Extraction of Polychlorinated Biphenyls (PCBs) and Dibenzyl Disulfide from Transformer Oils using Polar Aprotic Solvents andReductive Dehalogenation of Extracted PCBs

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Extraction of Polychlorinated Biphenyls (PCBs) and Dibenzyl Disulfide from Transformer Oils using Polar Aprotic Solvents andReductive Dehalogenation of Extracted PCBs

Popis výsledku v původním jazyce

Extractions of PCBs from mineral oils with polar aprotic solvents (PAS) acrylonitrile AC, dimethyl sulfoxide DMSO, dimethyl formamide DMF, N-methyl pyrrolidone NMP and propylene carbonate PC were performed in order to compare the extraction efficiencies.In a single-stage extraction performed at room temperature, the efficiencies ranged from the highest to the lowest as follows: NMP DMF DMSO PC AC. NMP exhibited the highest efficiency, around 70%. . Pyridine N-oxide was also used as a catalyst for interfacial mass transfer in an attempt to increase the efficiency of the extraction. NMP was evaluated as having the best chance to be used in industry. Vacuum distillation and reductive dechlorination catalyzed by microparticles of bimetallic catalyst (Pd/Fe, 0.3%wt Pd on grey cast iron) were the two methods used to isolate the extracted PCBs from the solvent. When borohydride was added to the reaction mixture (< 0.1M), the reaction rates were almost one order of magnitude higher. The influ

Název v anglickém jazyce

Extraction of Polychlorinated Biphenyls (PCBs) and Dibenzyl Disulfide from Transformer Oils using Polar Aprotic Solvents andReductive Dehalogenation of Extracted PCBs

Popis výsledku anglicky

Extractions of PCBs from mineral oils with polar aprotic solvents (PAS) acrylonitrile AC, dimethyl sulfoxide DMSO, dimethyl formamide DMF, N-methyl pyrrolidone NMP and propylene carbonate PC were performed in order to compare the extraction efficiencies.In a single-stage extraction performed at room temperature, the efficiencies ranged from the highest to the lowest as follows: NMP DMF DMSO PC AC. NMP exhibited the highest efficiency, around 70%. . Pyridine N-oxide was also used as a catalyst for interfacial mass transfer in an attempt to increase the efficiency of the extraction. NMP was evaluated as having the best chance to be used in industry. Vacuum distillation and reductive dechlorination catalyzed by microparticles of bimetallic catalyst (Pd/Fe, 0.3%wt Pd on grey cast iron) were the two methods used to isolate the extracted PCBs from the solvent. When borohydride was added to the reaction mixture (< 0.1M), the reaction rates were almost one order of magnitude higher. The influ

Druh

D - Stať ve sborníku

CEP obor

CI - Průmyslová chemie a chemické inženýrství

OECD FORD obor

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Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of the International Conference Protection and Restoration of the Environment XII

ISBN

978-960-88490-5-1

ISSN

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e-ISSN

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Počet stran výsledku

1

Strana od-do

604-609

Název nakladatele

Grafima Publ

Místo vydání

Thessaloniki

Místo konání akce

Skiathos island

Datum konání akce

29. 6. 2014

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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