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High alkalinity metallic detergent-dispersant additives for lubricating oils and method of making same
| Details |
Inventors: Le Coent, Jean-Louis; Demoures, Bernard;
Assignee: Orogil (Courbevoie, FR)
Primary Examiner: Howard; Jacqueline V.
Assistant Examiner:
Attorney, Agent or Firm:
High alkalinity metallic lubricating oil additives and a method of making them are disclosed. A magnesium alkylbenzenesulfonate and a sulfurized calcium alkylphenate are carbonated in the presence of an oil, magnesium oxide, a glycol, and an amine. The glycol, water, and sediment are then removed from the resulting medium. |
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DETAILED DESCRIPTION OF THE INVENTION In one preferred embodiment, the method of the invention comprises the steps of: (a) preparing a reaction medium comprising a magnesium alkylbenzenesulfonate with a T.
B.
N.
up to about 20, a sulfurized calcium alkylphenate with a T.
B.
N.
up to about 200, and a dilution oil; (b) carbonating the reaction medium in the presence of a milk of magnesia mixture comprising active magnesium oxide, a glycol, and an amine; (c) removing the glycol and the water from the medium, preferably by distillation; and (d) removing sediment from the medium, preferably by filtration.
In a second preferred embodiment, carbonation step (b) is preceded by precarbonating the reaction medium in the presence of a glycol and optionally sulfur.
As used herein, the term "magnesium alkylbenzenesulfonate" refer to any solution containing from about 25% to about 80% by weight, preferably from about 30% to about 70% by weight, of a magnesium alkylbenzenesulfonate in an oil which may or may not be the same as the dilution oil.
Among the magnesium alkylbenzenesulfonates useful in the present invention are the magnesium salts of sulfonic acids obtained by sulfonation of alkylbenzenes derived from C.
sub.
15 -C.
sub.
30 olefins or olefin polymers.
As used herein, the term "sulfurized calcium alkylphenate" refers to any solution containing from about 25% to about 70% by weight, preferably from about 30% to about 55% by weight, of a sulfurized calcium alkylphenate in an oil which may or may not be the same as the dilution oil.
Among the sulfurized calcium alkylphenates useful in the present invention are those obtained by the reaction of lime with a sulfurized alkylphenol, preferably a sulfurized alkylphenol having one or a plurality of alkyl substituents of C.
sub.
9 -C.
sub.
30, more preferably on the order of C.
sub.
9 -C.
sub.
22 such as the sulfurized nonyl, decyl, dodecyl or tetradecyl-phenols, the reaction optionally being followed by a carbonation step; those obtained by sulfurizing an alkylphenol in the presence of lime and glycol, preferably an alkylphenol having one or a plurality of alkyl substituents of C
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Heat Accumulators 
