Oxidation of chloroaromatic compounds (on the example of chlorobenzene) in molten salts
DOI:
https://doi.org/10.7242/2658-705X/2019.2.3Keywords:
deep oxidation, waste destruction, chlorobenzene, molten catalysts, transition metal oxidesAbstract
The article studies the reaction of deep oxidation of chlorobenzene in molten mixtures of hydroxides, carbonates and chlorides of alkali and alkaline earth metals with and without active components V2O5 and Sb2O5 depending on the temperature, catalyst loading and the molar ratio of oxidant gas (air mixture) to chlorobenzene. Thermal decomposition of chlorobenzene proceeds with a low degree of conversion accompanied by the significant coke formation. The research has shown that among the studied catalytic systems molten catalysts based on eutectic mixture of sodium and calcium chlorides with content of 20 wt.% V2O5 demonstrate the highest activity in the deep oxidation of chlorobenzene. The process of coke formation is less observed for the catalytic system NaOH - KOH + 10 wt.% V2O5 (euth.). The chloride ions formed during the oxidation of chloroaromatic compounds under the action of transition metal oxides are oxidized to form molecular chlorine stretching service time of the catalytic systems.
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