Alkali-decomposition of poly(ethylene terephthalate) in mixed media of nonaqueous alcohol and ether. Study on recycling of poly(ethylene terephthalate)

被引：67
|
作者：
Hu, LC
Oku, A
Yamada, E
Tomari, K
机构：
[1] KYOTO INST TECHNOL,CTR ENVIRONM SCI,SAKYO KU,KYOTO 606,JAPAN
[2] KYOTO INST TECHNOL,DEPT CHEM & MAT TECHNOL,SAKYO KU,SAKYO KU,KYOTO 606,JAPAN
来源：
POLYMER JOURNAL | 1997年 / 29卷 / 09期
关键词：
poly(ethylene terephthalate) (PET); plastic recycling; alkali decomposition; mixed solvent system; methanol; ethanol; dioxane; terephthalic acid;
D O I：
10.1295/polymj.29.708
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Alkali-decomposition (depolymerization) of poly(ethylene terephthalate) (PET) was studied in a mixed solvent of an alcohol (ethanol or methanol) and ether (dioxane, tetrahydrofuran, or dimethoxyethane). The time for complete decomposition (>96%) of solid PET with NaOH in methanol al 60 degrees C was 40 min when dioxane (10 vol%) was added as co-solvent in the reaction mixture, whereas 7h without dioxane. Disodium terephthalate, a product, precipitated quantitatively in the media and was separated easily. From the filtrate, ethylene glycol (EG) was recovered by distillation while, for practical use. the major portion of the filtrate was recycled repeatedly as the reaction medium.
引用
收藏
页码：708 / 712
页数：5
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