Copolymers of n-alkyl acrylates and maleic anhydride and their use as crystallization inhibitors for paraffin-bearing crude oils

US4663491A · kind A · utility

Assignee

• Chemische Fabrik Stockhausen GmbH · DE

Inventors

• Eduard Barthell · Krefeld, DE
• Anthony Capelle · Borne, NL
• Miroslav Chmelir · Krefeld, DE
• Kurt Dahmen · Rheydt, DE

Key dates

• Filing date: Jun 4, 1985
• Grant date: May 5, 1987
• Expiry date: Jun 4, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F220/18
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to copolymers of esters of acrylic acid or methacrylic acid with unbranched alcohols that contain at least 16 C atoms, and maleic anhydride, and also the use of these copolymers as crystallization inhibitors in paraffin-bearing crude oils.