Lubricating oils containing carbonated basic sulfurized calcium phenates

Claim 1

AS A NEW COMPOSITION OF MATTER A CARBON DIOXIDE DERIVATIVE OF A BASIC SULFURIZED CALCIUM ALKYL PHENATE SALT PREPARED BY THE METHOD WHICH COMPRISES THE STEPS OF (1) FORMING A REACTION MIXTURE OF (A) A PHENOLIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF ALKYL-SUBSTITUTED PHENOLS HAVING UP, TO 30 CARBON ATOMS IN AN ALKYL SUBSTITUENT THEREOF, AND NORMAL CALCIUM SALTS OF SAID PHENOLS, (B) A CALCIUM BASE SELECTED FROM THE GROUP CONSISTING OF CALCIUM OXIDE AND CALCIUM HYDROXIDE, IN AN AMOUNT SUFFICIENT TO FORM A BASIC SULFURIZED CALCIUM ALKYL PHENATE HAVING A CALCIUM CONTENT UP TO ABOUT 100% IN EXCESS OF THAT PRESENT ON THE CORRESPONDING NORMAL CALCIUM PHENATE, (C) ELEMENTAL SULFUR IN AN AMOUNT OF FROM 10 TO 200 MOL PERCENT BASED ON CALCIUM AND (D) A GLYCOL CONTAINING LESS THAN 6 CARBON ATOMS, THE WEIGHT RATIO OF SAID GLYCOL TO SAID CALCIUM BASE USED BEING FROM 1 TO ABOUT 50, (2) HEATING THE REACTION MIXTURE TO A TEMPERATURE SUFFICIENT TO FORM SAID BASIC SULFURIZED CALCIUM ALKYL PHENATE SALT AND REMOVE WATER OF REACTION AND GLYCOL FROM THE REACTION MIXTURE AND (3) ADDING A MINERAL OIL DILUENT TO THE REACTION MIXTURE AND (4) PASSING CARBON DIOXIDE GAS INTO THE REACTION MIXTURE WHILE MAINTAINING THE TEMPERATURE OF SAID MIXTURE BETWEEN ABOUT 200*F. AND ABOUT 400*F., FOR A TIME SUFFICIENT TO INCORPORATE INTO THE BASIC SULFURIZED CALCIUM ALKYL PHENATE PRODUCT FROM ABOUT 0.2 MOL TO ABOUT 0.6 MOL OF CARBON DIOXIDE PER MOL OF CALCIUM IN SAID PRODUCT.