Recovery of constituent monomers from polyethylene terephthalate with supercritical methanol

被引：64

作者：

Sako, T ^{[1
]}

Okajima, I ^{[1
]}

Sugeta, T ^{[1
]}

Otake, K ^{[1
]}

Yoda, S ^{[1
]}

Takebayashi, Y ^{[1
]}

Kamizawa, C ^{[1
]}

机构：

[1] Natl Inst Mat & Chem Res, Tsukuba, Ibaraki 3058565, Japan

来源：

POLYMER JOURNAL | 2000年 / 32卷 / 02期

关键词：

chemical recycling; supercritical methanol; polyethylene terephthalate;

D O I：

10.1295/polymj.32.178

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The effects of temperature, pressure and reaction time on the monomer recovery were investigated to determine the proper conditions for the depolymerization of polyethylene terephthalate (PET) to dimethyl terephthalate (DMT) and ethylene glycol (EG) monomers with supercritical methanol. The PET was decomposed completely at 300 °C and the yields of the DMT and EG monomers increased to about 70% and 16% as the reaction temperature increased to 330 °C. The best pressure at 330 °C was 8.1 MPa, which was the lowest pressure condition. When the reaction time was increased, the yield of each product hardly changed, while the gaseous product increased.

引用

页码：178 / 181

页数：4

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