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2 100 425

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C1

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IPC

(21) (22)

Application

95117864/04, 1995-10-20

(22)

Actual filing date

1995-10-20

(45)

Published

1997-12-27

(72)

Inventor

Dmitrieva Z.T.Kashtykin S.I.Zelenskij M.I.Rodionova N.I.Smirnov P.L.Gorbunova E.A.

(73)

Holder

Institut Khimii Nefti So RanAktsionernoe Obshchestvo

METHOD FOR PURIFYING SPENT OIL Russian patent published in 1997 - IPC

Abstract RU 2100425 C1

FIELD: metal working industry; use of liquid oil derivatives as lubricants and coolants. SUBSTANCE: proposed method resides in subjecting spent oil to treatment with hydrochloric and sulfuric acids diluted to concentration 2-40 wt.-%, acid-to-oil volume ratio being from 1:1 to 1:15. Duration of oil-and-acids contact is from 5 to 30 min without heating. EFFECT: higher efficiency. 4 cl, 1 tbl

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RU 2 100 425 C1

Authors

Dmitrieva Z.T.

Kashtykin S.I.

Zelenskij M.I.

Rodionova N.I.

Smirnov P.L.

Gorbunova E.A.

Dates

1997-12-27—Published

1995-10-20—Filed

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