Mixed metal complex salts of phosphoric acid esters and mineral oil compositions containing the same

Claim 1

A MINERAL LUBRICATING OIL CONTAINING A MINOR PROPORTION, SUFFICIENT TO IMPROVE THE DETERGENT CHARACTER THEREOF, OF A MIXED-METAL, ZINC-CONTAINING COMPLEX SALT OF A PARTIAL ESTER OF PHOSPHORIC ACID HAVING A METAL CONTENT GREATER THAN THAT WHICH WOULD BE EQUIVALENT TO THE ACID-HYDROGEN CONTENT OF SAID PARTIAL ESTER PREPARED BY THE STEPS OF (1) REACTING ONE MOL OF PHOSPHORUS PENTOXIDE WITH FROM ABOUT ONE TO ABOUT THREE MOLS OF AN ORGANIC HYDROXY COMPOUND SELECTED FROM THE GROUP CONSISTING OF A HYDROXY-AROMATIC COMPOUND THAT HAS AN ALKY SUBSTITUENT HAVING AT LEAST 8 CARBONATOMS IN PLACE OF A NUCLEAR HYDROGEN ATOM THEREOF AND A PRIMARY, ALIPHATIC ALCOHOL HAVING AT LEAST 8 CARBON ATOMS PER MOLECULE, TO FORM AN ACIDIC, PARTIAL ESTER OF PHOSPHORIC ACID WITH A ZINC SALT ACIDIC, PARTIAL ESTE OF PHOSPHORIC ACID WITH A ZINC SALT REAGENT IN AN AMOUNT SUFFICIENT TO FURNISH AT LEAST ONE EQUIVALENT OF ZINC PER EQUIVALENT OF ACID-HYDROGEN CONTENT IN SAID ACIDIC, PARTIAL ESTER OF PHOSPHORIC ACID, AND (3) REACTING THE PRODUCT OBTAINED IN STEP 2 WITH A METAL HYDROXIDE SELECTED FROM THE GROUP CONSISTING OF CALCIUM HYDROXIDE, BARIUM HYDROXIDE, STRONTIUM HYDROXIDE, CADMIUM, HYDROXIDE, MAGNESIUM HYDROXIDE AND COBALT HYDROXIDE, IN AN AMOUNT SUFFICIENT TO FURNISH AT LEAST ONE EQUIVALENT OF METAL PER EQUIVALENT OF ACID-HYDROGEN CONTENT IN SAID ACIDIC, PARTIAL ESTER OF PHOSPHORIC ACID.