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

摘要

The invention relates to a synergistic mixture of DOLLAR AA 5 to 99 wt .-% of a carboxylic acid having more than 4 carbon atoms, an ether carboxylic acid with C¶8¶-C¶22¶-alkyl, C¶8¶-C¶22¶ Alkenyl or C¶6¶-C¶18¶-alkylaryl substituent, an amidocarboxylic acid, or mixtures thereof, DOLLAR AB from 1 to 95 wt .-% of a Phosphorsäuremono- or diester, or mixtures thereof, which with C¶8¶- Substituted C¶22¶-alkyl, C¶8¶-C¶22¶-alkenyl, C¶6¶-C¶18¶-alkylaryl or alkoxylated groups, DOLLAR A wherein the sum of the components A and B 100 wt. -% results. Further objects of the invention are crude oils containing such mixtures and a process for asphalt dispersion in crude oils.