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Title:
A METHOD FOR EXTRACTING NI AND CO FROM LATERITE USING HYDROCHLORIC ACID
Document Type and Number:
WIPO Patent Application WO/2009/100602
Kind Code:
A1
Abstract:
A method for extracting Ni and Co from laterite using hydrochloric acid comprises: mining, preparing ore, leaching ore, separating, recovering leach residues, precipitating Ni from leach solution, calcining, and regenerating and recycling hydrochloric acid. The method extracts intermediate product containing Ni and Co, recovers, regenerates and recycles hydrochloric acid, and recovers washing liquor for recycle. The method could extract Ni and Co at a high leaching velocity and high leaching efficiency without emission and contamination, and could further obtain Fe and Mg etc. In addition, the method is simple in process and low in cost.

Inventors:
CAO GUOHUA (CN)
Application Number:
PCT/CN2008/000964
Publication Date:
August 20, 2009
Filing Date:
May 19, 2008
Export Citation:
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Assignee:
CAO GUOHUA (CN)
International Classes:
C22B3/10; C22B3/04; C22B23/00
Domestic Patent References:
WO2007074360A22007-07-05
WO2002038819A22002-05-16
Foreign References:
CN1718787A2006-01-11
CN1736883A2006-02-22
JPH09143588A1997-06-03
CN1823172A2006-08-23
CN1040417C1998-10-28
CN1382227A2002-11-27
EP1412544B12006-01-11
Other References:
QIAN G.: "Recovering Cr from Laterite Contaning Ni and Co and Leach Residues of Laterite", MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES, 1984, pages 77 - 81
LIN X.: "Evaluation of Used Hydrochloric Acid Regeneration Processes", ENVIRONMENTAL PROTECTION OF CHEMICAL INDUSTRY, vol. 18, no. 4, 1998, pages 208 - 214
Attorney, Agent or Firm:
BEIJING ZHONGYUAN HUAHE INTELLECTUAL PROPERTY AGENCY CO., LTD. (Huibin BuildingNo.8 Beichendong Street,Chaoyang District, Beijing 1, CN)
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