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2 481 411

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(51)

IPC

C22B60/02(2006-01-01)

C22B3/08(2006-01-01)

C22B3/26(2006-01-01)

(21) (22)

Application

2012104072/02, 2012-02-06

(24)

Start date

2012-02-06

(22)

Actual filing date

2012-02-06

(45)

Published

2013-05-10

(72)

Inventor

Akimova Irina DanilovnaMeshkov Evgenij Jur'EvichShchipanova Raisa SergeevnaLuneva Ol'Ga Nikolaevna

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Nauchno-Issledovatel'Skij Institut Khimicheskoj Tekhnologii"

METHOD OF URANIUM ORE PROCESSING Russian patent published in 2013 - IPC C22B60/02 C22B3/08 C22B3/26

Abstract RU 2481411 C1

FIELD: metallurgy.

SUBSTANCE: proposed process comprises crushing and grinding the ore, sulfuric acid leaching with addition of nitrogen acid as an oxidiser. Then, uranium is extracted and cleaned of impurities with the help of extractive agents mix to wash saturated extractive agent with the solution of sulfuric acid. After extraction, uranium is re-extracted to obtain uranium concentrate by means of 8-10%-solution of sodium carbonate. Uranium is deposited from re-extracted product by hydrogen peroxide with 50-100%-surplus from stoichiometry at equilibrium pH 3.6-4.2, mixing interval of 1- 1.5 h and sedimentation time of, at least, 1 h.

EFFECT: high quality finished uranium protoxide-oxide product.

4 tbl, 4 ex

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RU 2 481 411 C1

Authors

Akimova Irina Danilovna

Meshkov Evgenij Jur'Evich

Shchipanova Raisa Sergeevna

Luneva Ol'Ga Nikolaevna

Dates

2013-05-10—Published

2012-02-06—Filed