WASTE LUBRICATION OIL PURIFICATION PROCESS Russian patent published in 2005 - IPC

Abstract RU 2246533 C2

FIELD: lubricants.

SUBSTANCE: invention relates to methods for purifying petroleum-derived oils and can be used for removing suspended impurities from waste motor oils at railway enterprises, engineering plants, big fleets, and the like. Waste water is purified by preliminarily heating oil to 70-75^оС, adding urea in the form of 30-50% aqueous solution in amount 0.5-1% on the weight of oil, and separating impurities. According to invention, after addition of urea, 2-2.5% of ethyl alcohol is added.

EFFECT: improved refining quality.

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RU 2 246 533 C2

Authors

Toltinova L.A.

Khoroshev S.V.

Sirotina V.V.

Soljanov A.N.

Dates

2005-02-20—Published

2002-12-23—Filed