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Title:
METHOD FOR RECOVERING PHOSPHORUS AND RARE EARTH FROM RARE EARTH-CONTAINING PHOSPHATE ORE, AND SUBSTANCE CONTAINING RARE EARTH PHOSPHATE
Document Type and Number:
WIPO Patent Application WO/2016/202257
Kind Code:
A1
Abstract:
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.

Inventors:
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)
Application Number:
CN2016/085827
Publication Date:
December 22, 2016
Filing Date:
June 15, 2016
Export Citation:
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Assignee:
GRIREM ADVANCED MAT CO LTD (CN)
International Classes:
C22B3/06; C22B59/00
Domestic Patent References:
WO2014018421A12014-01-30
Foreign References:
CN102220488A2011-10-19
CN1721559A2006-01-18
CN103184356A2013-07-03
CN105525092A2016-04-27
Attorney, Agent or Firm:
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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