首页> 美国卫生研究院文献>Molecules >Chemical and Electrochemical Recycling of End-Use Poly(ethylene terephthalate) (PET) Plastics in Batch Microwave and Electrochemical Reactors
【2h】

Chemical and Electrochemical Recycling of End-Use Poly(ethylene terephthalate) (PET) Plastics in Batch Microwave and Electrochemical Reactors

机译:分批微波和电化学反应器中最终使用的聚对苯二甲酸乙二酯(PET)塑料的化学和电化学回收

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

This work describes new methods for the chemical recycling of end-use poly(ethylene terephthalate) (PET) in batch, microwave and electrochemical reactors. The reactions are based on basic hydrolysis of the ester moieties in the polymer framework and occur under mild reaction conditions with low-cost reagents. We report end-use PET depolymerization in refluxing methanol with added NaOH with 75% yield of terephthalic acid in batch after 12 h, while yields up to 65% can be observed after only 40 min under microwave irradiation at 85 °C. Using basic conditions produced in the electrochemical reduction of protic solvents, electrolytic experiments have been shown to produce 17% terephthalic acid after 1 h of electrolysis at −2.2 V vs. Ag/AgCl in 50% water/methanol mixtures with NaCl as a supporting electrolyte. The latter method avoids the use of caustic solutions containing high-concentration NaOH at the outset, thus proving the concept for a novel, environmentally benign method for the electrochemical recycling of end-use PET based on low-cost solvents (water and methanol) and reagents (NaCl and electricity).
机译:这项工作描述了在批处理,微波和电化学反应器中对最终使用的聚对苯二甲酸乙二醇酯(PET)进行化学回收的新方法。该反应基于聚合物骨架中酯部分的碱性水解,并在温和的反应条件下用低成本试剂进行。我们报告了最终的PET在回流的甲醇中的最终解聚反应,其中加入的NaOH在12 h后分批分批加入了NaOH,对苯二甲酸的产率为75%,而在85°C的微波辐射下仅40分钟后,产率最高可达65%。使用质子溶剂电化学还原过程中产生的基本条件,电解实验表明,在-2.2 V下电解1小时后,相对于Ag / AgCl在50%水/甲醇混合物中,以NaCl作为支持电解质,电解后生成17%对苯二甲酸。后一种方法避免了一开始就使用含有高浓度NaOH的苛性碱溶液,因此证明了一种新颖,环保的方法的概念,该方法基于低成本溶剂(水和甲醇)对最终用PET进行电化学回收,试剂(氯化钠和电)。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号