Cationic ethylene oxide/propylene oxide and ethylene oxide/butylene oxide polymers, a process for their preparation and their use

US4451671A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Helmut Diery · Kelkheim, DE
• Norbert Wester · Hofheim, DE
• Martin Hille · Liederbach, DE

Key dates

• Filing date: Aug 30, 1982
• Grant date: May 29, 1984
• Expiry date: Aug 30, 2002

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S516/07
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Thus, the invention relates to compounds of the formula I ##STR1## where R is aromatic, preferably phenylene, R.sub.1 and R.sub.2 denote C.sub.1 -C.sub.4 -alkyl, preferably C.sub.1 -C.sub.2 -alkyl, R.sub.3 denotes methyl or ethyl, x and z together denote a number from 2 to 360, preferably from 2 to 140, y denotes a number from 15 to 70, preferably 25 to 60, n denotes a number from 1 to 10 and A.sup.- denotes an anion, preferably chloride or bromide, a process for their preparation and their use as demulsifiers for demulsifying crude oil emulsions and as corrosion inhibitors in equipment for lifting and processing natural gas and crude oil.