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A method for preparing polyether polyols by ultrasonically assisted liquefaction of waste water bamboo fibers

A polyether polyol and ultrasound-assisted technology, which is applied in the field of preparing polyether polyol by liquefaction of wild bamboo waste, can solve the problems of less research and achieve the effects of lowering the reaction temperature, increasing the hydroxyl value, and environmental protection of raw materials

Active Publication Date: 2021-03-09
TAIZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is still little research in this area

Method used

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  • A method for preparing polyether polyols by ultrasonically assisted liquefaction of waste water bamboo fibers

Examples

Experimental program
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Effect test

Embodiment 1

[0024] First dry the discarded sheath leaves of Zizania at 50°C overnight, use a pulverizer to pulverize to 40 mesh and sieve to obtain Zizania leaf powder, weigh 1-3g of the powder, put it into polyethylene glycol 400 / glycerol (PEG400: glycerol =4:1) in the mixed liquefaction solvent, the liquid-solid ratio is 8:1, add catalyst (concentrated sulfuric acid), the consumption accounts for 1% of the mixed liquefaction solvent volume, utilize the ultrasonic device that total power is 600W, ultrasonic reaction, reaction time 6min. The ultrasonic conditions are set as shown in Table 1. After the ultrasonic is finished, the temperature is controlled at 100-120°C, and the reaction is stirred at 100r / min for 30min, and the residue rate and hydroxyl value are measured.

Embodiment 2

[0026] First dry the discarded sheath leaves of Zizania zizania at 60°C overnight, pulverize them with a pulverizer, and sieve them through a 80-mesh sieve to obtain Zizania zizania leaf powder. Weigh 1-3g of the powder and put it into polyethylene glycol-400 / glycerol (PEG400: Glycerol=6:1) in the mixed liquefaction solvent, the liquid-solid ratio is 12:1, add catalyst (concentrated sulfuric acid), the dosage accounts for 1% of the volume of the mixed liquefaction solvent, utilize the ultrasonic device with total power of 600W, ultrasonic reaction, reaction The time was 6 minutes, and the ultrasonic conditions were set as shown in Table 1. After the ultrasonic was completed, the temperature was controlled at 100-120°C, and the reaction was stirred at 100 r / min for 30 minutes, and the residue rate and hydroxyl value were measured.

Embodiment 3

[0027] Example 3 Ultrasonic conditions are set as in Table 1, and all the other steps and conditions are the same as in Example 1.

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Abstract

The invention discloses a method for preparing polyether polyols by ultrasonically assisted liquefaction of waste Zizania stem fibers. The method comprises putting Zizania stem leaf powder into a mixed liquefaction solvent of polyethylene glycol 400 and glycerin, and the liquid-solid ratio is 8-8. 12:1, the volume ratio of polyethylene glycol 400 to glycerin is 4-8:1, then add 1-2% catalyst, and use an ultrasonic device to perform ultrasonic reaction for 5-10min. After the ultrasonic is finished, control the temperature at 100- 120°C, stirred for 20‑40min. The method of the invention can greatly reduce the liquefaction time, reduce the consumption of the catalyst and the solid residue rate in the reaction liquid, and increase the hydroxyl value of the reaction liquid.

Description

Technical field: [0001] The invention relates to a method for preparing polyether polyol by liquefaction of fibers, in particular to a method for preparing polyether polyol by liquefaction of water bamboo waste. Background technique: [0002] Polyurethane materials are polymers formed from polyols and isocyanates under the action of catalysts and additives, in which there are multiple urethane bonds (-NH-COO-). Polyurethane foam is one of the fastest-growing synthetic materials in the past 10 years, with an annual growth rate of about 7.0%. Polyether polyol is one of the main raw materials for the synthesis of polyurethane. In recent years, with the increasing shortage of petroleum resources, the price has skyrocketed. In order to reduce the dependence of traditional polyurethane on petroleum and the pollution to the environment after it is discarded. The development of degradable polyurethane materials is urgent. The research on the preparation of vegetable oil polyols h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/34C08G18/48
CPCC08G18/48C08G65/34
Inventor 孙小龙付永前朱华跃罗希张莹莹
Owner TAIZHOU UNIV
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