回收利用涤纶中试醇解废液再降解聚酯PET

发布时间：2018-01-05 10:41

本文关键词：回收利用涤纶中试醇解废液再降解聚酯PET　出处：《功能材料》2016年02期 　论文类型：期刊论文

【摘要】：利用40L程序化控制乙二醇醇解涤纶面料及乙二醇回收中试装置醇解聚酯,采用减压蒸馏法处理醇解产生的废液,并将处理后的醇解废液与乙二醇按不同比例混合后再醇解涤纶面料,分析不同比例醇解废液用量对转化率、醇解时间的影响;通过羟值酸值测定分析醇解产物的平均分子量;用热重分析法(TG)分析表征醇解产物的热稳定性。结果表明,不同比例醇解废液和乙二醇混合后再醇解涤纶所得产物的主要成分是对苯二甲酸二乙二醇酯(BHET),含有少量的二聚物和三聚物,当醇解废液的比例为30%时,醇解废液的利用率最大,醇解产物BHET单体的含量为48.22%,平均分子量为257.02g/mol,产物产率为75.47%。
[Abstract]:The use of 40L program control device and alcoholysis of ester alcoholysis with ethylene glycol polyester fabric and ethylene glycol recovery, using vacuum distillation waste treatment and alcoholysis produced, processed alcoholysis liquid and ethylene glycol mixture in different proportion after alcoholysis of polyester fabric, analysis of different proportion of alcoholysis liquid dosage on conversion rate, effect of reaction time the determination of acid value; the average molecular weight of alcoholysis products by hydroxyl value; by thermogravimetric analysis (TG) analysis of thermal characterization of alcoholysis products. The results show that the main components of different proportion of alcoholysis liquid and ethylene glycol mixture and polyester product is alcoholysis of diethyl glycol terephthalate (BHET), containing a small amount of poly two and trimer, when alcoholysis liquid ratio is 30%, the maximum rate of alcoholysis liquid, monomer content of alcoholysis products of BHET was 48.22%, the average molecular weight of 257.02g /mol products The rate is 75.47%.

【作者单位】：江南大学生态纺织教育部重点实验室;
【基金】：教育部创新团队资助项目(IRT1135) 丝网专用纳米复合抗静电涤纶单丝制备技术资助项目(BY2013015-42)
【分类号】：X783.4;TQ342.2
【正文快照】： 0引言随着聚酯工业的快速发展,由此产生的废弃涤纶面料日益增多,虽然其本身无毒无害,但大量的废弃涤纶面料难以实现自然降解[1-2],因此涤纶面料的再利用,对实现聚酯的绿色化回收和资源最大化再利用有着重大意义。目前,乙二醇醇解法是聚酯回收工业化最有前景的一种方式,但在此

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