摘要
以乙二醇和路易斯碱为反应介质的醇碱联合分解废聚酯 (PET)技术 ,可实现常压、180℃、30min内快速、彻底解聚PET ,并通过简单工艺即可回收TPA及EG。其分解率≥ 99% ,回收率分别达到 98%和 96 % ,产品质量达到相应的国家标准。研究表明该体系解聚速度和分解率受反应温度、废PET比表面、NaHCO3过量程度等因素的影响。实验得出主要解聚工艺控制参数为 :反应温度 <186℃、废PET片粒≤ 3mm、NaHCO3过量程度≥ 3%、180～ 186℃下反应时间 15～ 6 0min。
The technology of depolymerizing waste PET by uniting the ethandiol and the Luis alkali as reacting medium can make it true quickly and completely depolymerizing waste PET to TPA and EG for recycle at 180℃ and at the normal atmosphere pressure within 40 minutes . The depolymerisation rate exceeds 99% and the recovery rates reach 98% and 96% respectively . The qualities of the TPA and EG live up to the national standard accordingly . The study showes that depolymerizing system is affected by reacting temperature ,the surface area of PET and the excess of Luis alkali.This research provides a new technology of less investment and high efficiency for recycle using waste PET regionally.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
2000年第5期70-73,共4页
Journal of Chongqing University
基金
国家自然科学基金资助项目 ( 2 99770 3 1)
关键词
工艺
废聚酯
醇碱联合分解
waste PET
depolymerisation
technology
