"Part one of this dissertation deals with the development and validation of a test method for determination of total corrosive sulfur in mineral insulating oils other technical oils. The method involved reaction of corrosive sulfur compounds in oils with finely divided copper at temperatures ≥ 110 °C. The reaction yielded cuprous sulfide (Cu₂S), Cu₂S was then oxidized to cupric sulfate (CuSO₄), which was determined as sulfate with ion chromatography. The method offers a quantitative assessment of corrosive sulfur compounds in oils and eliminates ambiguities associated with the international standard methods for corrosive sulfur in mineral insulating oils and other technical oils that rely on an empirical approach that centers around "eye-balling" test specimens and comparing color on metal strip against a standard color chart. These methods have been shown to yield false positive as well as false negative results.
Part two of this dissertation involved development evaluation and chemical characterization of a highly effective broad spectrum microbial disinfectant derived from controlled oxidation of natural oils. During this research, reaction conditions were optimized to achieve the highest output of antimicrobial compounds. Gas Chromatography - Mass Spectrometry was used to monitor the reactor output. Vapor permeability and trapping of disinfectant in different media at ambient and sub ambient temperatures were also evaluated. In exposure experiment both chemical data and microbial data were obtained under varied conditions to determine overall disinfection efficiency with a variety of vegetative bacteria, bacterial spores, fungal spores and viral species. Experiments showed that under optimal conditions disinfections efficiencies in excess of 9 log cfu was achieved with all bacterial species tested during the study"--Abstract, page iii.
Nam, Paul Ki-souk
Seemamahannop, Rachadaporn, 1959-
Westenberg, David J.
Ph. D. in Chemistry
Missouri University of Science and Technology
xvi, 160 pages
© 2012 Kyle Rodney Anderson, All rights reserved.
Dissertation - Restricted Access
Mineral oils -- Testing
Corrosion and anti-corrosives
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Electronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library.http://merlin.lib.umsystem.edu/record=b10719212~S5
Anderson, Kyle Rodney, "Part I: Quantitative determination of total corrosive sulfur in mineral insulating oils and technical liquids; Part II: Development and validation of a broad spectrum microbial disinfectant" (2012). Doctoral Dissertations. 2369.
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