公开(公告)号：US06835228B1

公开(公告)日：2004-12-28

申请号：US10715356

申请日：2003-11-19

Applicant: Jiunn-Ren Lin ,  I-Long Chang ,  Yu-Lin Jiang ,  Jer-Yuan Shiu

Inventor： Jiunn-Ren Lin ,  I-Long Chang ,  Yu-Lin Jiang ,  Jer-Yuan Shiu

IPC: C25C108

CPC classification number: C22B3/0005 ,  C22B7/001 ,  C22B7/007 ,  C22B17/04 ,  C22B23/0453 ,  H01M10/052 ,  H01M10/30 ,  H01M10/54 ,  Y02P10/214 ,  Y02P10/234 ,  Y02W30/84

Abstract: A process of recovering metals from waste lithium ion/Ni—H/Ni—Cd batteries, wherein the waste batteries are calcined and sieved to generate an ash containing metals and metal oxides. The process includes subjecting the ash to a first dissolution etching treatment, a first filtration treatment to obtain a filtrate containing Cd ions which are crystallized as cadmium sulfate, a second dissolution etching treatment for the filtered solid, and a second filtration treatment to obtain a second filtrate. Fe+3, Al+3 and rare earth metal ions in the second filtrate are precipitated as hydroxides by adding a base to the second filtrate. The remaining solution was extracted and counter-extracted to obtain aqueous solutions of Co and Ni ions, which were subjected separately to a electrolysis to deposit Co and Ni metals. Li ions in the residue solution from the electrolysis of Ni was precipitated as carbonate by adding a soluble carbonate salt.

Abstract translation: 从废锂离子/ Ni-H / Ni-Cd电池回收金属的方法，其中废电池被煅烧和筛分以产生含金属和金属氧化物的灰分。 该方法包括对灰进行第一次溶蚀蚀刻处理，进行第一次过滤处理以获得含有硫酸镉结晶的Cd离子的滤液，对过滤的固体进行第二次溶解蚀刻处理，并进行第二次过滤处理，得到第二次 滤液。 通过向第二滤液中加入碱将第二滤液中的Fe 3+，Al 3+和稀土金属离子作为氢氧化物沉淀。 提取剩余溶液并反萃取，得到Co和Ni离子的水溶液，分别进行电解沉积Co和Ni金属。 通过加入可溶性碳酸盐，使来自电解Ni的残渣溶液中的Li离子作为碳酸盐析出。

公开(公告)号：US06764584B2

公开(公告)日：2004-07-20

申请号：US10274956

申请日：2002-10-22

Applicant: I-Long Chang ,  Yu-Lin Jiang ,  Jer-Yuan Shiu ,  Jiunn-Ren Lin

Inventor： I-Long Chang ,  Yu-Lin Jiang ,  Jer-Yuan Shiu ,  Jiunn-Ren Lin

IPC: B01D6144

CPC classification number: B01J20/2803 ,  B01D61/44 ,  B01J20/06 ,  C01D15/00

Abstract: Two concentration techniques, adsorption and electrodialysis, are combined to enrich lithium ions in brine from a level of several ppm to about 1.5%. At beginning brine is subjected to an adsorption, so that Li content is increased to 1200-1500 ppm, followed by two stages of electrodialysis in series to increase Li ions to about 1.5%. Li depleted solution from the second stage of electrodialysis having a Li content of 1200-1500 ppm is recycled to the first stage of electrodialysis as a feed. Li depleted water from the first stage of electrodialysis is subjected to a residue recovery electrodialysis to form a Li enriched solution of 1200-1500 ppm, which is also recycled to the first stage of electrodialysis as a feed. Li depleted solution from the residue recovery electrodialysis is recycled as a feed of the adsorption, so as to sufficiently recover Li ions from brine.