Manufacture of magnesium salts of high molecular weight alkylated hydroxy aromatic copounds and their use in lubricating oils

Claim 1

IN THE MANUFACTURE OF A MAGNESIUM SALT OF AN ALKYL SUBSTITUTED HYDROXY AROMATIC HYDROCARBON CONSISTING OF CARBON, HYDROGEN AND OXYGEN, WHEREIN THE ALKYL SUBSTITUENTS ON THE RING CONTAINES FROM 15 TO 30 CARBON ATOMS, THE METHOD WHICH COMPRISES REACTING UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS THE ALKYL SUBSTITUTED HYDROXY AROMATIC HYDROCARBON CONSISTING OF CARBON, HYDROGEN AND OXYGEN IN SOLUTION IN AN ORGANIC SOLVENT WITH A MAGNESIUM ALCOHOLATE SOLUTION CONSISTING OF MAGNESIUM ALCOHOLATE DISSOLVED IN AN EXCESS OF THE CORRESPONDING ANHYDROUS ALCOHOL SELECTED FROM THE GROUP CONSISTING OF THE LOWER MOLECULAR WEIGHT ALIPHATIC ALCOHOLS CONTAINING FROM 1 TO 5 CARBON ATOMS IN THE MOLECULE, SAID ORGANIC SOLVENT HAVING A HIGHER BOILING POINT THAN THAT OF WATER AS WELL AS SAID ALCOHOL, HEATING SAID REACTION MIX AT MILDLY ELEVATED TEMPERATURES AT WHICH THE ALIPHATIC ALCOHOL IS DISTILLED OFF BUT BELOW THE BOILING POINT OF SAID ORGANIC SOLVENT, TO OBTAIN A SOLUTION OF THE MAGNESIUM SALT OF THE ALKYL SUBSTITUTED HYDROXY AROMATIC HYDROCARBON IN THE SAID ORGANIC SOLVENT, THE QUANTITY OF MAGNESIUM ALCOHOLATE BEING LESS THAN THE CALCULATED STOICHIOMETRIC AMOUNT REQUIRED FOR NEUTRALIZATION OF THE QUANTITY OF ALKYL SUBSITUTED HYDROXY AROMATIC HYDROCARBON PRESENT.