Soluble oil compositions for metal working

Claim 1

THE METHOD OF EXTENDING THE LIFE OF A USED OIL-INWATER EMULSION LUBRICANT FOR THE ROLLING OF METALS, SAID EMULSION BEING NORMALLY SUSCEPTIBLE TO EMULSION BREAKDOWN BY THE ACCUMULATION OF POLYVALENT METAL IONS DERIVED FROM THE SAID METAL BEING ROLLED WHICH ARE DISSOLVED IN THE EMULSION, COMPRISING THE STEPS OF: (1) USING THE EMULSION CONSISTING ESSENTIALLY OF AT LEAST 90% BY VOLUME POLYVALENT METAL, SAID WATER NORMALLY CONTAINING LESS POLYVALENT METAL IONS DISSOLVED THEREIN THAN IS SUFFICIENT TO CAUSE EMULSION BREAKDOWN AND UP TO 10% BY VOLUME OF AN EMULSIFIABLE MINERAL OIL AS A LUBRICANT IN NORMAL METAL ROLLING OPERATIONS AND MECHANICALLY REMOVING FROM SAID EMULSION AFTER EACH METAL ROLLING OPERATION THE SOLID METAL PARTICLES AND SEPARATED OIL; (2) PERMITTING THE CONCENTRATION OF DISSOLVED POLYVALENT METAL IONS IN THE SAID REMAINING USE EMULSION TO RISE WITH EACH ROLLING OPERATION UNTIL IT REACHES A LEVEL AT WHICH EMULSION BREAKDOWN TENDS TO OCCUR; AND (3) ADDING TO THE SAID REMAINING USED EMULSION A SEQUESTERING AGENT CAPABLE OF RESISTING THE METAL IONINDUCED BREAKDOWN OF SAID EMULSION, WHEREIN THE SAID METAL ION IS SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM, ALUMINUM, AND IRON, THE METAL OF SAID ION BEING PRESENT IN THE METAL BEING ROLLED.

Claim 2

THE METHOD OF EXTENDING THE LIFE OF A USED OIL-INWATER EMULSION LUBRICANT FOR THE ROLLING OF METALS, SAID EMULSION BEING NORMALLY SUSCEPTIBLE TO EMULSION BREAKDOWN BY THE ACCUMULATION OF POLYVALENT METAL IONS DERIVED FROM THE SAID METAL BEING ROLLED WHICH ARE DISSOLVED IN THE EMULSION, COMPRISING THE STEPS OF: (1) USING THE EMULSION CONSISTING ESSENTIALLY OF AT LEAST 90% BY VOLUME POLYVALENT METAL, SAID WATER NORMALLY CONTAINING LESS POLYVALENT METAL IONS DISSOLVED THEREIN THAN IS SUFFICIENT TO CAUSE EMULSION BREAKDOWN AND UP TO 10% BY VOLUME OF AN EMULSIFIABLE MINERAL OIL AS A LUBRICANT IN NORMAL METAL ROLLING OPERATIONS AND MECHANICALLY REMOVING FROM SAID EMULSION AFTER EACH METAL ROLLING OPERATION THE SOLID METAL PARTICLES AND SEPARATED OIL; (2) PERMITTING THE CONCENTRATION OF DISSOLVED POLYVALENT METAL IONS IN THE SAID REMAINING USE EMULSION TO RISE WITH EACH ROLLING OPERATION UNTIL IT REACHES A LEVEL AT WHICH EMULSION BREAKDOWN TENDS TO OCCUR; AND (3) ADDING TO THE SAID REMAINING USED EMULSION A SEQUESTERING AGENT CAPABLE OF RESISTING THE METAL IONINDUCED BREAKDOWN OF SAID EMULSION, WHEREIN THE SAID METAL ION IS SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM, ALUMINUM, AND IRON, THE METAL OF SAID ION BEING PRESENT IN THE METAL BEING ROLLED.