摘要
研究了乙二醇解聚废旧聚酯工艺,探索并明确了催化剂含量、废旧聚酯与乙二醇质量比、温度、时间等参数对非均相解聚效率的影响。试验结果表明:催化剂质量分数0.2%、废旧聚酯与乙二醇质量比1:3、常压反应温度196℃、反应时间2h为优化高效的醇解工艺,醇解率为100%,对苯二甲酸双羟乙酯(BHET)产率达到80%。研究了醇解主要产物中BHET与低聚物的分离纯化工艺,通过DSC/TGA、FTIR、NMR等测试手段对分离组分进行了分析表征。
The depolymerization technology of waste polyester(PET)by using ethylene glycol was studied,effects of weight ratio of PET to ethylene glycol,depolymerizing temperature,depolymerizing time and other parameters on non-homogeneous depolymerization rate were investigated.With a catalyst content as 0.2%,PET-to-EG ratio as 1:3,reaction temperature as 196℃,reaction time as 2 h under normal pressure,an optical technology with a 100% depolymerization rate and 80% yield of bis(2-hydroxyethyl)terephthalate(BHET)was obtained.By separation and purification of glycolysis products to obtain oligomer and BHET,these two main components were characterised by methods of DSC/TGA,FTIR and NMR.
作者
胡园超
张宙
石教学
曹宇恒
邓倩倩
张须臻
HU Yuan-chao;ZHANG Zhou;SHI Jiao-xue;CAO Yu-heng;DENG Qian-Qian;ZHANG Xu-zhen(College of Materials and Textiles, Zhejiang Sci-Tech University, Hangzhou 310018, Zhejiang, China;Zhejiang Grerial Co. Ltd., Shaoxing 312071, Zhejiang, China)
出处
《合成纤维》
CAS
2018年第10期1-5,共5页
Synthetic Fiber in China
基金
国家重点研发计划(2016YFB0302900)
绍兴市院校科技合作专项(项目号2017708)
关键词
废旧聚酯
化学法解聚
乙二醇
低聚物
对苯二甲酸双羟乙酯
waste polyester
chemical depolymerization
ethylene glycol
oligomer
dihydroxyethyl terephthalate
