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WO2003070993A1 - Dispositif et procede d'extraction au solvant - Google Patents

Dispositif et procede d'extraction au solvant Download PDF

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Publication number
WO2003070993A1
WO2003070993A1 PCT/AU2003/000228 AU0300228W WO03070993A1 WO 2003070993 A1 WO2003070993 A1 WO 2003070993A1 AU 0300228 W AU0300228 W AU 0300228W WO 03070993 A1 WO03070993 A1 WO 03070993A1
Authority
WO
WIPO (PCT)
Prior art keywords
aqueous solution
metal species
particles
extraction
organic liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/AU2003/000228
Other languages
English (en)
Inventor
Peter Robert Hutchison
Christopher John Browne
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
UMATILLA RESOURCES Pty Ltd
Original Assignee
UMATILLA RESOURCES Pty Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by UMATILLA RESOURCES Pty Ltd filed Critical UMATILLA RESOURCES Pty Ltd
Priority to AU2003247269A priority Critical patent/AU2003247269A1/en
Publication of WO2003070993A1 publication Critical patent/WO2003070993A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
    • C22B3/02—Apparatus therefor
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
    • C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
    • C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Definitions

  • the present invention relates to a device and a process for the extraction and/or purification of metal containing species, using a solvent extraction technique.
  • the invention is particularly directed to a device and process which utilise absorbent particles in the solvent extraction process.
  • Figure 1 illustrates a typical conventional solvent extraction circuit comprising two extraction stages and two strip stages, together with a scrub stage. Each stage consists of one or more mixers in series with a settler.
  • an aqueous leach liquor containing dissolved metal ions including the primary target metal from the leaching of a mineral ore or concentrate using a chemical lixiviant is contacted in a mixer with an organic liquid comprising an organic extractant dissolved in a diluent such as kerosene.
  • the extractant is designed to be selective in extracting the target metal from the aqueous leach liquor. This results in the extraction of the target metal from the aqueous leach liquor into the organic phase, leaving a raffinate solution.
  • the mixture of aqueous and organic phases are allowed to separate in a settler.
  • the organic phase containing the target metal is then pumped to the next stage, and the raffinate which contains the chemical lixiviant (as well as any other potentially valuable metal ions), is recycled to the leaching process.
  • the target metal now contained in the organic phase is contacted in another mixer with a pure aqueous chemical lixiviant (such as dilute sulphuric acid in the case of copper processing) to extract the target metal back into this aqueous phase in a purified form.
  • the metal containing aqueous phase is then transferred directly to an electrowinning stage for the electrolytic recovery of the pure metal.
  • the organic phase is then recycled to the first stage for contacting with fresh leach liquor.
  • a number of solvent extraction plants are commercially available and incorporate various technologies for ensuring adequate mixing, phase disengagement and for the provision of low extractant entrainment. Selection of an appropriate mixer settler is dependant on a number of issues including the type of metal being extracted, influence of the suspended solids and the site topography and climate.
  • lids can be quite high depending on the size and type of the settler.
  • the efficiency of metal transfer in each stage is about 90% for each extraction stage and about 95% for each strip stage.
  • the stage efficiency can be improved, such as by use of multiple mixers instead of single mixers, or by increasing the retention time in each mixer.
  • the present invention provides a device for use in a solvent extraction process for the selective extraction of a metal species from an aqueous solution containing said metal species, said device including a container for receiving said aqueous solution and containing absorbent particles having absorbed therein a reagent for extraction of said metal species.
  • the present invention also contemplates a process for the selective extraction of a metal species from an aqueous solution containing said metal species, said process including the steps of: (i) impregnating absorbent particles with a reagent for the selective extraction of said metal species from said aqueous solution; (ii) contacting the impregnated absorbent particles with the aqueous solution containing said metal species, whereby said reagent selectively extracts said metal species from said aqueous solution into said impregnated particles; and (iii) contacting said particles containing said metal species with a stripping solution in order to recover the metal species therefrom and into said stripping solution.
  • the inventive device is typically a highly permeable column containing particles of an absorbent material.
  • the column can be of any shape, such as a vertical or horizontal tank of narrow or wide dimensions or, a straight or coiled piping or tubing.
  • the absorbent particles are of an appropriate size, however, these are preferably 1mm in size or greater.
  • the absorbent particles are typically particles having a relatively high surface area and comprise a material which is not chemically reactive with other species in the process.
  • suitable absorbents include ceramic powders (e.g. silica, titania, clays) or carbon.
  • the absorbent particles include or consist of activated carbon.
  • the device of the invention typically includes an inlet through which the metal species containing aqueous solution is admitted and an outlet through which the raffinate solution exits after extraction of the metal species.
  • One or both of the inlet and outlet may comprise an opening in the housing of the device having a screen thereacross with a mesh size small enough to prevent the escape of absorbent particles.
  • the inlet is located towards the top of the column and the outlet is located towards the bottom, so that the metal species containing aqueous solution flows downwardly from the inlet to the outlet under the influence of gravity.
  • this configuration may be reversed to suit particular circumstances.
  • the absorbent particles are impregnated with a reagent which has the property of preferentially extracting the metal containing species from the aqueous solution when it is passed through the column.
  • the reagent is typically an organic liquid.
  • Organic liquids used in conventional solvent extraction techniques are suitable.
  • Examples of organic extractant reagents which are suitable for extraction of copper containing species from leach liquors include those based upon hydroxy oximes which include the two classes ketoximes and aldoximes. Ketoximes were first generation extractants based upon formulations of 2-hydroxybenzophenone oxime or 2-hydroxy-5 nonyl acetophenone and include those extractants marketed under the trade name LIX84 (Cognis).
  • Aldoximes are second generation extractants developed to overcome the short comings of the ketoximes. They are stronger extractants than ketoximes and typically must be combined with an equilibrium modifier or a ketoxime so that they can be efficiently stripped.
  • Aldoximes may be based on 5-nonyl benzaldoxime, either alone or in combination with a modifier or a ketoxime.
  • the modifier may be nonylphenol (as in the reagent available under the trade name Acorga P5100 and P5300 by Acorga Ltd.), an aliphatic alcohol such as tridecanol or an ester, such as in the reagent available under the trade name Acorga M-5640 by Acorga Ltd.
  • aldoxime-ketoxime reagent is that marketed under the trade name LIX984 (Cognis).
  • extractants include a mixture of ⁇ hydroxybenzophenone oxime and ⁇ hydroxy oxime, available under the trade name LIX64N produced by General Mills Chemicals, Inc.
  • Another suitable reagent is an alkyl ⁇ hydroxy quinoline based reagent, such as that sold under the trade name Kelex 100, by Ashland Chemical Co, or Kelex 120, the latter of which is a mixture of Kelex 100 and nonyl phenol.
  • Another suitable extractant is one based on an aryl alkylbetadiketone, such as that sold by Henkel Corporation under the trade name LIX 54-100.
  • the absorbent particles are contacted with the extractive reagent which is absorbed into the particles.
  • the particles may absorb up to their equivalent weight, or volume, of reagent. However, typically, the maximum absorption level is around 60%.
  • the device and process of the invention can be used to extract target metal containing species from aqueous solutions, such as from pregnant leach liquors resulting from mineral processing using hydrometallurgical processes.
  • the process can be applied to the extraction of all metal ions capable of forming stable salt solutions, particularly the transition metal ions. It is particularly applicable to extraction of metals which are capable of being extracted using conventional solvent extraction techniques. Examples are the base metals, i.e. copper, lead and zinc, although the process may be extended to extraction of transition metals and/or precious metals.
  • the process and device are especially applicable to extraction of copper.
  • the device and process of the invention can also be used for multiple stage extractions of one or more secondary target metal ions contained in the raffinate derived from the first stage extraction.
  • the metal containing aqueous solution is passed through the device of the invention, preferably under pressure such as pressure exerted by a feed pump, and the extractive reagent absorbed into the absorbent particles selectively extracts the metal species from the aqueous solution. Preferably, this proceeds until the extractive reagent is saturated with the metal species, at which stage the flow of aqueous solution into the device is terminated.
  • the device is then typically washed with water, or a dilute aqueous process solution, and then removed from the voids of the column. This de-entrainment step is preferably effected by air blowing.
  • the container or column of metal and extractive reagent impregnated absorbent is subsequently irrigated by passing a stripping solution therethrough, preferably under pressure.
  • the stripping solution should be one capable of recovering the target metal from the extractive reagent.
  • the stripping process is preferably continued until all of the target metal is released from the extractive reagent with the stripping solution.
  • the target metal is now present in the stripping solution in a purified form. It can subsequently be utilised as a feed solution to a conventional electrowinning process in order to produce pure metal, or to a chemical process to produce a high grade chemical product.
  • the invention will become more readily apparent from the following exemplary description in connection with the Example and accompanying drawings. DESCRIPTION OF DRAWINGS
  • Figure 1 is a schematic flow diagram of a typical conventional solvent extractant circuit.
  • FIG. 2 is a flow diagram showing the general features of the process of the invention.
  • Figure 3 is a more detailed flow diagram of the process of the invention.
  • Figure 4(a) is a flow diagram showing details of the feed cycle of the process of the invention.
  • Figure 4(b) is a flow diagram showing details of the strip cycle of the process of the invention.
  • Figure 4(c) is a flow diagram showing details of the crystallising cycle of the process of the invention.
  • Figure 4(d) is a flow diagram showing details of the make-up cycle of the process of the invention.
  • EXAMPLE An absorption column constructed from PVC water pipe of 50L volume was supported on a frame and was connected to a piping arrangement as illustrated schematically in Figure 3. The detail of the individual feed, strip, crystallising and make-up cycles of the arrangement is illustrated schematically in Figures 4(a), (b), (c) and (d) respectively. 25kg of an activated carbon was contacted with copper-specific organic extractant and charged to the column. The activated carbon had a bulk density of 0.53 gem "3 and a void factor of 30%. The column was then flushed with water until extractant was not visible in the elutriate.
  • the strip cycle is illustrated in Figure 4(b).
  • the column was fed with 15 litres of a strip solution containing 60 g/l Cu (as CuSO 4 ) and 1.0kg concentrated (98%) H 2 SO 4 and heated to 45°C.
  • a residence period of 2 minutes was observed after which the column was flushed forward with wash water with the first half going to the strip circuit and the second half going to the pregnant liquor storage tank.
  • the liquor trapped in the column void was blown with air back to the pregnant liquor storage tank (see Figure 3).
  • the resultant liquor from the first half of the strip contained 104.4 g/l Cu and had a temperature of 40°C. This liquor was cooled to 26°C in an agitated tank with a cooling coil, and the resultant slurry was filtered and dried to recover the purified copper sulphate pentahydrate crystals.
  • the crystallising cycle is illustrated in Figure 4(c).
  • the separated mother liquor contained 60 g/l copper.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

L'invention porte sur un dispositif utilisable dans un processus d'extraction au solvant et servant à l'extraction sélective de substances métalliques d'une solution aqueuse les contenant. Le dispositif comprend un récipient recevant la solution aqueuse ainsi que des particules absorbantes ayant absorbé un réactif d'extraction desdites substances métalliques.
PCT/AU2003/000228 2002-02-25 2003-02-24 Dispositif et procede d'extraction au solvant Ceased WO2003070993A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003247269A AU2003247269A1 (en) 2002-02-25 2003-02-24 Device and process for solvent extraction

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPS0749 2002-02-25
AUPS0749A AUPS074902A0 (en) 2002-02-25 2002-02-25 Device and process for solvent extraction

Publications (1)

Publication Number Publication Date
WO2003070993A1 true WO2003070993A1 (fr) 2003-08-28

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PCT/AU2003/000228 Ceased WO2003070993A1 (fr) 2002-02-25 2003-02-24 Dispositif et procede d'extraction au solvant

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AU (1) AUPS074902A0 (fr)
WO (1) WO2003070993A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006029444A1 (fr) * 2004-09-17 2006-03-23 Gekko Systems Pty Ltd Appareil de separation
WO2017070102A1 (fr) * 2015-10-19 2017-04-27 Basf Se Procédés et systèmes d'élimination de composés polaires présents dans une solution contenant un ou plusieurs métaux
CN109628748A (zh) * 2019-01-18 2019-04-16 成都虹华环保科技股份有限公司 蚀刻液的萃取电积装置和萃取电积方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114427043B (zh) * 2022-02-07 2023-02-03 江苏南方永磁科技有限公司 一种稀土元素的萃取分离用稀土料液高效自动除杂装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4261737A (en) * 1979-10-31 1981-04-14 Uop Inc. Recovery of cobalt values
AU4041585A (en) * 1984-03-29 1985-10-03 Anglo American Corporation Of South Africa Limited Metal recovery from activated carbon support
SU1669994A1 (ru) * 1988-10-10 1991-08-15 Институт Физической Химии Им.Л.В.Писаржевского Способ извлечени золота и серебра из цианистых растворов, содержащих цветные металлы
EP0826784B1 (fr) * 1996-08-26 2000-07-12 Kawasaki Kasei Chemicals Ltd. Support de charbon imprégné d'antrahydroquinone et de métal pour le traitement d'ions complexés de métaux précieux dissous en solution aqueuse
CA2245101C (fr) * 1998-08-18 2002-11-05 Edward Ramsay Procede d'extraction de l'or

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4261737A (en) * 1979-10-31 1981-04-14 Uop Inc. Recovery of cobalt values
AU4041585A (en) * 1984-03-29 1985-10-03 Anglo American Corporation Of South Africa Limited Metal recovery from activated carbon support
SU1669994A1 (ru) * 1988-10-10 1991-08-15 Институт Физической Химии Им.Л.В.Писаржевского Способ извлечени золота и серебра из цианистых растворов, содержащих цветные металлы
EP0826784B1 (fr) * 1996-08-26 2000-07-12 Kawasaki Kasei Chemicals Ltd. Support de charbon imprégné d'antrahydroquinone et de métal pour le traitement d'ions complexés de métaux précieux dissous en solution aqueuse
CA2245101C (fr) * 1998-08-18 2002-11-05 Edward Ramsay Procede d'extraction de l'or

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Derwent World Patents Index; Class E32, AN 1992-247979/30 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006029444A1 (fr) * 2004-09-17 2006-03-23 Gekko Systems Pty Ltd Appareil de separation
US7909992B2 (en) 2004-09-17 2011-03-22 Gekko Systems Pty Ltd. Separation apparatus
WO2017070102A1 (fr) * 2015-10-19 2017-04-27 Basf Se Procédés et systèmes d'élimination de composés polaires présents dans une solution contenant un ou plusieurs métaux
CN109628748A (zh) * 2019-01-18 2019-04-16 成都虹华环保科技股份有限公司 蚀刻液的萃取电积装置和萃取电积方法
CN109628748B (zh) * 2019-01-18 2020-11-20 成都虹华环保科技股份有限公司 蚀刻液的萃取电积装置和萃取电积方法

Also Published As

Publication number Publication date
AUPS074902A0 (en) 2002-03-21

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