Method for treating fluorine-containing rare earth mineral particles

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United States of America Patent

PATENT NO 11427884
APP PUB NO 20210062295A1
SERIAL NO

16630311

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Abstract

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A method for treating fluorine-containing rare earth mineral particles may include mixing a first batch of the fluorine-containing rare earth mineral particles with a first sulfuric acid solution in a weight ratio in the range of 2-10:1 of the sulfuric acid in the first sulfuric acid solution to the first batch of fluorine-containing rare earth mineral particles, and heating the mixture to cause a liquid-solid reaction. The solid phase and liquid phase may be separated after the reaction to obtain an acid filtrate and an acid residue. The acid residue may be leached with water to obtain an aqueous leaching liquor that comprises a rare earth sulfate and an aqueous leaching residue. A second sulfuric acid solution may be added to the acid filtrate in an amount such that the sulfuric acid concentration of the acid filtrate is 40-85 wt %.

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Patent Owner(s)

  • NATIONAL ENGINEERING RESEARCH CENTRE OF RUIKE RARE EARTH METALLURGY AND FUNCTION MATERIALS CO., LTD.; BAOTOU RESEARCH INSTITUTE OF RARE EARTHS

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Cui, Jianguo Baotou, CN 3 12
Gao, Ting Baotou, CN 68 717
Hao, Xiaoli Baotou, CN 1 0
Hou, Ruien Baotou, CN 1 0
Li, Bo Baotou, CN 692 4315
Li, Dong Baotou, CN 542 7794
Wang, Zhe Baotou, CN 457 4373
Xu, Meng Baotou, CN 151 1393
Zhang, Yang Baotou, CN 789 4132

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