C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 323/62 (2006.01) C10M 159/22 (2006.01)
Patent
CA 2181137
Dispersant detergent additives for lubricating oils prepared by neutralization, carboxylation, sulfurization-overalkalinization, carbonatation, distillation, filtering and degassing from alkyl phenols containing 35-85 % by weight of liner alkyl substituents. The process does not require during the neutralizing phase the presence of a third solvent, which, by forming an azeotropic mixture with water, promotes the elimination of water arising from the neutralizing reaction. The additives of the invention have improved stability to hydrolysis and improved dispersion properties, improved compatability and improved foaming properties.
La présente invention a pour objet des additifs détergents dispersants pour huiles lubrifiantes. Ils sont préparés par neutralisation, carboxylation, sulfurisation-suralcalinisation, carbonatation, distillation, filtration et dégazage à partir d'alkyl phénols contenant de 35 à 85 % en poids de substituants alkyles linéaires. Ce procédé ne nécessite pas, à la phase neutralisation, la présnce d'un tiers solvant, lequel, en formant un azéotrope avec l'eau, favorise l'élimination de l'eau provenant de la réaction de neutralisation. Les additifs selon l'invention présentent des propriéties améliorées de stabilité à l'hydrolyse, de dispersion, de compatibilité et de moussage.
Cazin Jacques
Le Coent Jean-Louis
Triconnet Thierry
Willis William Woodford Jr.
Chevron Chemical S.a.
Sim & Mcburney
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