Alkoxylated dendrimers and use thereof as biodegradable demulsifiers

US7569615B2 · kind B2 · utility

Assignee

• Clariant Produkte (Deutschland) GmbH · DE

Inventors

• Dirk Leinweber · Kelkheim, DE
• Michael Feustel · Kelkheim, DE
• Elisabeth Wasmund · Altötting, DE
• Heidi Rausch · Burgkirchen an der Alz, DE

Key dates

• Filing date: Jun 19, 2004
• Grant date: Aug 4, 2009
• Expiry date: Feb 24, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10G33/04
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Disclosed is the use of alkoxylated dendrimers for breaking oil/water emulsions. The alkoxylated dendrimers have a molecular weight of from 2400 to 100 000 g/mol and have been alkoxylated with C2-C4-alkylene oxide groups or a mixture of such alkylene oxide groups such that the alkoxylated dendrimer has a degree of alkoxylation of from 1 to 100 alkylene oxide units per free OH group. The alkoxylated dendrimers are added to the oil/water emulsions in amounts of from 0.0001 to 5% by weight, based on the oil content of the emulsion to be demulsified.