Additive composition for cold operability of middle distillates

US5725610A · kind A · utility

Assignees

• Elf Antar France · FR
• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Despina Vassilakis · Val-de-Reuil, FR
• Robert Leger · Racine, US
• Nathalie Cerqueda · Poitiers, FR
• Wolfgang Ritter · Düsseldorf, DE
• Thomas A. Reichert · Los Altos, US
• Stephan von Tapavicza · Erkrath, DE

Key dates

• Filing date: Aug 13, 1996
• Grant date: Mar 10, 1998
• Expiry date: Aug 13, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10L1/224
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Additive composition enhancing the low temperature operability of average distillates beyond -20.degree. C. comprising at least 40% by weight of a composition consisting of: i) from 60 to 94% by weight of an antisedimentation additive resulting from the reaction of at least one aliphatic dicarboxylic compound and one polyamine of general formula (II) wherein R is a saturated aliphatic radical comprising from 1 to 32 carbon atoms, n is 2-4 and m is 1-4; and ii) 6-40 % by weight of a dispersing-stabilizing additive having a molecular weight varying from 15000 to 50000 resulting from the esterification reaction of a linear alcohol having from 6 to 24 atoms with an organic acid such as maleic acid and its halides, the ester obtained being polymerized with itself or a copolymerizing compound selected from aliphatic dicarboxylic compounds.