An article A novel management strategy for removal and degradation of polybrominated diphenyl ethers (PBDEs) in waste printed circuit boards WOS:000494887900021 published article about SUPERCRITICAL METHANOL; REDUCTIVE DEBROMINATION; PRECIOUS METALS; WATER; OIL; TRANSESTERIFICATION; PATHWAYS; KINETICS; RECOVERY; ESTERIFICATION in [Xiu, Fu-Rong; Yu, Xuan; Qi, Yingying; Li, Yifan; Lu, Yongwei; Wang, Yixiao; He, Jiahuan; Zhou, Ke; Song, Zhiqi; Gao, Xiang] Xian Univ Sci & Technol, Coll Geol & Environm, Xian 710054, Shaanxi, Peoples R China; [Xiu, Fu-Rong; Qi, Yingying; Gao, Xiang] Shaanxi Prov Key Lab Geol Support Coal Green Expl, Xian 710054, Shaanxi, Peoples R China in 2019.0, Cited 38.0. Quality Control of Diphenyl oxide. The Name is Diphenyl oxide. Through research, I have a further understanding and discovery of 101-84-8
Waste printed circuit boards (PCBs) contain a high level of brominated flame retardants (BFRs), among which polybrominated biphenyl ethers (PBDEs) are the most widely used additive BFRs. PBDEs are considered to be a type of persistent organic pollutants (POPS). The efficient removal/degradation of PBDEs in waste PCBs is an urgent problem in electronic waste treatment, but the degradation of PBDEs is a great challenge due to their extreme stability and persistence in nature. In this study, a novel management strategy was developed for removal and degradation of PBDEs in waste PCBs by using a simple subcritical methanol (SubCM) process. The results showed that reaction temperature, residence time, solid-to-liquid ratio, and additive NaOH are key factors influencing the removal of PBDEs from waste PCBs. Under optimal conditions (200 degrees C, 60 min, 1:20 g/mL), the removal efficiency of Sigma(8) PBDEs from waste PCBs could reach 91.3% and 98.8% for the proposed process of SubCM and SubCM + NaOH, respectively. When the temperature is below 200 degrees C, highly brominated PBDEs congeners in waste PCBs were degraded into 2,’3,4′,6-Tetrabromodiphenyl ether (BDE71) and 2,4,4′-Tribromodiphenyl ether (BDE28) after SubCM treatment. 4-Bromophenyl ether (BDE4) and diphenyl ether were generated by the further debromination of BDE71 and BDE28 with the increase of treatment temperature. The debromination temperature of PBDEs congeners in SubCM could be markedly lowered by adding 4 g/L of NaOH. The complete debromination of PBDEs congeners in waste PCBs could be achieved at 300 degrees C and 250 degrees C for the developed process of SubCM and SubCM + NaOH, respectively. (C) 2019 Elsevier Ltd. All rights reserved.
Quality Control of Diphenyl oxide. Welcome to talk about 101-84-8, If you have any questions, you can contact Xiu, FR; Yu, X; Qi, YY; Li, YF; Lu, YW; Wang, YX; He, JH; Zhou, K; Song, ZQ; Gao, X or send Email.
Reference:
Ether – Wikipedia,
,Ether | (C2H5)2O – PubChem