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2 153 527

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IPC

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Application

99119958/04, 1999-09-15

(24)

Start date

1999-09-15

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Actual filing date

1999-09-15

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Published

2000-07-27

(72)

Inventor

Dmitrieva Z.T.Averina N.V.

(73)

Holder

Zakrytoe Aktsionernoe Obshchestvo

METHOD OF REFINING SPENT LUBRICATING OILS Russian patent published in 2000 - IPC

Abstract RU 2153527 C1

FIELD: chemical industry. SUBSTANCE: spent oils are treated with extracting agent which is essentially mixture of mineral and organic acids at extracting agent to stock volume ratio from 1:0.5 to 1:60. Mineral acid, e. g. orthophosphoric acid is used at concentrations from 5 to 100 wt %, organic acid, e.g. fumaric, acetic, propionic or acrylic acid is used as 100% acid. Mineral acid to organic acid weight ratio varies from 1:0.01 to 1:1. EFFECT: shorter phase separation period of time, greater efficiency and the same degree of clarification of oil. 2 cl, 21 ex, 1 tbl

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RU 2 153 527 C1

Authors

Dmitrieva Z.T.

Averina N.V.

Dates

2000-07-27—Published

1999-09-15—Filed

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