2013
DOI: 10.1590/s0104-14282013005000019
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Green and inexpensive method to recover Bisphenol-A from polycarbonate wastes

Abstract: 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. Show more

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Cited by 27 publications
(10 citation statements)
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“…The peak at 1542cm −1 corresponds to the C=C bond of aromatic rings of the BPA molecular structure. Peaks between 2852 and 2919cm −1 were attributed to the C-H functional group present in the polypropylene structure, similar to the results reported by Nikje et al 20 The incorporation of BPA into PLA caused the disappearance of the 1045 and 1160cm −1 peaks, referring to the C-C and C-O bonds. With respect to PP, the incorporation of BPA caused the disappearance of the peaks 996, 1375, and 1460cm −1 , which correspond to the C-C, CH 3 , and CH 2 bonds, respectively.…”
Section: Determination Of Bpasupporting
confidence: 87%
“…The peak at 1542cm −1 corresponds to the C=C bond of aromatic rings of the BPA molecular structure. Peaks between 2852 and 2919cm −1 were attributed to the C-H functional group present in the polypropylene structure, similar to the results reported by Nikje et al 20 The incorporation of BPA into PLA caused the disappearance of the 1045 and 1160cm −1 peaks, referring to the C-C and C-O bonds. With respect to PP, the incorporation of BPA caused the disappearance of the peaks 996, 1375, and 1460cm −1 , which correspond to the C-C, CH 3 , and CH 2 bonds, respectively.…”
Section: Determination Of Bpasupporting
confidence: 87%
“…For PC support membrane, peaks at 1770 cm −1 and 1220 cm −1 were assigned to C = O and C‐O bonds, respectively. [ 29 ] Another peak observed at 1504 cm −1 appears due to C = C stretching in aromatic ring carbon. For the TFC membrane spectra, the broadband in the 3200 to 3600 cm −1 region is attributed to the asymmetric vibration of hydroxyl (–OH) groups introduced by PVA coating.…”
Section: Resultsmentioning
confidence: 99%
“…Moreover, the signals of C=O and C─O bonds in PC membrane appeared at 1768 cm −1 and 1200 cm −1 , respectively. [ 34 ] For the PC‐PU blend membrane, the signals about 1730 cm −1 and 3350 cm −1 can be assigned to C═O bonds and also hydroxyl species (OH) in the structure of PU, respectively. [ 35, 36 ] According to Figure 1 and for the PC‐PU/Al 2 O 3 nanocomposite membrane, all peaks for PC membrane are observable while the signals near 3350 cm −1 as well as 3500 cm −1 can be assigned to the OH group in the PU structure and the Al‐OH bond due to presence of the Al 2 O 3 nanoparticle, respectively.…”
Section: Resultsmentioning
confidence: 99%