Liquid-liquid extraction unit, multistage liquid-liquid extraction apparatus using the unit, and multistage continuous extraction system for rare earth elements

a multi-stage liquid-liquid extraction and rare earth element technology, which is applied in the field of liquid-liquid extraction units, multi-stage liquid-liquid extraction apparatuses using the unit, and multi-stage continuous extraction systems for rare earth elements, can solve the problems of mixer-settler, loss of processing efficiency, and reaction cannot catch up at a high flow rate equivalent to the flow rate available, so as to achieve sufficient extraction efficiency and reduce the footprint , the effect of small siz
US20130183208A1Inactive Publication Date: 2013-07-18SHIN ETSU CHEM IND CO LTD
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
SHIN ETSU CHEM IND CO LTD
Publication Date
2013-07-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

A liquid-liquid extraction unit includes an extraction / separation tank (10) into which an aqueous phase in bubble form is admitted from an upper inlet (20) in one sidewall and an organic phase in bubble form is admitted from a lower inlet (30) in the one sidewall. The upward moving organic phase is contacted with the downward moving aqueous phase. After contact, the organic phase is discharged through an upper outlet (40) in an opposite sidewall and the aqueous phase is discharged through a lower outlet (50) in the opposite sidewall.
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Description

CROSS-REFERENCE TO RELATED APPLICATION

[0001] This non-provisional application claims priority under 35 U.S.C. §119(a) on Patent Application No. 2012-005224 filed in Japan on Jan. 13, 2012, the entire contents of which are hereby incorporated by reference.TECHNICAL FIELD

[0002] This invention relates to a liquid-liquid extraction unit adapted to contact an aqueous phase with an organic phase, separate them, and recover the desired extract from the thus separated aqueous phase and / or organic phase, more particularly, to a liquid-liquid extraction unit suitable for the extraction and separation of rare earth elements, especially rare earth elements including yttrium and light rare earth elements (La, Ce, Pr, Nd, Sm, and Eu); a multistage liquid-liquid extraction apparatus and a multistage continuous extraction system using the unit.BACKGROUND ART

[0003] Nowadays, rare earth magnets as typified by Nd magnets are widely used in motors, sensors and other parts built in hard disk drives, air co...

Claims

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