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2 538 255

(13)

(51)

IPC

C01G43/25(2006-01-01)

G21C3/00(2006-01-01)

(21) (22)

Application

2010136670/05, 2010-09-02

(24)

Start date

2010-09-02

(22)

Actual filing date

2010-09-02

(45)

Published

2015-01-10

(72)

Inventor

Deptula AndzhejBrykala MarsinLada VeslavaVavshchak DanutaOl'Chak TadeushKhmelevski Andzhej G.

(73)

Holder

Institut Khemii I Tekhniki Jondrovehj

METHOD OF PRODUCING URANIUM DIOXIDE IN FORM OF SPHERICAL AND IRREGULARLY SHAPED GRAINS Russian patent published in 2015 - IPC C01G43/25 G21C3/00

Abstract RU 2538255 C2

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing uranium dioxide in the form of spherical and irregularly shaped grains. The method includes dissolving, with intense stirring, uranium oxide UO₃ or UO₂(NO₃)₂×6H₂O in an organic acid, preferably ascorbic acid, treating the obtained ascorbic-hydroxy-uranium sol and heat treatment of the obtained gel at 550°C and heating rate of 5°C/min in an air medium until U₃O₈ forms, after which the obtained oxide is reduced in a hydrogen and/or argon atmosphere, preferably a hydrogen atmosphere, at 1100°C until formation of uranium dioxide in the form of spherical or irregularly shaped grains.

EFFECT: invention simplifies the process and reduces the time of producing uranium oxide and also reduces costs.

5 cl, 5 ex

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RU 2 538 255 C2

Authors

Deptula Andzhej

Brykala Marsin

Lada Veslava

Vavshchak Danuta

Ol'Chak Tadeush

Khmelevski Andzhej G.

Dates

2015-01-10—Published

2010-09-02—Filed