溶剂萃取-亲核反应脱除塑料热解油中有机氯OA北大核心CSTPCD

Solvent extraction-nucleophilic dechlorination was investigated.The effects of reaction solvent type,nucleophilic reagent type and amount,mass ratio of reaction solvent to oil,and other components of the oil on dechlorination by nucleophilic reaction were examined,the rapid-control steps of solvent extraction-nucleophilic dechlorination were analyzed,and the reaction products of different chlorinated compounds were identified.The experimental results show that triethylene glycol,diethylene glycol,ethylene glycol and glycerol can effectively extract organochlorine and have high solubility for nucleophilic reagents,which can promote the contact and reaction between organochlorine and nucleophilic reagents,and reaction solvents with low viscosity are more conducive to nucleophilic dechlorination,among which ethylene glycol has the best overall performance.Extraction of organochlorine is a quick-control step of solvent extraction-nucleophilic dechlorination.Among the nucleophilic reagents studied,NaHS has the best nucleophilic properties.Among the nucleophilic reagents studied,NaHS has the strongest nucleophilicity,and the dechlorination rate of real plastic pyrolysis oil reaches 95.8%when the reaction temperature is 150℃,n(NaHS)∶n(Cl)=4,and m(ethylene glycol)∶m(oil)=1.The reactivity of primary chlorinated hydrocarbon and secondary chlorinated hydrocarbon is significantly higher than that of chlorinated aromatic hydrocarbon.