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2 030 463

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IPC

(21) (22)

Application

4886189/02, 1990-10-30

(22)

Actual filing date

1990-10-30

(45)

Published

1995-03-10

(72)

Inventor

Mikhlin E.B.Karmannikov V.P.Evteev V.V.Kazantsev V.N.Kovalev V.V.Leonov A.P.Klimenko M.A.Berezkina V.V.

(73)

Holder

Gosudarstvennyj Nauchno-Issledovatel'Skij Proektnyj Institut Redkometallicheskoj Promyshlennosti

METHOD OF NEODYMIUM EXTRACTION FROM CONCENTRATE OF RARE-EARTH METAL OF CERIUM SUBGROUP Russian patent published in 1995 - IPC

Abstract RU 2030463 C1

FIELD: metallurgy. SUBSTANCE: after electrochemical oxidation of cerium the solution of rare-earth metal concentrate (content of CeO₂ is 50-60 wt.-% ) is added to the parent nitrate solution at the ratio 1:(6-10). Extraction is carried out with tributylphosphate at the weight sum of rare-earth metals in parent solution and extractant = 1:(0.6-0.8), and raffinate is prepared. Neodymium is reextracted from organic phase. EFFECT: improved method of neodymium extraction. 1 tbl

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RU 2 030 463 C1

Authors

Mikhlin E.B.

Karmannikov V.P.

Evteev V.V.

Kazantsev V.N.

Kovalev V.V.

Leonov A.P.

Klimenko M.A.

Berezkina V.V.

Dates

1995-03-10—Published

1990-10-30—Filed