A system and method for separation and purification of dissolved rare earth/precious metals elements/compounds

a rare earth/precious metals element and purification technology, applied in the direction of semi-permeable membranes, material analysis by electric/magnetic means, electrolysis components, etc., can solve the problems of wasting a great deal of time, resources and expertise in separating and extracting single rees, and requiring a large amount of time, resources and expertis

Inactive Publication Date: 2016-05-19
INNORD
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  • Abstract
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  • Claims
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Benefits of technology

[0010]Other objects, advantages and features of the present invention will become more apparent upon reading of the following non

Problems solved by technology

However, producing individual REE from mixed REs compounds is tremendously tedious.
Separating and extracting a single REE requires a great deal of time, resources and expertise.
Today, an advanced RE refinery facility cost hundreds of millions of dollars to build.
Although there are se

Method used

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  • A system and method for separation and purification of dissolved rare earth/precious metals elements/compounds
  • A system and method for separation and purification of dissolved rare earth/precious metals elements/compounds
  • A system and method for separation and purification of dissolved rare earth/precious metals elements/compounds

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Embodiment Construction

[0025]The present method and system use electrophoretic mobility variation of REE or precious metals in an electrical field to separate them, thereby reducing the cost of separation and circumventing intrinsic environmental issues of solvent based methods and systems. At the purification stage, the present method and system remove impurities and separate REE / precious metal elements simultaneously. The present method and system will be hereinafter described in relation to REE.

[0026]Free flow electrophoresis (FFE) is used to fractionate REE ions, using a uniform electric field applied perpendicular to a solution flow and separating the mobile ions based on electrophoretic mobility (Ui).

[0027]Basically, in a FFE system, the translational flow of ions in a laminar flow regime along a channel is affected by a perpendicular electrophoretic force exerted by a static electric field on each ion. The magnitude of this force and hence the deviation of the ions form straight trajectories along ...

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Abstract

A method for purification and separation of mixed elements, comprising at least a first free flow electrophoresis separation chamber, wherein a solution of the mixed elements is passed through the first separation chamber, an electric field submitted perpendicular to the solution flow and separating mobile ions of the solution based on electrophoretic mobility. A continuous method comprises selecting a complexing ligand, and controlling the temperature and pH of the solution. Also, a system or method for separating components of a multi-component concentrate comprising directing solution to at least a first and second channel each receiving part of the solution; each channel comprising a concentration section comprising a first transverse electric field across the channel, a fractionation section comprising a second electric field in a direction opposite the first electric field thereby distributing ions of the solution across the channel, and a flow splitter at an output of the fractionation section that divides the flow of each channel into subflows concentrated in heavier elements and concentrated in lighter elements.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a system and a method to separate and refine rare earth / precious metals elements / compounds. More precisely, the present invention relates to a system and method for binary or multicomponent fractional separation and purification of dissolved rare earth / precious metals elements / compounds produced in hydrometallurgical processes while they are dissolved in an acidic or weakly basic medium, without any intermediate precipitation step.BACKGROUND OF THE INVENTION[0002]Rare earth elements (REE) occur together in nature, and any given mineral contains several or most of them. Production of high purity individual rare earth (RE) elements / compounds from their ores generally requires two stages of processing, including mineral processing and hydrometallurgy.[0003]Mineral processing and hydrometallurgy processing of the ore before REE purification is relatively simple and quite achievable though conventional methods. However, produci...

Claims

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Application Information

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IPC IPC(8): C22B59/00C22B3/20
CPCC22B3/20C22B59/00C22B11/04Y02P10/20
Inventor HAJIANI, POUYA
Owner INNORD
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