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2 067 125

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Application

93002044/02, 1993-01-11

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Actual filing date

1993-01-11

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Published

1996-09-27

(72)

Inventor

Vlasov E.A.Bazhina T.A.Lomonosov V.N.Khajdov V.V.Khudjakov V.M.Ponomarev A.A.Murashkin Ju.V.Makarov V.V.Loskutov A.I.

(73)

Holder

Kombinat Rossijskogo Gosudarstvennogo Kontserna Po Proizvodstvu Tsvetnykh Metallov Nikel'"Sankt-Peterburgskij Gosudarstvennyj Tekhnologicheskij Institut

METHOD OF EXTRACTION OF NOBLE METAL FROM ACID SULFATE SOLUTION Russian patent published in 1996 - IPC

Abstract RU 2067125 C1

FIELD: chemical technology of noble metals. SUBSTANCE: method involves passing parental solution through the layer of carbon adsorbent. Used adsorbent is subjected for preliminary demineralization by acidic treatment and thermic working in inert atmosphere. Noble metals were extracted by 99.9% together with separation of palladium from other platinum metals at the stage of partial desorption. Palladium and silver desorption is carried out with 20% nitric acid solution and other platinum metals were retained on coal. After treatment with nitric acid coal is washed with water, dried and subjected for thermic working in inert medium and then used repeatedly for extraction of platinum metals from acidic sulfate solutions. The same coal can be used for 6-10 cycles. One gram coal can adsorb up to 400 mg platinum metals. Then coal is calcined and high-quality concentrate of platinum metals is obtained. EFFECT: improved method of noble metals extraction. 1 dwg, 1 tbl

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RU 2 067 125 C1

Authors

Vlasov E.A.

Bazhina T.A.

Lomonosov V.N.

Khajdov V.V.

Khudjakov V.M.

Ponomarev A.A.

Murashkin Ju.V.

Makarov V.V.

Loskutov A.I.

Dates

1996-09-27—Published

1993-01-11—Filed

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