Rapid Catalytic Recycling of Poly(ethylene terephthalate): Minimal Hydroxide, Minimal Biomass‐Derived Recyclable Cosolvent
Bibliographic record
Abstract
The rapid hydrolysis of poly(ethylene terephthalate) (PET) waste using sodium hydroxide, a phase transfer catalyst and furfuryl alcohol is demonstrated in 10 min at 98.5 °C. The cosolvent is biodegradable, available from biomass‐based sources and outperforms a range of commonly used protic and polar aprotic cosolvents. Such is the competence of the cosolvent for this purpose that waste is minimized—for the first time minimal hydroxide (2.1 eq.) is employed and the solvent volume is limited to just 3 mL g −1 PET (of which only 20% by weight is the organic component). It is found that the medium is compatible with phase transfer catalysis and a promoter incorporating aromatic units is superior (at 1 mol% loading) to previously optimal dimethyldialkylammonium halides. The medium can be recycled and reused after distillation at <100 °C, and furfuryl alcohol is also shown to serve as a cosolvent par excellence for the catalytic hydrolysis of poly( bis ‐phenol A carbonate) waste from compact disks under literature conditions.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".