Ammonium salts of polymaleic acids and use as corrosion inhibitors in water-in-oil emulsions

US4436639A · kind A · utility

Assignee

• BASF SE

Inventors

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

Key dates

• Filing date: May 10, 1982
• Grant date: Mar 13, 1984
• Expiry date: May 10, 2002

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 salts of polymaleic acids having a molecular weight between 200 and 1500 and to their use in preventing the corrosion of metal caused by hydrogen sulfide and carbon dioxide in water-in-oil emulsions such as crude oil.