Process for preparing a corrosion inhibitor/metal passivator additive for lubricant, grease and fuel applications from waste refinery streams

US6362137B1 · kind B1 · utility

Assignee

• Indian Oil Corporation Limited · IN

Inventors

• Akhilesh Kumar Bhatnagar · Faridabad, IN
• Deepak Kumar Tuli · Faridabad, IN
• Rakesh Sarin · Faridabad, IN
• Ajay Kumar Arora · Faridabad, IN
• Pankaj Kumar Mandal · Mumbai, IN

Key dates

• Filing date: Aug 17, 2000
• Grant date: Mar 26, 2002
• Expiry date: Aug 17, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2040/046
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

This invention relates to a cost effective process for preparing a corrosion inhibitor/metal passivator additive for lubricant, grease and fuel applications from waste refinery streams, comprising reacting 2,5-dimercapto-1,3,4-thiadiazole either in powder form or in solution form in polar organic solvent, with disulphide oil obtained from Merox extraction/caustic wash of the refinery streams, in the presence or absence of redox agent.