Process for preparing complex calcium salt-calcium soap grease

Claim 1

IN THE PREPARATION OF AN EXTREME PRESSURE CALCIUM BASE GREASE COMPRISING ESSENTIALLY A LUBRICATING OIL AS THE CHIEF COMPONENT, ABOUT 13-24 PERCENT BY WEIGHT OF A CALCIUM SALT OF A LOW MOLEUCLAR WEIGHT FATTY ACID AND ABOUT 4-10 PERCENT BY WEIGHT OF A CALCIUM FATTY ACID SOAP, BY THE METHOD WHICH COMPRISES FORMING A MIXTURE IN A 7:1-20:1 MOL RATIO RESPECTIVELY OF A CALCIUM SALT OF A SATURATED C1-3 FATTY ACID AND A CALCIUM SOAP OF A HIGH MOLECULAR WEIGHT FATTY ACID BY SAPONIFYING A MIXTURE OF AN ALIPHATIC MONOCARBOXYLIC ACID CONTAINING 1-3 CARBON ATOMS AND A HIGHER ALIPHATIC MONOCARBOXYLIC ACID MATERIAL CHOSEN FROM THE CLASS CONSISTING OF SUBSTANTIALLY SATURATED UNSUBSTITUTED AND HYDROXY SUBSTITUTED C12-18 FATTY ACIDS, MIXTURES THEREOF AND THEIR ESTERS, WITH A BASIC REACTING CALCIUM COMPOUND IN A PORTION OF THE LUBRICATING OIL CONTAINED IN THE FINISHED GREASE, CARRYIN GOUT A HEAT TREATING STEP UPON THE SAID MIXTURE AT AN ELEVATED TEMPERATURE ABOVE ABOUT 250*F. BUT BELOW 400*F. UNTIL AT LEAST SUBSTANTIAL THICKENING HAS OCCURED, AND THEREAFTER COOLING THE SAID MIXTURE AND ADDING ADDITIONAL LUBRICATING OIL, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE SAID TREATING STEP UPON THE SAID MIXTURE CONTAINING ABOUT 2575 PERCENT OF THE TOTAL LUBRICATING OIL CONTAINED IN THE FINISHED GREASE AND COMPRISING ABOU T 25 PERCENT TO ABOUT 67 PERCENT BY WEIGHT OF THE SAID CALCIUM SALT AND CALCIUM SOAP, WHILE SHEARING THE SAID MIXTURE BY CONTINUOUSLY WITHDRAWING A MINOR STREAM FROM A MAINTAINED BODY OF THE SAID MIXTURE, PASSING THE SAID STREAM THROUGH A SHEAR VALVE WITH A PRESSURE DROP OF ABOUT 25-200 POUNDS PER SQUARE INCH AND RETURNING THE SAID STREAM TO THE SAID MAINTAINED BODY OF MIXTURE.