RESUMO
A practical and efficient disposal method for hydrodechlorination of polychlorinated biphenyls (PCBs) in transformer oil is reported. Transformer oil containing PCBs was treated by nanometric sodium hydride (nano-NaH) and transition metal catalysts. High destruction and removal efficiency (89.8%) can be attained by nano-NaH alone under mild conditions. The process exhibits apparent characteristics of a first order reaction. The reductive ability of nano-NaH was enhanced by the addition of transition metal catalysts. In the presence of TiCl4, 99.9% PCBs was hydrodechlorinated. The complex reducing reagents, Ni(OAc)2+i-PrONa, show extra hydrodechlorinating activity for di-chlorinated biphenyls.
Assuntos
Cloro/química , Óleos/química , Bifenilos Policlorados/química , Compostos de Sódio/química , Gerenciamento de Resíduos/métodos , Catálise , Cobalto , Eletricidade , Óleos Industriais , Resíduos Industriais , Microquímica , Níquel , Oxirredução , TitânioRESUMO
Salicylaldehyde (selectivity = 57.3% at a conversion = 73.8%) was prepared for the first time by the oxidation of o-cresol in a single step using impregnated CuCo/C catalysts.
