Tall oil pitch-phosphorus sulfide reaction product and metallic salts as dispersants for lubricating oils

Claim 1

A LUBRICATING OIL COMPOSITION COMPRISING A HYDROCARBON LUBRICATING OIL HAVING DISSOLVED THEREIN A DETERGENT COMPOSITION OPERATIVE TO ASSIST IN PREVENTING THE DEPOSITION OF HARD DEPOSITS DUE TO SLUDGE FORMATION IN THE OIL, SAID DETERGENT COMPOSITION COMPRISING AS ITS ESSENTIAL INGREDIENT A NEUTRALIZED REACTION PRODUCT RESULTING FROM CHEMICALLY REACTING PHOSPHOROUS SESQUISULFIDE WITH A MIXTURE COMPRISING A MATERIAL CONTAINING A MEMBER OF THE GROUP CONSISTING OF AN UNSATURATED ESTER WAX, A PARTIALLY SPONIFIED UNSATURATED ESTER WAX, AND A COMPLETELY SAPONIFIED UNSATURATED ESTER WAX AND A MATERIAL OF THE GROUP CONSISTING OF REFINED TALL OIL PITCH, PARTIALLY SAPONIFIED REFINED TALL OIL PITCH, AND COMPLETELY SAPONIFIED REFINED TALL OIL PITCH IN THE PRESENCE OF A FREE-OXYGEN CONTAINING GAS AND AT A TEMPERATURE TO PROMOTE SUCH A REACTION; AND NEUTRALIZING THE PRODUCT OF SUCH REACTION WITH A MEMBER OF THE GROUP CONSISTING OF METAL OXIDES AND HYDROXIDES.