Decomposition Behavior of Flame Retardant Plastics Containing Brominated Flame Retardant and Trioxide Antimony

概要

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The behavior of bromine, antimony and carbon during thermal decomposition process with nitrogen and steam was investigated for fundamental study toward chemical recycling of flame retardant plastics containing brominated flame retardant and trioxide antimony, in nitrogen or steam atmosphere at 573-973 K. Under the current experimental conditions, flammable gases such as methane and ethane were present in pyrolysis gas, and about 60% of bromine and 90% of antimony were transferred to the liquid phase and existed mainly as SbBr<SUB>3</SUB>. However, another portion of bromine in the liquid product was in the form of organic bromide such as 1-bromo ethyl benzene. When the temperature of the system was set at 973 K in a 40% steam atmosphere, debromination of the organic bromide compound was increased in comparison with the decomposition in a nitrogen atmosphere and about 80% of the organic bromide compounds were converted to inorganic compounds of bromine.