Overbased metal-containing detergents

C - Chemistry – Metallurgy – 10 – M

Patent

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Details

C10M 159/20 (2006.01) C07G 99/00 (2009.01) C10M 159/22 (2006.01) C10M 159/24 (2006.01)

Patent

CA 2256540

A method of manufacturing a calcium overbased detergent, of TBN at least 300, from at least two surfactants, at least one of which is a phenol surfactant or a salicylic acid surfactant. Overbasing is carried out in at least two steps, at a temperature of less than 100 °C, at least one of the overbasing steps being followed by a heat-soaking step. The overbased detergents produced may be useful marine diesel lubricant additives.

On décrit un procédé de fabrication d'un détergent surbasique contenant essentiellement des cations de calcium et dont la basicité totale (TBN) est d'au moins 300, à partir d'au moins deux tensioactifs, dont l'un au moins est un tensioactif de phénol ou un tensioactif d'acide salicylique. Pour obtenir cette superbasicité, on utilise un processus en deux étapes, à une température inférieure à 100 DEG C, l'une au moins de ces étapes étant suivie d'une étape de chauffage/imprégnation. Les détergents surbasiques ainsi produits peuvent être utiles en tant qu'additifs de lubrification dans des moteurs marins Diesel.

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