Antiwear system for improved copper corrosion
AssigneeAfton Chemical Corporation
InventorsBrandon Knouse, David Edwards, Magdalena Makowska, Keith Hayes, Gregory James
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Abstract
An organometallic phosphorus-providing antiwear additive and a lubricating composition including the organometallic phosphorus-providing antiwear additive having improved copper corrosion performance obtained by reacting an organic hydroxy compound with phosphorus pentasulfide to form a reaction product, distilling the reaction product and recovering a condensate, and neutralizing the condensate with a basic or neutral metal compound including one or more of a metal oxide, a metal hydroxide, or a metal carbonate to form the organometallic phosphorus-providing antiwear additive or salt thereof.
Claims27
A lubricating composition comprising:
- a majority of one or more base oils of lubricating viscosity;
- an organometallic phosphorus-providing antiwear additive or salt thereof made by a process comprising the steps of (a) reacting an organic hydroxy compound with phosphorus pentasulfide to form a reaction product;
- (b) distilling the reaction product and recovering a condensate;
- and (c) neutralizing the condensate with a basic or neutral metal compound including one or more of a metal oxide, a metal hydroxide, or a metal carbonate to form the organometallic phosphorus-providing antiwear additive or salt thereof.
A method of preparing an organometallic phosphorus-providing antiwear additive, the method comprising:
- reacting an organic hydroxy compound with phosphorus pentasulfide to form a reaction product;
- distilling the reaction product and recovering a condensate therefrom;
- and
- neutralizing the condensate with a basic or neutral metal compound including one or more of a metal oxide, a metal hydroxide, or a metal carbonate to form the organometallic phosphorus-providing antiwear additive or salt thereof.
An organometallic phosphorus-providing antiwear additive or salt thereof made by a process comprising the steps of (a) reacting an organic hydroxy compound with phosphorus pentasulfide to form a reaction product;
- (b) distilling the reaction product and recovering a condensate;
- and (c) neutralizing the condensate with a basic or neutral metal compound including one or more of a metal oxide, a metal hydroxide, or a metal carbonate to form the organometallic phosphorus-providing antiwear additive or salt thereof.
Dependencies are inferred from the claim text.