Synthesis of dianols or BPA through catalytic hydrolyisis/glycolysis of waste polycarbonates using a microwave heating

Rosi, Luca; Bartoli, Mattia; Undri, Andrea; Frediani, Marco; Frediani, Piero

doi:10.1016/j.molcata.2015.07.027

Cited by 33 publications

(26 citation statements)

References 36 publications

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“…[827][828][829] Alkaline earth metal oxides and hydroxides, alkali hydroxides and carbonates, and rare earth triflates all catalyze PBPAC hydrolysis, enabling milder reaction conditions and higher BPA yields especially when an organic cosolvent such as 1,4-dioxane is used. [830][831][832][833][834][835][836] Similar to hydrolysis of PET, ionic liquid catalysts [837][838][839] and microwave heating [840][841] also facilitate this reaction.…”

Section: Chemical Recycling Of Polycarbonates and Other Polyester Fee...mentioning

confidence: 99%

“…To our knowledge, PBPAC alcoholysis was first reported with methanol, NaOH catalyst, and toluene cosolvent to swell the polymer and obtain BPA and methylene carbonate as products. 842 The reaction has since been adapted to continuous flow, 843 accelerated using microwave heating, 841 and run under supercritical conditions. [844][845][846] Alkali halide, heterogeneous, ionic liquid, and organic base catalysts have also been employed to increase yield and selectivity for BPA under milder conditions.…”

Section: Chemical Recycling Of Polycarbonates and Other Polyester Fee...mentioning

confidence: 99%

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Expanding Plastics Recycling Technologies: Chemical Aspects, Technology Status and Challenges

Aguirre-Villegas

Allen

et al. 2022

Preprint

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Less than 10% of the plastics generated globally are recycled, while the rest are incinerated, accumulated in landfills, or leach into the environment. New technologies are emerging to chemically recycle waste plastics that are receiving tremendous interest from academia and industry. Chemists and chemical engineers need to understand the fundamentals of these technologies to design improved systems for chemical recycling and upcycling of waste plastics. In this paper, we review the entire life cycle of plastics and options for the management of plastic waste to address barriers to industrial chemical recycling and further provide perceptions on possible opportunities with such materials. Knowledge and insights to enhance plastic recycling beyond its current scale are provided. Outstanding research problems and where researchers in the field should focus their efforts in the future are also discussed.

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Section: Chemical Recycling Of Polycarbonates and Other Polyester Fee...mentioning

confidence: 99%

Section: Chemical Recycling Of Polycarbonates and Other Polyester Fee...mentioning

confidence: 99%

Expanding Plastics Recycling Technologies: Chemical Aspects, Technology Status and Challenges

Aguirre-Villegas

Allen

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…[808][809][810] Alkaline earth metal oxides and hydroxides, alkali hydroxides and carbonates, and rare earth triflates all catalyze PBPAC hydrolysis, enabling milder reaction conditions and higher BPA yields especially when an organic cosolvent such as 1,4-dioxane is used. [811][812][813][814][815][816][817] Similar to hydrolysis of PET, ionic liquid catalysts [818][819][820] and microwave heating [821][822] also facilitate this reaction. To our knowledge, PBPAC alcoholysis was first reported with methanol, NaOH catalyst, and toluene cosolvent to swell the polymer and obtain BPA and methylene carbonate as products.…”

Section: Chemical Recycling Of Polycarbonates and Other Polyester Fee...mentioning

confidence: 99%

Expanding Plastics Recycling Technologies: Chemical Aspects, Technology Status and Challenges

Aguirre-Villegas

Allen

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…The microwave-assisted reverse polymerization (hydrolysis) of polycarbonate (PC) in the presence of NaOH using tetrahydrofuran/water as solvent has been also reported [27] obtaining bisphenol-A, the main monomer employed for the synthesis of PC.…”

Section: Polyestersmentioning

confidence: 99%

Mixed or Contaminated Waste Plastic Recycling through Microwave - Assisted Pyrolysis

Frediani¹,

Frediani²

2022

Recent Perspectives in Pyrolysis Research

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A single type of thermoplastic polymer is easily recycled through a mechanical process, but this way can’t be followed in the presence of mixed or contaminated plastic. In this case, one of the main followed solutions is a thermochemical process and among them, microwave-assisted pyrolysis is one of the emerging technologies. This chapter offers an update of the microwave-assisted pyrolysis of mixed or contaminated waste plastic as a very promising example of chemical recycling. Furthermore, some unpublished results in this field will be reported such as the pyrolysis of waste lead containing polyethylene coming from end cycle batteries or the pyrolysis of waste polypropylene from facemasks used for covid protection. Finally, some examples of pilot plants will be described and commented as well as several industrial cooperations.

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Synthesis of dianols or BPA through catalytic hydrolyisis/glycolysis of waste polycarbonates using a microwave heating

Cited by 33 publications

References 36 publications

Expanding Plastics Recycling Technologies: Chemical Aspects, Technology Status and Challenges

Expanding Plastics Recycling Technologies: Chemical Aspects, Technology Status and Challenges

Expanding Plastics Recycling Technologies: Chemical Aspects, Technology Status and Challenges

Mixed or Contaminated Waste Plastic Recycling through Microwave - Assisted Pyrolysis

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