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2 094 450

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C1

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IPC

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Application

95117863/04, 1995-10-20

(22)

Actual filing date

1995-10-20

(45)

Published

1997-10-27

(72)

Inventor

Dmitrieva Z.T.Kashtykin S.I.Zelenskij M.I.Tikhonova L.D.Smirnov P.L.Gorbunova E.A.

(73)

Holder

Institut Khimii Nefti So RanAktsionernoe Obshchestvo

METHOD OF PURIFICATION OF SPENT INDUSTRIAL OIL Russian patent published in 1997 - IPC

Abstract RU 2094450 C1

FIELD: metal working. SUBSTANCE: claimed method comprises treating oil (feedstock) with phosphoric acid having concentration from 5 to 80 wt % in acid to feedstock ratio of 1:1 to 1:30 by volume for 2 to 30 minutes without heating. EFFECT: more efficient purification method. 3 cl, 1 tbl

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RU 2 094 450 C1

Authors

Dmitrieva Z.T.

Kashtykin S.I.

Zelenskij M.I.

Tikhonova L.D.

Smirnov P.L.

Gorbunova E.A.

Dates

1997-10-27—Published

1995-10-20—Filed

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