Inhibitors against corrosion caused by CO.sub.2 and H.sub.2 S in water-in-oil emulsions

US4517114A · kind A · utility

Assignee

• BASF SE

Inventors

• Knut Oppenlaender · Ludwigshafen, DE
• Karl Stork · Eisenberg (Pfalz), DE
• Klaus Barthold · Mannheim, DE

Key dates

• Filing date: Aug 26, 1983
• Grant date: May 14, 1985
• Expiry date: Aug 26, 2003

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S507/939
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The subject invention relates to compositions which inhibit the corrosion caused by CO.sub.2 and H.sub.2 S in the transport and storage of crude oils, which are generally water-in-oil, in particular salt-water-in-oil emulsions. The corrosion inhibitors are mixtures of certain imidazoline or tetrahydropyrimidine derivatives, precursors thereof, or their complexes with sulfur and certain maleinamidic acids.