| 摘要 |
PROBLEM TO BE SOLVED: To provide an additive which has a satisfactory color appearance, a low chlorine content, and a sulfur-to-molybdenum ratio acceptable to be significantly benign to copper corrosion and seal degradation.SOLUTION: A process for making an additive comprising one or more oil-soluble or oil-dispersible molybdenum-sulfur compounds comprises the steps of: (I) reacting in a polar medium a reactant molybdenum compound (A) and a source of a ligand (B), which is capable of rendering molybdenum-sulfur compounds oil-soluble or oil-dispersible; and (II) reacting a compound (C), which is capable of reacting with labile sulfur, with either (a) the reaction mixture of the step (I) after the reaction of (A) and (B) has begun, or (b) the product of the step (I). |
