Method of purifying oils containing liquid and solid impurities
Abstract
Abstract A PROCESS FOR REMOVING SOLID AND LIQUID IMPURITIES FROM USED OILS SUCH AS HYDRAULIC OILS, LUBRICATING OILS, QUENCH OILS, TRAMP OILS, CUTTING OILS AND OILS USED IN SHARPENING, FINISHING AND GRINDING OF METAL TOOLS AND PARTS, COMPRISING HEATING THE OIL, ADDING A SMALL AMOUNT OF AN ALKALINE SOLUTION TO THE OIL WHILE STIRRING THE OIL, MAINTAINING THE TREATED OIL AT A HEATED TEMPERATURE, SUBSEQUENTLY ADDING AN ACID TO THE TREATED OIL MIXTURE WHILE STIRRING THE OIL TO THOROUGHLY MIX THE ACID WITH THE OIL AND MAINTAINING THE TREATED OIL IN A STEELING CONTAINER AT A HEATED TEMPERATURE FOR A PERIOD OF AT LEAST ABOUT 10 HOURS IN ORDER TO ALLOW THE SOLIDS AND WATER TO SETTLE TO THE BOTTOM. THE PURIFIED OIL WHICH REMAINS ON TOP CAN THEN BE WITHDRAWN. SODIUM HYDROXIDE AND SULFURIC ACID ARE PREFERRED REACTANTS.
Inventors
- 👤 J Moffitt
Bibliographic Details
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