Novel organoammonium compounds are provided, which are useful as additives
for improving the antiwear and friction-reducing properties of
lubricating compositions. The compound is formed by reacting a metal acid
hydrate with one or more alkyl amines. Particular examples are the
preparation of ditridecylammonium tungstate, di-n-octylammonium tungstate
and ditridecylammonium molybdate.