Chemical recycling of poly(ethylene) by catalytic degradation into aromatic hydrocarbons using H-Ga-silicate

1998 ◽  
pp. 1975-1976 ◽  
Author(s):  
Yoshio Uemichi ◽  
Kazuhiko Takuma ◽  
Akimi Ayame
Keyword(s):  
Aromatic Hydrocarbons ◽  
Catalytic Degradation ◽  
Chemical Recycling ◽  
Poly Ethylene

scholarly journals Organocatalyzed closed-loop chemical recycling of thermo-compressed films of poly(ethylene furanoate)

2021 ◽  
Author(s):  
Elena Gabirondo ◽  
Beatriz Melendez-Rodriguez ◽  
Carmen Arnal ◽  
Jose M. Lagaron ◽  
Antxon Martínez de Ilarduya ◽  
...  
Keyword(s):  
Closed Loop ◽  
Chemical Recycling ◽  
Thermally Stable ◽  
Poly Ethylene

Poly(ethylene furanoate) (PEF) films were first produced using thermo-compression. Thereafter, the chemical recyclability was demonstrated in the presence of a thermally stable organocatalyst followed by its repolymerization.

Low-temperature catalytic degradation of chlorinated aromatic hydrocarbons over bimetallic Ce-Zr/UiO-66 catalysts

2021 ◽  
Vol 414 ◽  
pp. 128782
Author(s):  
Yun Fan ◽  
Haijun Zhang ◽  
Meihui Ren ◽  
Yichi Zhang ◽  
Yun Li ◽  
...  
Keyword(s):  
Low Temperature ◽  
Aromatic Hydrocarbons ◽  
Catalytic Degradation

Synthesis and sizing performances of water-soluble polyester based on bis(2-hydroxyethyl) terephthalate derived from depolymerized waste poly(ethylene terephthalate) fabrics

2018 ◽  
Vol 89 (4) ◽  
pp. 572-579 ◽  
Author(s):  
Jing Lu ◽  
Mengjuan Li ◽  
Yanyan Li ◽  
Xiaoqiang Li ◽  
Qiang Gao ◽  
...  
Keyword(s):  
Surface Tension ◽  
Fourier Transform ◽  
Ethylene Terephthalate ◽  
Water Soluble ◽  
Chemical Recycling ◽  
Step Method ◽  
Pet Fabric ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene ◽  
Viscosity Stability

This work aimed at effective chemical recycling of waste poly(ethylene terephthalate) (PET) fabrics into water-soluble polyester (WSP). For this, PET fabric waste was depolymerized using excess ethylene glycol (EG) in the presence of zinc acetate as catalyst. The glycolysis product of PET, bis(2-hydroxyethyl) terephthalate (BHET) was then used to synthesize WSP by a three-step method, that is, transesterification, esterification and polycondensation. The structures of BHET and WSP were identified by Fourier transform infrared spectra. Sizing performances of WSP were studied, and it was found that the surface tension of WSP size (57 mN/m, 22℃, 0.5% of weight) was lower than common sizes, the viscosity of WSP size was 1–2 mPa·S (95℃, 6% of weight) and the viscosity stability was larger than 90% at this temperature. The mixture of WSP and starch showed stronger adhesion to polyester–cotton roving and polyester roving than onefold starch. K/ S values of fibers before sizing and after desizing showed a slightly difference, which indicated that WSP would not influence the color of yarns when used as the sizing agent.

New trends in chemical recycling of poly(ethylene terephthalate)

1998 ◽  
Vol 135 (1) ◽  
pp. 137-145 ◽  
Author(s):  
Tadeusz Spychaj ◽  
Daniel Paszun
Keyword(s):  
Ethylene Terephthalate ◽  
Chemical Recycling ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene
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