METHOD FOR REGENERATION OF EXHAUST INDUSTRIAL OIL Russian patent published in 2006 - IPC C10M175/02 

FIELD: petrochemistry.

SUBSTANCE: industrial oil is treated with purifying reagent. As purifying reagent 25-40 % fresh aqueous solution of chloramine, benzene sulfonic acid and calcium chloride mixture in mass ratio of 3-7:1-2:5, respectively, is used. Said reagent is charged into exhaust industrial oil heated to 15-60°C in amount of 5-60 kg per 1 m³ of oil (calculated as dry matter). Process includes 60 cycles comprising sequential steps of mixture agitation for 0.5-3 h and conditioning for 1-12 h. Then obtained product is conditioned for 24-48 h, upper oil layer is drawn off and product is conditioned again at 15-55°C for 7-14 days followed by drawing off of target product-containing upper layer.

EFFECT: decreased energy consumption; increased purifying ratio.

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