Barium-calcium sulfonate complexes and lubricating compositions con- taining same

Claim 1

A PROCESS FOR PREPARING A CARBONATED BARIUM-CALCIUM SULFONATE COMPLEX HAVING A METAL RATIO OF AT LEAST 10 WHICH COMPRISES PREPARING AND MIXING A MASS IN WHICH, AT 50*C., AT LEAST 50 PERCENT OF THE COMPONENTS ARE IN THE LIQUID STATE, AND IN WHICH MASS THE ACTIVE COMPONENTS CONSIST OF: (A) A SULFONATE SELECTED FROM THE GROUP CONSISTING OF OIL SOLUBLE SULFONIC ACIDS HAVING A TOTAL OF AT LEAST ABOUT 15 CARBON ATOMS AND THE BARIUM SALTS THEREOF; (B) A PHENOLIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF PHENOLS AND THE BARIUM SALTS THEREOF; THE EQUIAVLENTS OF A:B BEING IN THE RANGE FROM ABOUT 1:10 TO ABOUT 10:1; (C) A BARIUM BASE, IN AN AMOUNT SUCH THAT THERE IS PRESENT IN THE MASS A TOTAL OF AT LEAST ABOUT 3 EQUIVALENTS OF BARIUM PER EQUIVALENT OF A, AND (D) WATER, IN AN AMOUNT EQUAL TO AT LEAST ABOUT ONETENTH MOLE PER MOLE OF C; MAINTAINING THE MASS AT A TEMPERATURE AND FOR A PERIOD OF TIME SUFFICIENT TO DRIVE OFF SUBSTANTIALLY ALL WATER WHICH MAY BE PRESENT, AND FORM A BARIUM SULFONATE COMPLEX; TREATING SAID BARIUM SULFONATE COMPLEX WITH CARBON DIOXIDE IN AN AMOUNT SUFFICIENT TO LIBERATE A SUBSTANTIAL PROPORTION OF SAID PHENOL OF B; MIXING SAID CARBON DIOXIDETREATED BARIUM SULFONATE COMPLEX WITH: (E) A CALCIUM BASE, IN AN AMOUNT SUCH THAT THERE IS PRESENT IN THE MASS A TOTAL OF AT LEAST ABOUT 10 EQUIVALENTS OF BARIUM AND CALCIUM PER EQUIVALENT OF A; (F) A LOWER ALIPHATIC MONOHYDRIC ALCOHOL, IN THE AMOUNT OF AT LEAST ABOUT 5 PERCENT BY WEIGHT OF SAID CARBON DIOXIDE-TREATED BARIUM SULFONATE COMPLEX; AND THEN TREATING THE MIXTURE WITH CARBON DIOXIDE AND HEATING IT TO DRIVE OFF SUBSTANTIALLY ALL THE LOWER ALCOHOL AND ANY WATER PRESENT.