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2 171 785

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IPC

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Application

2000104720/12, 2000-02-28

(24)

Start date

2000-02-28

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Actual filing date

2000-02-28

(45)

Published

2001-08-10

(72)

Inventor

Tatarinov A.N.Izovskaja L.N.Monastyrev Ju.A.Vilkaj E.A.

(73)

Holder

Gosudarstvennoe Predprijatie Kombinat

METHOD OF PREPARING ISOTOPE-ENRICUID METALLIC RHENIUM Russian patent published in 2001 - IPC

Abstract RU 2171785 C1

FIELD: recovery and purification of rhenium. SUBSTANCE: rhenium is concentrated from solution in the form of sulfide. Dissolution of sulfide in hydrogen peroxide gives concentrated solution of rhenic acid. Rhenic acid is neutralized with ammonia and evaporated to dry ammonium perrhenate residue. In order to separate impurities, ammonium perrhenate is washed with ammonia at S: L ratio of 1:3 Pa. Treatment is carried out three of four times when cooling pulp to 0 C and separating flushing fluid by decantation. Pure ammonium perrhenate is reduced to metal. EFFECT: pure rhenium when isotope composition is retained at minium losses. 4 cl, 5 ex

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RU 2 171 785 C1

Authors

Tatarinov A.N.

Izovskaja L.N.

Monastyrev Ju.A.

Vilkaj E.A.

Dates

2001-08-10—Published

2000-02-28—Filed

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