Quaternary ammonium salts and their use as drag reducing agents

US4705860A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Dieter Ohlendorf · Liederbach, DE
• Heinz Hoffmann
• Werner Interthal · Gerolzhofen, DE
• Ulrich Pintschovius · Hattersheim, DE

Key dates

• Filing date: Mar 11, 1986
• Grant date: Nov 10, 1987
• Expiry date: Mar 11, 2006

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/34
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Quaternary ammonium salts of the formula EQU R.sub.1 --K.sup..sym. A.sup..crclbar. in which PA1 R.sub.1 denotes C.sub.12 -C.sub.26 -alkyl or C.sub.12 -C.sub.26 -alkenyl, PA1 K.sup..sym. denotes a group of the formula ##STR1## or --.sup..sym. N(R.sub.2).sub.3, R.sub.2 denotes C.sub.1 -C.sub.3 -alkyl, preferably methyl, and A.sup..crclbar. denotes an anion of one of the following formulae: R.sub.3 SO.sub.3.sup..crclbar., in which R.sub.3 is C.sub.6 -C.sub.9 -alkyl or alkenyl and the sum of C atoms in R.sub.1 and R.sub.3 should be at least 21; ##STR2## in which Hal is fluorine, chlorine, bromine or iodine, R.sub.4 is C.sub.1 -C.sub.5 -alkyl, C.sub.2 -C.sub.5 -alkenyl or C.sub.1 -C.sub.5 -alkoxy in positions 3, 4, 5 or 6, R.sub.5 is hydrogen or hydroxyl in positions 2 or 3, R.sub.6 is COO.sup.- or SO.sub.3.sup.- and R.sub.7 is hydrogen or methyl, with the exception of the salicylate and m-halogenobenzoate ions when combined with C.sub.16 -alkylpyridinium and C.sub.16 -alkyltrimethylammonium. These salts are suitable as drag reducing agents in aqueous media with turbulent flow.