Metal-working emulsion reclaiming process
AssigneeDober Chemical Corporation
InventorsJohn F. Dobrez, Jose T. Jacob
Life of this patent
Estimating the term…
Abstract
A method for reclaiming an aqueous emulsion useful as a metal-working lubricant/coolant which is contaminated with particles of at least one metal comprises contacting the contaminated emulsion with at least one metal solubilizing agent at metal solubilizing conditions to solubilize at least a portion of the metal particles. The thus contacted emulsions have improved suitability as a metal-working lubricant/coolant relative to the contaminated emulsion.
Claims16
A method for reclaiming an aqueous emulsion contaminated with particles of at least one metal selected from the group consisting of aluminum, iron, tin, and mixtures thereof, which contaminated emulsion includes about 40% to about 99.5% by volume of water and in the uncontaminated state is useful as a metal-working lubricant, said method comprising contacting said contaminated emulsion with at least one added basic material at metal solubilizing conditions including a temperature in the range of about 60.degree. F. to about 180.degree. F. and a pH of the aqueous portion of said contaminated emulsion in the range of about 9 to about 13.5 for a period of time not greater than about 2 hours to solubilize at least a portion of said metal particles, and contacting said emulsion with at least one acidic material to adjust the pH of said emulsion to a level so that said emulsion is suitable for use as said metal-working lubricant.
Dependencies are inferred from the claim text.