Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, 1,1 Katahira, 2-Chome, Aoba-ku, Sendai 980-8577, Japan; Institute of Environmental Engineering of the Polish Academy of Sciences, M. Sklodowska-Curie 34, 41-819 Zabrze, Poland.
J Hazard Mater. 2013 Oct 15;261:163-71. doi: 10.1016/j.jhazmat.2013.07.028. Epub 2013 Jul 22.
In this paper, the bromination reaction between lead oxide and hydrogen bromide originating from the thermal decomposition of tetrabromobisphenol A (TBBPA), under inert and oxidizing atmospheres, was investigated, using a laboratory-scale furnace. The results obtained under inert conditions indicated that bromination of PbO proceeded simultaneously with debromination of TBBPA, with an average effectiveness of 69% (max. 80%). Volatilization of the formed PbBr2 began at 315°C, intensified at 750°C, and reached 98% at 850°C. The formed organic char served as a source of carbon for reduction of the unreacted lead oxide to metallic lead in the range 315-750°C. Additional experiments conducted at selected temperatures under slightly oxidizing (5 vol% O2) and quasi-atmospheric (20 vol% O2) conditions showed no significant effects on bromination-evaporation of lead in the studied mixture. However, in isothermal treatment under quasi-atmospheric oxygen levels, complete vaporization of the formed lead bromide was obtained at a temperature of only 650°C.
本文研究了在惰性和氧化气氛下，由四溴双酚 A（TBBPA）热分解产生的氧化铅与氢溴酸之间的溴化反应，使用实验室规模的炉。在惰性条件下得到的结果表明，PbO 的溴化反应与 TBBPA 的脱溴反应同时进行，平均效率为 69%（最高 80%）。形成的 PbBr2 于 315°C 开始挥发，在 750°C 时加剧，并在 850°C 时达到 98%。形成的有机炭质作为碳源，将未反应的氧化铅还原为金属铅，反应温度范围为 315-750°C。在选定温度下进行的其他实验，在轻微氧化（5 vol% O2）和准大气（20 vol% O2）条件下进行，表明对研究混合物中铅的溴化-蒸发没有显著影响。然而，在准大气氧气水平下的等温处理中，仅在 650°C 即可获得形成的溴化铅的完全蒸发。
