Corrosion inhibitor/metal passivator additive composition from waste refinery streams
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United States of America Patent
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Jul 8, 2008
Grant Date -
Feb 10, 2005
app pub date -
Jul 25, 2002
filing date -
Jul 25, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The reaction of the disulphided oil, as obtained from the caustic wash of liquefied petroleum gas, with 2,3,8,9,13,14-hexathia-5,6,11,12 -tetraazatricyclo [8.2.1.14,7]tetradeca-4,6,10,12-tetraene was carried out in one pot and one step to yield a corrosion inhibiting composition comprising predominantly of 2,5-bis(methyldithio)-1,3,4-thiadiazole, 2-methylthio-5-ethylthio-1,3,4-thiadiazole and 2,5-bis(ethyldithio)-1,3,4-thiadiazole, for application in fuels, lubes and greases. (I)
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