Corrosion inhibitor/metal passivator additive composition from waste refinery streams

US7396802B2 · kind B2 · utility

Assignee

• Indian Oil Corporation Limited · IN

Inventors

• Pankaj Kumar Mondal · Faridabad, IN
• Khem Chand Dohhen · Faridabad, IN
• Rakesh Sarin · Faridabad, IN
• Deepak Kumar Tuli · Faridabad, IN
• Ram Prakash Verma · Mumbai, IN
• Akhilesh Kumar Bhatnagar · Faridabad, IN

Key dates

• Filing date: Jul 25, 2002
• Grant date: Jul 8, 2008
• Expiry date: Jan 4, 2024

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10L10/04
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

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)