Correlation of acidity of metal ion with catalytic activity for the formation of poly(ethylene terephthalate)

1989 ◽  
Vol 6 (4) ◽  
pp. 354-356
Author(s):  
Jong Shik Chung
Keyword(s):  
Catalytic Activity ◽  
Metal Ion ◽  
Ethylene Terephthalate ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

Mechanistic Insight toward the Roles of Anions and Cations in the Degradation of Poly (ethylene terephthalate) Catalyzed by Ionic Liquids

2021 ◽  
Author(s):  
Zhaoyang Ju ◽  
Lei Zhou ◽  
Xingmei Lu ◽  
Yao Li ◽  
Xiaoqian Yao ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Ionic Liquids ◽  
Ethylene Terephthalate ◽  
High Catalytic Activity ◽  
Mechanistic Insight ◽  
Poly Ethylene Terephthalate ◽  
Anions And Cations ◽  
Poly Ethylene

Ionic liquids (ILs) have shown high catalytic activity in the degradation of poly (ethylene terephthalate) (PET), but the effects of anions and cations as well as the mechanism remain ambiguous....

scholarly journals Depolymerization of Poly(ethylene terephthalate) Wastes through Glycolysis using Lewis Acidic Bentonite Catalysts

2019 ◽  
Vol 32 (1) ◽  
pp. 187-191
Author(s):  
Gopal Jeya ◽  
Murugan Anbarasu ◽  
Ravikumar Dhanalakshmi ◽  
Viswanathan Vinitha ◽  
Vajiravelu Sivamurugan
Keyword(s):  
Metal Ion ◽  
Heterogeneous Catalysts ◽  
Ethylene Terephthalate ◽  
Nitrogen Adsorption ◽  
Impregnation Method ◽  
Wet Impregnation ◽  
Poly Ethylene Terephthalate ◽  
Acidic Nature ◽  
Poly Ethylene ◽  
Optimized Conditions

In the present investigation, the authors explored the depolymerization of waste poly(ethylene terephthalate) (PET) beverage bottles using glycolysis (transesterification) catalyzed by Al3+, Fe3+ and Zn2+ impregnated bentonite catalysts. Heterogeneous catalysts such as clay, zeolite, alumina etc. preferred over homogeneous catalysts, thus we focused on the development of solid acid catalysts based on economically viable clay catalysts. The desired Lewis acidic nature was introduced by wet impregnation method at variable metal ion to clay ratio such as 0.5, 1.0, 2.0, 3.0, 4.0 and 5.0 wt. %. The effect of metal-ion loading on the surface area, pore volume and crystalline nature of the bentonite has been evaluated by nitrogen adsorption and desorption studies and XRD. The PET wastes collected from post-consumer beverage bottles were depolymerized using ethylene glycol as a glycolyting agent afforded bis(2-hydroxy ethyl)terephthalate (BHET) in 85-90 % yield under optimized conditions. The yield of BHET was observed to be increasing with increase in Lewis acidic metal ions loading from 0.5 to 4.0 wt. % as well as increase in catalysts to PET ratio. Among the catalysts, Al3+ and Zn2+-bentonite catalysts showed higher yield of BHET up to 90 % at 4 and 5 wt. % loading of metal-ion.

Electron/gamma radiation-induced synthesis and catalytic activity of gold nanoparticles supported on track-etched poly(ethylene terephthalate) membranes

2018 ◽  
Vol 217 ◽  
pp. 31-39 ◽  
Author(s):  
Ilya V. Korolkov ◽  
Anastassiya A. Mashentseva ◽  
Olgun Güven ◽  
Yevgeniy G. Gorin ◽  
Artem L. Kozlovskiy ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Gamma Radiation ◽  
Ethylene Terephthalate ◽  
Poly Ethylene Terephthalate ◽  
Radiation Induced ◽  
Poly Ethylene

scholarly journals Synthesis, Structure, and Catalytic Activity of Au/Poly(ethylene terephthalate) Composites

2014 ◽  
Vol 125 (6) ◽  
pp. 1263-1267 ◽  
Author(s):  
A. Mashentseva ◽  
D. Borgekov ◽  
M. Zdorovets ◽  
A. Russakova
Keyword(s):  
Catalytic Activity ◽  
Ethylene Terephthalate ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene
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