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Studies On Bromination And Evaporation Of Zinc Oxide During Thermal Treatment With Tbbpa

机译：Tbbpa热处理过程中氧化锌的溴化和蒸发研究

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摘要

Thermodynamic considerations indicate that base metal oxides such as ZnO, PbO, Cu_2O, etc. should easily react with HBr, the main gaseous product from the thermal decomposition of tetrabromobisphenol A (TBBPA), to form low boiling point metallic bromides suitable for volatile separation. In this work a differential scanning calorimeter and laboratory-scale furnace was used to investigate the scope and conditions for the bromination of ZnO by the thermal decomposition of TBBPA. The formed solid, condensed, and gaseous products were analyzed by X-ray diffraction analysis, electron probe microanalysis, inductively coupled plasma analysis, ion chromatography, and gas chromatography coupled with mass spectrometry. The results obtained in this study indicate that the bromination of ZnO occurred at 272 ℃ (DSC) and above 290 ℃ (furnace) with an effectiveness of 41,64, and 81% dependent on the experimental conditions. Volatilization of the formed ZnBr_2 began at 340 ℃ and had a 45% yield at 650 ℃. This yield corresponded to 28-36% of the original zinc content in the mixture under the present experimental conditions.
机译：热力学考虑表明，诸如ZnO，PbO，Cu_2O等贱金属氧化物应易于与HBr反应，后者是四溴双酚A（TBBPA）热分解产生的主要气体产物，形成低沸点的金属溴化物，适合挥发物分离。在这项工作中，使用差示扫描量热仪和实验室规模的熔炉研究了通过TBBPA的热分解来溴化ZnO的范围和条件。通过X射线衍射分析，电子探针微分析，电感耦合等离子体分析，离子色谱和气相色谱与质谱分析法分析形成的固体，冷凝和气态产物。这项研究获得的结果表明，ZnO的溴化发生在272℃（DSC）和290℃（熔炉）以上，其有效率为41,64，取决于实验条件为81％。所形成的ZnBr_2的挥发开始于340℃，在650℃的产率为45％。在当前实验条件下，该产率相当于混合物中原始锌含量的28-36％。

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