PROCESS FOR ENVIROMENT FRIENDLY TREATING OF CONTAMINATED OILY EMULSIONS ARISING DURING METAL-WORKING

• Main Authors: ABEL MARIETTA, KIRICSI IMRE DR, KONYA ZOLTAN DR, HALASZ JANOS DR
• Format: Patent
• Language: English
• Published: 28.12.2009
• Subjects: CHEMISTRY; CRACKING HYDROCARBON OILS; FUELS; LUBRICANTS; LUBRICATING COMPOSITIONS; METALLURGY; MINERAL WAXES; PEAT; PERFORMING OPERATIONS; PETROLEUM, GAS OR COKE INDUSTRIES; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; SEPARATION; TECHNICAL GASES CONTAINING CARBON MONOXIDE; TRANSPORTING; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION

Process of separating contaminated oil in water emulsions produced by machining of metal, and to reduce the chemical oxygen demand (COD) value of the aqueous phase below 40 mg/l, comprises adding a strong mineral acid to the treated emulsion, setting the pH value to 1-5; then adding a metal of negative standard electrode potential to the acidic emulsion; mixing intensively the mixture; then let to stay until the separation of the oily and aqueous phases; and educing the separated phases. Process of separating contaminated oil in water emulsions produced by machining of metal, and to reduce the chemical oxygen demand (COD) value of the aqueous phase below 40 mg/l, comprises adding a strong mineral acid to the treated emulsion, setting the pH value to 1-5, where the volume proportion of the emulsion to acid is 40:1 to 1:1; then adding a metal of negative standard electrode potential to the acidic emulsion in a molar proportion of 0.1-0.5, i.e. such a quantity of metal is added that the solution remains acidic when the production of hydrogen gas is finished; mixing intensively the mixture; then let to stay until the separation of the oily and aqueous phases; and educing separated phases.