Synergistic mixtures of phosphoric esters with carboxylic acids or carboxylic acid derivatives as asphaltene dispersants

US6204420A · kind A · utility

Assignee

• Clariant Corporation · DE

Inventors

• Dennis Miller · Kelkheim, DE
• Axel Boris Vollmer · Kriftel, DE
• Michael Feustel · Kelkheim, DE
• Peter Klug · Großostheim, DE

Key dates

• Filing date: Jun 24, 1999
• Grant date: Mar 20, 2001
• Expiry date: Jun 24, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S507/929
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a synergistic mixture of PA1 A from 5 to 99% by weight of a carboxylic acid having more than 4 carbon atoms, an ethercarboxylic acid containing C.sub.18 -C.sub.22 -alkyl, C.sub.18 -C.sub.22 -alkenyl or C.sub.6 -C.sub.18 -alkylaryl substituents, an amidocarboxylic acid, or mixtures thereof, PA1 B from 1 to 95% by weight of a phosphoric mono- or diester, or mixtures thereof, which is substituted by C.sub.18 -C.sub.22 -alkyl, C.sub.18 -C.sub.22 -alkenyl, C.sub.6 -C.sub.18 -alkylaryl or alkoxylated groups, where the sum of components A and B is 100% by weight, to crude oils containing such mixtures, and to a process for dispersing asphaltenes in crude oils.