Method for degrading and recovering polyester polyurethane

A technology of polyester polyurethane and recycling methods, applied in plastic recycling, recycling technology, chemical instruments and methods, etc., can solve the problems of harsh reaction conditions, large environmental pollution, high degradation cost, etc., and achieve moderate reaction temperature and simple solvent Easy to obtain, short reaction time effect
CN110105620AInactive Publication Date: 2019-08-09SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
Publication Date
2019-08-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the field of recycling of organic polymer materials, and especially relates to a method for degrading and recovering polyester polyurethane. The waste polyester polyurethane is degraded in an alcohol solution by using urea as a catalyst, and obtained degradation products are separated and purified to obtain a small molecule alcohol and an amine. The method avoids pollutionof burying and burning to soil, water and air, avoids the defect that only chemicals with low added values can be obtained by physical crushing, and also avoids the harms of toxic gases generated byheat treatment. A degradation system used in the method is especially green, environmentally friendly, economical and saving.
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Description

technical field

[0001] The invention belongs to the field of recycling organic polymer materials, and in particular relates to a method for degrading and recycling polyester polyurethane. Background technique

[0002] As the sixth largest synthetic material, polyurethane is widely used in automobiles, refrigerator manufacturing, transportation, civil engineering, shoes, synthetic leather, fabrics, aviation, medical treatment, petrochemical and other fields. From 2008 to 2014, the global annual output of polyurethane was from From 16.3 million tons to 21 million tons, the global annual output of polyurethane will reach 28.6 million tons in 2018, resulting in a large amount of solid waste pollution. Therefore, there are many researches on the degradation and recycling methods of polyurethane. The recycling methods of polyurethane generally include burial, incineration, physical crushing, heat treatment and chemical treatment: burying will cause soil and water pollution; incine...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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