Processing of cobaltous sulphate/dithionate liquors derived from cobalt resource

A technology of cobalt hydrosulfate and sodium hydrosulfate, applied in the directions of thiosulfate/dithionite/polythionite, alkali metal sulfite/sulfite, cobalt oxide/cobalt hydroxide, etc. , which can solve problems such as incomprehensible

Pending Publication Date: 2022-01-14
ROCHER MANGANESE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although U.S. Patent No. 8,460,631 describes the processing of a liquor containing manganese sulfate and manganese dithionate and also containing sodium sulfate and sodium dithionite, it is not obvious from this invention how in the presence or absence of lithium sulfate and Sodium sulfate and sodium dithionate processed with cobalt sulfate and cobalt dithionate in case of lithium dithionate

Method used

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  • Processing of cobaltous sulphate/dithionate liquors derived from cobalt resource
  • Processing of cobaltous sulphate/dithionate liquors derived from cobalt resource
  • Processing of cobaltous sulphate/dithionate liquors derived from cobalt resource

Examples

Experimental program
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Effect test

Embodiment approach 1

[0036] For the first embodiment, refer to Figure 1-3 .

[0037] A liquor containing cobalt sulfate and cobalt dithionate is treated with sodium carbonate to form cobalt carbonate solids and a liquor containing sodium sulfate and sodium hydrosulfate.

[0038] Lithium sulfate and lithium dithionate, if present, will partially precipitate as lithium carbonate solids along with cobalt carbonate solids.

[0039] Cobalt carbonate-containing solids and lithium carbonate solids, if present, are removed from the carbonate-treated liquor by filtration or centrifugation.

[0040] The cobalt carbonate-containing solid and lithium carbonate solid (if present) are washed to remove soluble impurities and produce a clean material for reuse (eg, cathode material for lithium ion batteries).

[0041] The filtrate or centrate containing sodium sulfate and sodium hydrosulfate and the remainder of lithium sulfate and lithium hydrosulfate (if present) is treated with a crystallizer to crystallize ...

Embodiment approach 2

[0048] For the second embodiment, refer to Figure 4-6 .

[0049] Treating a liquor containing cobalt sulfate and cobalt hydrosulfate with sodium hydroxide to form cobalt hydroxide solids and a liquor containing sodium sulfate and sodium hydrosulfate;

[0050] removing solids containing cobalt hydroxide from the hydroxide-treated liquor by filtration or centrifugation;

[0051] washing cobalt hydroxide-containing solids to remove soluble impurities and produce clean materials for reuse (eg, cathode materials for lithium-ion batteries);

[0052] Adding sodium carbonate to the remaining solution precipitates some of the lithium (if present) as lithium carbonate;

[0053] removing lithium carbonate solids from the carbonate-treated liquor by filtration or centrifugation;

[0054] washing the lithium carbonate solids to remove soluble impurities and produce a clean material for reuse (eg, cathode material for lithium ion batteries);

[0055] The filtrate or centrate containing...

Embodiment approach 3

[0060] For the third embodiment, refer to Figure 7-9 .

[0061] treating a liquor containing cobalt sulfate and cobalt dithionate with lithium hydroxide to form cobalt hydroxide solids and a liquor containing lithium sulfate and lithium dithionate;

[0062] Lithium hydroxide can be produced by processing lithium carbonate recovered from previous operations of this flow diagram. Wietelmann et al. ("Lithium and Lithium Compounds", Ullmann's Encyclopedia of Industrial Chemistry, Wiley-VCH Verlag GmbH & Co, 2013, p. 24) describe a method for producing lithium hydroxide by reacting lithium carbonate with calcium hydroxide;

[0063] removing solids containing cobalt hydroxide from the hydroxide-treated liquor by filtration or centrifugation;

[0064] washing cobalt hydroxide-containing solids to remove soluble impurities and produce clean materials for reuse (eg, cathode materials for lithium-ion batteries);

[0065] Adding sodium carbonate to the remaining solution precipitates...

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Abstract

A process for water removal and / or recycling of sodium sulphate and / or sodium dithionate containing liquors derived from processing a cobalt resource derived from components of lithium ion batteries comprising steps of deriving from the cobalt resource a solution containing cobalt sulphate and cobalt dithionate, precipitation of cobalt as cobaltous carbonate or cobaltous hydroxide followed by removal thereof from the liquor, crystallization of sodium sulphate and sodium dithionate and removal of resulting crystals, followed by heating of the crystals to anhydrous sodium sulphate, sulphur dioxide and water and then separating the anhydrous sodium sulphate.

Description

[0001] This application is a continuation-in-part of co-pending application 15 / 806,183 and claims priority to provisional application 62 / 421,139, filed November 11, 2016. technical field [0002] The present invention relates to recovery of water and water from sulfate and dithionate containing liquors such as those obtained from hydrometallurgical processing of resource materials containing cobalt, such as cathode materials from lithium ion batteries Sulfates. Said cathode material from a Li-ion battery may be fully or partially bonded to metallic aluminum, and / or mixed with carbon and / or graphite (obtained from co-processing with the anode), and / or mixed with fluorine Compounds derived from co-processing with Li-ion battery electrolytes. Background technique [0003] It is generally known that cobalt can be leached from higher cobalt containing resource materials such as cobalt(III) trioxide using reducing agents such as sulfur dioxide together with sulfuric acid to produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54H01M10/0525C01G51/04C01G51/06C01G45/00C01G45/02C01G53/06C01G53/04C01D15/08C22B7/00C22B3/00C22B47/00C22B26/12C01F7/02C01F7/77
CPCC01B17/64C01G51/06C01G51/04C01D15/08C01D5/00C01G53/006Y02E60/10Y02W30/84C22B26/12C22B3/165C22B7/007H01M10/54C01G45/00C01F7/02C01G45/02H01M10/052C01G53/06C01G53/04C01F7/77
Inventor N.周J.C.郑A-M.纳库D.D.沃肯廷
Owner ROCHER MANGANESE INC
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