Supercritical carbon dioxide assisted extraction from the polycarbonate depolymerization mixture

Margon, V Vid; Agarwal, US Uday; Bailly, Christian; Wit, G. de; Kasteren, J.M.N. van; Lemstra, Piet J.

doi:10.1016/j.supflu.2005.11.007

Cited by 11 publications

(8 citation statements)

References 11 publications

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“…In another report the depolymerization of PC in subcritical and supercritical toluene had been reported [7] . In the meantime, some other publications have been shown PC recycling, alone or blended with other polymers, which have their own merits and drawbacks [8][9][10][11][12][13][14][15][16] .…”

Section: Introductionmentioning

confidence: 99%

Green and inexpensive method to recover Bisphenol-A from polycarbonate wastes

Nikje

Askarzadeh

2013

Polímeros

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Hydroglycolysis of polycarbonate waste from used compact discs was developed to recover Bisphenol-A (BPA) as a valuable material. Experiments were done in glycerin and water as an alternative green solvent. The effect of solvent ratios has been studied to evaluate BPA recovery. The use of 30% aqueous glycerin (pbw) led to 93 and 100% of BPA at reflux condition within 1.0 and 5.5 hours, respectively. Recovered BPAs were identified by spectroscopy methods and the results were compared with commercial sample data.

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Section: Introductionmentioning

confidence: 99%

Green and inexpensive method to recover Bisphenol-A from polycarbonate wastes

Nikje

Askarzadeh

2013

Polímeros

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“…Afterwards, the reaction was performed with conventional heating at 180 °C (oil bath temperature, internal temperature 125–130 °C) following the conditions in Table , entry 3 (Table , entry 4). Products 2 and 3 were detected in 86 % NMR yield and were furthermore separated by column chromatography and isolated in 69 % ( 2 ) and 71 % ( 3 ) yield . Conversely, removal of the excess phenol by vacuum distillation revealed the formation of new poly(bisphenol A carbonate) by the reaction of depolymerization products 2 and 3 observed by 1 H NMR.…”

Section: Methodsmentioning

confidence: 99%

“…Products 2 and 3 were detected in 86 % NMR yield and were furthermore separated by column chromatography and isolated in 69 % (2) and 71 % (3) yield. [27] Conversely, removal of the excess phenol by vacuum distillation revealed the formation of new poly(bisphenol A carbonate) by the reaction of depolymerization products 2 and 3 observed by 1 H NMR.…”

Section: Recycling Of End-of-life Poly(bisphenol a Carbonate) Via Alkmentioning

confidence: 99%

Recycling of End‐of‐Life Poly(bisphenol A carbonate) via Alkali Metal Halide‐Catalyzed Phenolysis

2019

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The chemical recycling of end‐of‐life plastic waste streams can contribute to a resource‐conserving and sustainable society. This matter of recycling is composed of a sequence of depolymerization and subsequent polymerization reactions. In this regard, we have studied the chemical recycling of end‐of‐life poly(bisphenol A carbonate) applying phenol as depolymerization reagent. In the presence of catalytic amounts of alkali metal halides as products bisphenol A and diphenyl carbonate were obtained in excellent turnover frequencies of up to 1392 h −1 and short reaction times. These depolymerization products offer the straightforward possibility to close the cycle by producing new poly(bisphenol A carbonate) and as second product phenol, which can be reused for further depolymerizations.

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“…A mixture of phenol, diphenyl carbonate (PhOCOOPh, DPC) and BPA was obtained after the reaction of PC with phenol . The obtained components were separated using supercritical carbon dioxide by semi‐batch extraction process.…”

Section: Chemical Degradation Of Polycarbonate Waste Materialsmentioning

confidence: 99%

Chemical Degradation of Poly(bisphenol A carbonate) Waste Materials: A Review

2018

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Plastics are indispensable and integral part of our daily life. Each year, we generate tonnes of plastics waste. Poly(bisphenol A carbonate) has created a space for itself in the plastic industry due to its high performance properties. The high rate of production created a major challenge in its management after use or becoming as waste. In this brief review, we have described the chemical degradation of poly(bisphenol A carbonate) and the use of catalyst and reagents. Some of the most utilized chemical degradation methods like alcoholysis, hydrolysis and aminolysis have been explained in detail. The chemical reactions involved in the degradation process have also been discussed.

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Supercritical carbon dioxide assisted extraction from the polycarbonate depolymerization mixture

Cited by 11 publications

References 11 publications

Green and inexpensive method to recover Bisphenol-A from polycarbonate wastes

Green and inexpensive method to recover Bisphenol-A from polycarbonate wastes

Recycling of End‐of‐Life Poly(bisphenol A carbonate) via Alkali Metal Halide‐Catalyzed Phenolysis

Chemical Degradation of Poly(bisphenol A carbonate) Waste Materials: A Review

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