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AssigneeThe Lubrizol Corporation
InventorsWilliam R.S. Barton, Stephen J. Cook, Daniel J. Saccomando, Alexandra Mayhew, Joanne L. Jones, Shaun P. Carney
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The present invention relates to a lubricating composition, particularly marine diesel engine lubricating compositions, comprising: (a) an oil of lubricating viscosity; (b) an asphaltene dispersant comprising a cyclic headgroup that contains a nitrogen atom and at least one other heteroatom; and (c) a detergent derived from an alkyl phenol. The invention further provides methods of using such compositions in the operation of engine, particularly marine diesel engines.
A lubricating composition comprising:
A process of preparing an asphaltene dispersant comprising the steps of reacting a substantially linear compound that contains at least one oxygen atom and at least two nitrogen atoms where the nitrogen atoms are separated by two or three carbon atoms with itself, such that the compound forms a ring structure containing the two nitrogen atoms.
Dependencies are inferred from the claim text.