.5 hours, when the pressure returns to negative pressure, carry out vacuum dehydration, and take samples to analyze the moisture. When the moisture is less than 0.10 %, pump in 202kg of waste oil and 3.4kg of catalyst dimethylamine treated in step 1, then keep the temperature between 90 and 110°C and add the remaining 328.5kg of propylene oxide, and control the temperature at 100 to 120°C to continue Carry out the polymerization reaction, the pressure of the whole feeding and reaction process is below 0.3MPa,...

Embodiment 2

[0076] Embodiment 2: the preparation of polyol for rigid polyurethane foam

[0077] Add 206kg of sucrose and 92kg of ethylene glycol into the reaction kettle, vacuumize and stir, replace nitrogen three times, add 6.1kg of catalyst dimethylamine, 5.9kg of propylene oxide, continue to stir and heat up, and start when the temperature rises to 80-100°C Add 147.5kg of propylene oxide, and then control the temperature to carry out polymerization reaction at 80-100°C. After about 1.5 hours, when the pressure returns to negative pressure, carry out vacuum dehydration, and take samples to analyze the moisture. When the moisture is less than 0.10%, pump it into 98kg of waste oil treated in step 1 and 9.6kg of catalyst dimethylamine, then keep the temperature between 90-110°C and add the remaining 436.6kg of propylene oxide, and control the temperature at 100-120°C to continue the polymerization reaction. The pressure in the feeding and reaction process is below 0.3MPa. When the pressure...

Embodiment 3

[0078] Embodiment 3: the preparation of polyol for rigid polyurethane foam

[0079] Add 211kg of sucrose, 4kg of ethylenediamine, and 132kg of diethylenediamine to the reaction kettle, vacuumize and stir, replace nitrogen three times, add 2.2kg of catalyst dimethylamine, 9kg of propylene oxide, continue stirring and heat up, and the temperature rises to 80 Start to add 113kg of propylene oxide at ~100°C, then control the temperature to carry out polymerization reaction at 80~100°C, after about 1.5 hours, when the pressure returns to negative pressure, carry out vacuum dehydration, and take samples to analyze the moisture, when the moisture is less than 0.10% 194kg of waste oil and 3.2kg of catalyst dimethylamine were pumped in, and then the remaining 332kg of propylene oxide was added while the temperature was kept between 90 and 110°C. The pressure of the process is controlled below 0.3MPa. When the pressure is reduced to negative pressure again, the obtained crude product is...

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Abstract

The invention discloses a method for preparing polyatomic alcohol for polyurethane foam by using drainage oil or waste animal oil or plant oil or a mixture of waste animal oil and plant oil. The method comprises the following steps of: 1, treating drainage oil; 2, selecting the conventional initiator with the conventional design method for petroleum-based polyatomic alcohol, replacing 10-50 percent of the adding amount of propylene oxide or epoxy ethane in the conventional formula with the drainage oil treated in the step 1, and determining a drainage oil polyhydric alcohol formula with a method for reducing the using amount of the conventional initiator by 4-15 percent; and 3, performing oxyalkylation on a material. The method has a simple process, the problem of replacement of a petroleum resource with a renewable resource is solved, the environment can be protected, and sustainable development can be realized; and the problem that drainage oil is applied in the food industry is solved, and the health benefit of the public can be prevented from being damaged in a certain degree.

Description

technical field [0001] The invention relates to the field of preparation of foamed plastics, in particular to a method for preparing polyol for rigid foam polyurethane. Background technique [0002] Rigid polyurethane foam, referred to as rigid polyurethane foam, is currently the best insulation material except for vacuum insulation. In aerospace engineering, it is used for heat insulation of liquid hydrogen and liquid oxygen rocket propellant storage tanks. The boiling points of these two low-temperature liquids are as low as -253°C and -183°C respectively, and the latent heat of evaporation is very low. A small amount of heat leakage can cause violent Evaporation has extremely strict requirements on heat insulation; in civilian use, it is widely used as heat insulation for refrigerators and freezers. As the best performance insulation material, it also has a strong advantage in building energy saving. At present, the annual demand for polyols for rigid polyurethane foam i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/28C08G18/48C11B3/00C11B3/02C11B3/10C11B13/00C08G101/00
CPCY02W30/74
Inventor 高春青
Owner 廊坊华宇创新科技有限公司