| 聚酯废丝的化学回收研究 |
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| 引用本文： | 施立勇,蒋惠亮,马宝利,刘伟.聚酯废丝的化学回收研究[J].应用化工,2009,38(3). |
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| 作者姓名： | 施立勇 蒋惠亮 马宝利 刘伟 |
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| 作者单位： | 江南大学,化学与材料工程学院,江苏,无锡,214122 |
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| 摘 要： | 使用乙二醇(EG)对有色聚酯(PET)废料解聚,经分离提纯,得到对苯二甲酸二乙二醇酯(BHET)。研究了物料比、反应温度、反应时间、催化剂对醇解率的影响。结果表明,在m(乙二醇)∶m(PET)=2∶1,反应温度196℃,反应时间3 h,催化剂用量为PET质量的0.5%条件下,聚酯解聚很彻底,产物羟值可达434 mg/g以上,主要成分是BHET单体及其低聚物。并通过IR,DSC,HPLC验证了产物的组成,BHET单体纯度可达96.457%。
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| 关 键 词： | 废聚酯 乙二醇 回收 解聚 |
Research on chemical recycling of polyester |
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| SHI Li-yong,JIANG Hui-liang,MA Bao-li,LIU Wei.Research on chemical recycling of polyester[J].Applied chemical industry,2009,38(3). |
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| Authors: | SHI Li-yong JIANG Hui-liang MA Bao-li LIU Wei |
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| Abstract: | Scrap of non-ferrous polyester was depolymerized through glycolysis using ethylene glycol.Glycolysis product was separated and purified.The influences of m(EG) /m(PET),temperature,the reaction time and amount of catalyst on conversion rate were investigated.The result showed that m(EG) ∶m(PET)=2 ∶1,196 ℃ the glycolysis time was 3 h and 0.5% catalyst,PET was thoroughly glycolysed and the glycolysis products was obtained with the hydroxyl number values above 434 mg/g.Bis-2-hydroxyethyl terephthalate(BHET)monomer and its oligomers were predominant glycolysis product.The products were characterized by IR spectrum,DSC and HPLC.The content of purified BHET is 96.457%. |
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| Keywords: | polyester scrap ethylene glycol recycle depolymerized |
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