METHOD FOR RECOVERING PHOSPHORUS AND RARE EARTH FROM RARE EARTH-CONTAINING PHOSPHATE ORE, AND SUBSTANCE CONTAINING RARE EARTH PHOSPHATE

WIPO Patent Application WO/2016/202257

A1

Provided are a method for recovering phosphorus and a rare earth from a rare earth-containing phosphate ore, and a substance containing a rare earth phosphate. The method comprises: step S1, leaching the rare earth phosphate ore by using a solution containing phosphoric acid, to obtain an acid-leached residue and a leachate; and step S2, subjecting the leachate to an ageing treatment so as to obtain a rare earth phosphate precipitate. The reaction temperature of step S2 is higher than the reaction temperature of step S1. The rare earth phosphate ore is acid leached by using a solution containing phosphoric acid at a relatively low reaction temperature, and then the leachate is subjected to an ageing treatment at a relatively high temperature, such that the rare earth ions form a rare earth phosphate precipitate, thereby achieving the efficient separation and recovery of the rare earth and phosphorus.

WANG LIANGSHI (CN)
HUANG XIAOWEI (CN)
ZHAO LONGSHENG (CN)
WU SHENGXI (CN)
YU YING (CN)
WANG CHUNMEI (CN)
CUI DALI (CN)
FENG ZONGYU (CN)
XU YANG (CN)
LONG ZHIQI (CN)

PCT/CN2016/085827

December 22, 2016

June 15, 2016

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GRIREM ADVANCED MAT CO LTD (CN)

C22B59/00; C22B3/06

WO2014018421A1

2014-01-30

CN102220488A	2011-10-19
CN1721559A	2006-01-18
CN103184356A	2013-07-03
CN105525092A	2016-04-27

KANGXIN PARTNERS,P.C. (CN)
北京康信知识产权代理有限责任公司 (CN)

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