Infineum USA LP

Alain Louis Pierre Lenack

Philip Skinner

Phenate/salicylate overbased detergents with high proportions of phenate and salicylate surfactants in the surfactant system and with TBN; % surfactant ratios of 11 or more are useful marine diesel lubricant additives.

Calcium overbased metal-containing detergents

Phenate detergents and salicylate detergents with high TBNs and/or high TBN: % surfactant ratios are useful marine diesel lubricant additives.

Phenate overbased detergents with high TBN: % surfactant ratios are useful lubricant additives.

Overbased metal-containing detergents

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&deg; 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.

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Rouen, France

Alain Louis Pierre Lenack