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Novel polyester-polyether polyatomic alcohol and preparation method thereof

A technology of polyether polyols and polyesters, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve problems such as inappropriate manufacturing of food packaging materials, reduced performance of recycled plastics, and limited number of recycling repetitions. Achieve significant economic and social benefits, reduce raw material costs, and increase product added value

Inactive Publication Date: 2012-11-14
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Physical recycling technology saves investment and has low processing costs. However, the performance of various recycled plastics is much lower than that of new materials, and contains a lot of impurities. Generally, they can only be downgraded and used. They are not suitable for manufacturing food packaging materials, and the number of recycling repetitions is limited. Need to find other ways to deal with

Method used

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  • Novel polyester-polyether polyatomic alcohol and preparation method thereof
  • Novel polyester-polyether polyatomic alcohol and preparation method thereof
  • Novel polyester-polyether polyatomic alcohol and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Refining of crude glycerin

[0039] Add 10g of methanol to 100g of crude glycerin, then neutralize with hydrochloric acid to pH 6, centrifuge, the lower layer is used to prepare soap, the upper layer is distilled under reduced pressure, the obtained methanol is recycled, and the temperature rises to 105-110°C. Distilled under reduced pressure for 1h to obtain refined glycerin.

[0040] The crude glycerol is a by-product crude glycerin phase separated during biodiesel transesterification; the raw material used for biodiesel transesterification is catering waste oil;

[0041] (2) Synthesis of polyester-polyether polyol

[0042] The recovered PET is crushed, air-dried, and the moisture is reduced to below 0.5% by mass, and sand, stones, and metal solids are sieved to obtain recovered PET fragments; 100 g of recovered PET fragments, 50 g of refined glycerin, and Diol 20g, tetrabutyl titanate 0.02g, turn on the stirrer, heat to 210°C, and react for 2h; add 20g of succi...

Embodiment 2

[0045] (1) Refining of crude glycerin

[0046] Add 100g of crude glycerin, add 15g of acetone, then neutralize with sulfuric acid to pH 7, centrifuge, the lower layer is used to prepare soap, the upper layer is distilled under reduced pressure, the acetone obtained is recycled, the temperature rises to 105-110 °C, and the Pressure distillation 1h, in refined glycerin.

[0047] Described crude glycerin, with embodiment 1;

[0048] (2) Synthesis of polyester-polyether polyol

[0049]The recovered PET is crushed, air-dried, and the moisture is reduced to below 0.5% by mass, and sand, stones, and metal solids are sieved to obtain recovered PET fragments; 100 g of recovered PET fragments, 80 g of refined glycerin, 1 , 40g of 2-propanediol, 0.07g of zinc acetate, turn on the agitator, heat to 220°C, and react for 2h; add 32g of glutaric anhydride to the reaction kettle, react at 210°C for 8h until anhydrous distills out, vacuumize, and the vacuum Keep it at -0.09MPa, control the ...

Embodiment 3

[0052] (1) Refining of crude glycerin

[0053] Add 12g of ethyl acetate to 100g of crude glycerin, then neutralize with hydrochloric acid to pH 6.5, centrifuge, the lower layer is used to prepare soap, the upper layer is distilled under reduced pressure, the obtained ethyl acetate is recycled, and the temperature rises to 105 -110°C, distilled under reduced pressure for 1 hour to obtain refined glycerin.

[0054] Described crude glycerin, with embodiment 1;

[0055] (2) Synthesis of polyester-polyether polyol

[0056] The recovered PET is crushed, air-dried, and the moisture is reduced to below 0.5% by mass, and the sand, stones, and metal solids are sieved to obtain recovered PET fragments; 100 g of recovered PET fragments, 65 g of refined glycerin, and two Glycol 30g, stannous octoate 0.06g, turn on the agitator, heat to 225°C, react for 2h; add maleic anhydride 26g to the reaction kettle, react at 220°C for 7h until anhydrous distills out, vacuumize, vacuum The temperatu...

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Abstract

The invention relates to polyester-polyether polyatomic alcohol and a preparation method of the polyester-polyether polyatomic alcohol, belonging to the technical field of organic polymer, comprehensive utilization of resources and environmental-friendly novel processes. The method comprises the step of recovering polyethylene glycol terephthalate and biodiesel by-product crude glycerine as the main raw materials to prepare the novel polyester-polyether polyatomic alcohol through the reactions of catalysis alcoholysis, esterification and etherification. With the adoption of the method, new ways and fields for recovering polyethylene glycol terephthalate and recycling use of the crude glycerine are provided, and the cost on raw materials of the polyester-polyether polyatomic alcohol is reduced, and thus the added value of products is increased.

Description

technical field [0001] The invention relates to a polyester-polyether polyol and a preparation method thereof, in particular to a polyol prepared by recycling polyethylene terephthalate (PET) and crude glycerin, a by-product of biodiesel production, as raw materials. The ester-polyether polyol and the preparation method thereof belong to the technical fields of organic macromolecule, resource comprehensive utilization and environment-friendly new technology. Background technique [0002] Polyester or polyether polyols have been widely used in the preparation of polyurethane foams and adhesives. Petrochemical raw materials are generally used for their preparation. Due to the non-renewability of petroleum resources, it is of great significance to use renewable resources to prepare polyols. [0003] Polyethylene terephthalate (PET) is a commonly used packaging material for food, medical equipment, electrical parts, etc. With the continuous increase of social demand, the product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/672C08G63/78C07C31/22C07C29/80C07C29/74
Inventor 王志玲苏玲郑鲁沂杨小凤
Owner UNIV OF JINAN
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