process for the production of an alkaline metallic salt oelloeslichen, surplus labour - metallsulfonat complex

摘要

Mineral lubricating oil compositions contain soluble Ba, Ca or Sr formate/overbased sulphonate complexes which contain at least 200% more metal than the normal sulphonates. In examples, the compositions contain as an optional ingredient sulphurized Ca phenate/carbonate.ALSO:The invention comprises oil-soluble Ba, Ca or Sr formate/overbased sulphonate complexes, having a metal content at least 200% higher than the normal sulphonates, obtainable by reacting the corresponding carbonate/overbased sulphonate complex with formic acid to completely convert the carbonate component to formate.