Chlorine-bromine exchange during pyrolysis of 1,2,3,4-tetrabromo-dibenzodioxin with various chlorine donors |
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| Institution: | 1. College of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255091, China.;2. College of Mechanic and Electrical Engineering, Tarim University, Alar 843300, China. |
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| Abstract: | 1,2,3,4-T4BrDD was pyrolyzed with PVC, HCl and NaCl at 900°C. In all reactions bromine was exchanged with chlorine. During the pyrolysis with PVC at T = 900°C, 69 % of the starting material reacted to give BrCl-dioxins (34.3 %) and 1,2,3,4-T4CDD (34.7 %). In the reaction with HCl (T = 900°C), 49.2 % BrCl-dioxins and 1,2,3,4-T4CDD formed. The pyrolysis with NaCl (T = 900°C) yielded 10.5 % BrCl-dioxins and 1,2,3,4-T4CDD. |
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