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2 036 148

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C1

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IPC

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Application

4947627/26, 1991-06-21

(22)

Actual filing date

1991-06-21

(45)

Published

1995-05-27

(72)

Inventor

Komissarova L.N.Mel'Nikov P.P.Pushkina G.Ja.Karavajko G.I.Avakjan Z.A.Voronchikhin D.A.

(73)

Holder

Khimicheskij Fakul'Tet Mgu Im.M.V.LomonosovaInstitut Mikrobiologii Ran

PROCESS OF EXTRACTING RARE-EARTH ELEMENTS FROM PHOSPHORUS-CONTAINING MINERAL STOCK Russian patent published in 1995 - IPC

Abstract RU 2036148 C1

FIELD: chemistry, particularly, processing of apatite. SUBSTANCE: essence of this process resides in that apatite is treated with culture liquid Aspergillus niger at stock-to-culture liquid ratio of 1:(5 to 10) and pH value of 2.0 to 3.5, scandium is extracted into solution (100 %) and other rare-earth elements are lixiviated (0.5 to 14.0 %). Disclosed process lasts about 10 h. EFFECT: more sophisticated technique. 1 tbl

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RU 2 036 148 C1

Authors

Komissarova L.N.

Mel'Nikov P.P.

Pushkina G.Ja.

Karavajko G.I.

Avakjan Z.A.

Voronchikhin D.A.

Dates

1995-05-27—Published

1991-06-21—Filed

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