METHOD FOR RECOVERY RARE-EARTH ELEMENTS OF APATITE Russian patent published in 1995 - IPC

Abstract RU 2049727 C1

FIELD: processing apatite. SUBSTANCE: apatite is treated by nitric acid, precipitate being isolated. Thus obtained nitric-phosphoric acid solution is neutralized to pH 0.8-1.2 with the help of ammonia. Precipitate which contains rare-earth elements is isolated of solution. Said solution is neutralized to pH 2.0. Thus obtained precipitate is added into nitric-phosphoric acid solution. EFFECT: improves efficiency of method. 1 tbl

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Authors

Bolkov Aleksandr Fedorovich[Ua]

Gritsaeva Antonina Mikhajlovna[Ua]

Okhapkin Aleksandr Grigor'Evich[Ua]

Silkina Alla Iosifovna[Ua]

Chuprinko Vitalij Georgievich[Ua]

Spitsin Vladimir Aleksandrovich[Ua]

Lomazov Vladimir Semenovich[Ua]

Zagoskin Aleksandr Mikhajlovich[Ua]

Dates

1995-12-10Published

1991-09-16Filed