Method for comprehensively recovering rare earth elements and fluorine element in a bastnaesite treatment process

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United States of America Patent

PATENT NO 9752213
APP PUB NO 20150252449A1
SERIAL NO

14430268

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A method for comprehensively recovering rare earth elements and fluorine element in a bastnaesite treatment process. The method comprises: oxidation roasting a bastnaesite, and leaching a roasted mixture using a hydrochloric acid, adding a roasting promoter to the bastnaesite during the roasting process; and/or during the leaching process using the hydrochloric acid, adding a catalytic leaching promoter into the mixture, obtaining a rare earth chloride solution containing little cerium element and a cerium-rich residue containing the fluorine element; and separating and recovering rare earth fluorides from the cerium-rich residue.

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Patent Owner(s)

  • GRIREM ADVANCED MATERIALS CO., LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Cui, Dali Beijing, CN 6 14
Feng, Xingliang Beijing, CN 1 0
Huang, Xiaowei Beijing, CN 54 73
Long, Zhiqi Beijing, CN 6 14
Wang, Liangshi Beijing, CN 9 53
Xu, Yang Beijing, CN 501 4586
Yu, Ying Beijing, CN 77 476

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