Process for preparing a sulfurized molybdenum-containing composition and lubricating oil containing said composition
First Claim
1. a process for preparing a sulfurized molybdenum-containing composition which comprises reacting ammonium tetrathiomolybdate and a basic nitrogen compound selected from the group consisting of a succinimide, carboxylic acid amide, hydrocarbyl monoamine, hydrocarbon polyamine, Mannich base, phosphonamide, thiophosphonamide, phosphoramide, or dispersant viscosity index improvers, or mixtures thereof, wherein from 0.01 to 2.00 atoms of molybdenum are present per basic nitrogen atom, in the presence of a polar promoter wherein from 0.1 to 50 mols of promoter are present per mol of molybdenum, in order to form a sulfur and molybdenum-containing composition.
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Abstract
Antioxidant additives for lubricating oil are prepared by combining a polar promoter, ammonium tetrathiomolybdate, and a basic nitrogen compound complex to form a sulfur- and molybdenum-containing composition.
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Citations
15 Claims
- 1. a process for preparing a sulfurized molybdenum-containing composition which comprises reacting ammonium tetrathiomolybdate and a basic nitrogen compound selected from the group consisting of a succinimide, carboxylic acid amide, hydrocarbyl monoamine, hydrocarbon polyamine, Mannich base, phosphonamide, thiophosphonamide, phosphoramide, or dispersant viscosity index improvers, or mixtures thereof, wherein from 0.01 to 2.00 atoms of molybdenum are present per basic nitrogen atom, in the presence of a polar promoter wherein from 0.1 to 50 mols of promoter are present per mol of molybdenum, in order to form a sulfur and molybdenum-containing composition.
Specification