Modified etherified phenol/aldehyde condensation products and their use for breaking petroleum emulsions

US4465817A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Siegfried Billenstein · Altötting, DE
• Fritz J. Gohlke · Burgkirchen an der Alz, DE
• Martin Hille · Liederbach, DE
• Roland Bohm · Altenberge, DE

Key dates

• Filing date: Jun 23, 1983
• Grant date: Aug 14, 1984
• Expiry date: Jun 23, 2003

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G8/36
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The new petroleum breakers are obtained by subjecting (a) an addition reaction product which has been obtained by reacting aliphatic aldehydes with phenol in a molar ratio of 1:1 to 3:1 at temperatures of 50.degree. to 80.degree. C. in the presence of an alkaline catalyst, to a condensation reaction at 80.degree. to 150.degree. C., after prior neutralization and, if appropriate, in the presence of inert solvents, with (b) a block polymer which has been prepared by reacting polypropylene glycols having molecular weights of 1,300 to 3,000 with 20 to 100% by weight of ethylene oxide in the presence of alkaline catalysts, in a ratio of 0.5 to 4 moles of (a) to 1 mole of (b), and removing the water of the reaction which is formed, and (c) adding on 10 to 400 g of propylene oxide, relative to 100 g of condensation product, or 10 to 200 g of ethylene oxide and propylene oxide in a ratio of 1:0.5 to 14, relative to 100 g of condensation product, in an addition reaction, to the etherified phenol/aldehyde condensation product thus obtained. When used for separating petroleum emulsions, they effect, in particular, a high and rapid removal of salt.