High alkalinity sulfurized alkylphenates of alkaline earth metals and method of making same
AssigneeOrogil
InventorJean-Louis Le Coent
Life of this patent
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Abstract
High alkalinity sulfurized alkylphenates of alkaline earth metals useful as lubricating oil additives and methods of making them are disclosed. A sulfurized alkylphenol is neutralized with an alkaline-earth base in the presence of an oil, a glycol, and halide ions, the glycol being present in the form of a mixture with an alcohol having a boiling point above 150.degree. C. Alcohol, glycol, water, and sediment are removed from the resultant medium and the medium is then carbonated. After carbonation, alcohol, glycol, water, and sediment are removed.
Claims26
A method of preparing high alkalinity sulfurized alkylphenates of alkaline earth metals, comprising the steps of:
- (a) neutralizing a sulfurized alkylphenol in a neutralization medium with an alkaline earth base, the quantity of said alkaline earth base being such as to yield an alkaline earth base to alkylphenol molar ratio of from about 0.4/1 to about 3/1, said neutralization being performed in the presence of such quantities of a dilution oil, a glycol, and halide ions, the glycol being present in the form of a mixture with an alcohol having a boiling point above 150.degree. C., so as to yield an alcohol to glycol molar ratio of at least about 0.4/1, an alkaline earth base to glycol molar ratio of from about 2.6/1 to about 8/1, and a molar ratio of halide ions to alkaline earth base of from about 0.01/1 to about 0.15/1;
- (b) removing alcohol, glycol, and water from the medium;
- (c) removing sediment from the medium;
- (d) carbonating the medium, in the presence of halide ions, with a quantity of CO.sub.2 so as to yield a CO.sub.2 to alkaline earth metal molar ratio of from about 0.25/1 to about 0.75/1;
- (e) removing alcohol, glycol, and water from the medium;
- and
- (f) removing sediment from the medium.
A lubricating oil additive prepared according to a method comprising the steps of:
- (a) neutralizing a sulfurized alkylphenol in a neutralization medium with an alkaline earth base, the quantity of said alkaline earth base being such as to yield an alkaline earth base to alkylphenol molar ratio of from about 0.4/1 to about 3/1, said neutralization being performed in the presence of such quantities of a dilution oil, a glycol, and halide ions, the glycol being present in the form of a mixture with an alcohol having a boiling point above 150.degree. C., so as to yield an alcohol to glycol molar ratio of at least about 0.4/1, an alkaline earth base to glycol molar ratio of from about 2.6/1 to about 8/1, and a molar ratio of halide ions to alkaline earth base of from about 0.01/1 to about 0.15/1;
- (b) removing alcohol, glycol, and water from the medium;
- (c) removing sediment from the medium;
- (d) carbonating the medium in the presence of halide ions, with a quantity of CO.sub.2 so as to yield a CO.sub.2 to alkaline earth metal molar ratio of from about 0.25/1 to about 0.75/1;
- (e) removing alcohol, glycol, and water from the medium;
- and
- (f) removing sediment from the medium.
Dependencies are inferred from the claim text.