SULFITE OVERBASED PRODUCTS AND PROCESS

摘要

Sulfite overbased compositions which are particularly useful in metal-working compositions are obtained by a process including reacting: (A) an alkali metal overbased organic substrate prepared by treating the substrate with a source of an alkali metal and an acidic material wherein the acidic material has a higher pKa than sulfurous acid; with (B) a source of sulfurous acid to displace at least a portion of the acidic material from the overbased organic substrate (A); thereby obtaining a sulfite overbased organic substrate. u