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Decontamination of Oils Contaminated with Polychlorinated Biphenyls and Dibenzyl Disulfide Using Polar Aprotic Solvents

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    SYSNO ASEP0445923
    Document TypeJ - Journal Article
    R&D Document TypeJournal Article
    Subsidiary JOstatní články
    TitleDecontamination of Oils Contaminated with Polychlorinated Biphenyls and Dibenzyl Disulfide Using Polar Aprotic Solvents
    Author(s) Kaštánek, František (UCHP-M) RID, SAI, ORCID
    Matějková, Martina (UCHP-M) RID, ORCID, SAI
    Spáčilová, Lucie (UCHP-M) RID, SAI
    Maléterová, Ywetta (UCHP-M) RID, ORCID, SAI
    Kaštánek, P. (CZ)
    Šolcová, Olga (UCHP-M) RID, ORCID, SAI
    Source TitleInternational Journal of Engineering Science and Innovative Technology. ON -LINE - ISSN 2319-5967
    Roč. 4, č. 2 (2015), s. 41-48
    Number of pages8 s.
    Publication formOnline - E
    Languageeng - English
    CountryIN - India
    Keywordscorrosive sulfur ; dibenzyl disulfide ; polar aprotic solvents
    Subject RIVCI - Industrial Chemistry, Chemical Engineering
    R&D ProjectsTA04020151 GA TA ČR - Technology Agency of the Czech Republic (TA ČR)
    Institutional supportUCHP-M - RVO:67985858
    AnnotationThe highest efficiency, around 70 % in single-step extraction exhibited NMP. NMP was evaluated as having the best chance to be used in industry. It was shown that for some transformer oils the separation of corrosive sulfur with the common technique of filtration through a layer of commercially available sorbent (for example Fuller’s earth) is totally inadequate. However, extraction efficiency of DBDS from contaminated transformer oil with the help of NMP is sufficiently high over 99 % and feasible in a fair time of about 20 minutes. The remaining concentration of DBDS after single-step extraction from transformer oil containing up to100 ppm DBDS was low enough (approx. 0.1 ppm or non-detectable). Detection of corrosive sulfur in transformer oil after extraction with NMP has been also performed by Siemens test method (IEC 62535) and by updated ASTM 1275B proposed by CIGRE Covered Conductor Deposition test method and was negative. It is possible to consider the transformer oil after the extraction procedure as corrosive sulfur free. Traces of solvent in the oil after extraction were quantitatively separated from treated oil by purification via simple liquid-solid extraction with commercial Si-Al-Mg based inorganic sorbent containing attapulgite.
    WorkplaceInstitute of Chemical Process Fundamentals
    ContactEva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227
    Year of Publishing2016
    Electronic addresshttp://www.ijesit.com/Volume%204/Issue%202/IJESIT201502_06.pdf
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