CA2480865A1 - Acid beneficiation of ore - Google Patents

Acid beneficiation of ore Download PDF

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Publication number
CA2480865A1
CA2480865A1 CA002480865A CA2480865A CA2480865A1 CA 2480865 A1 CA2480865 A1 CA 2480865A1 CA 002480865 A CA002480865 A CA 002480865A CA 2480865 A CA2480865 A CA 2480865A CA 2480865 A1 CA2480865 A1 CA 2480865A1
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CA
Canada
Prior art keywords
process according
iron
ore
titaniferous ore
pretreated
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Granted
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CA002480865A
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French (fr)
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CA2480865C (en
Inventor
Smith Earl
Michael Robinson
Talati Kirit
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Tronox LLC
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Application filed by Individual filed Critical Individual
Publication of CA2480865A1 publication Critical patent/CA2480865A1/en
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Publication of CA2480865C publication Critical patent/CA2480865C/en
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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
    • C22B34/00—Obtaining refractory metals
    • C22B34/10—Obtaining titanium, zirconium or hafnium
    • C22B34/12—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08
    • C22B34/1236—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 obtaining titanium or titanium compounds from ores or scrap by wet processes, e.g. by leaching
    • C22B34/124—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 obtaining titanium or titanium compounds from ores or scrap by wet processes, e.g. by leaching using acidic solutions or liquors
    • C22B34/125—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 obtaining titanium or titanium compounds from ores or scrap by wet processes, e.g. by leaching using acidic solutions or liquors containing a sulfur ion as active agent
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G23/00—Compounds of titanium
    • C01G23/04—Oxides; Hydroxides
    • C01G23/047—Titanium dioxide
    • C01G23/053—Producing by wet processes, e.g. hydrolysing titanium salts
    • C01G23/0532—Producing by wet processes, e.g. hydrolysing titanium salts by hydrolysing sulfate-containing salts
    • 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
    • C22B19/00—Obtaining zinc or zinc oxide
    • C22B19/20—Obtaining zinc otherwise than by distilling
    • 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
    • C22B34/00—Obtaining refractory metals
    • C22B34/10—Obtaining titanium, zirconium or hafnium
    • C22B34/12—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08
    • C22B34/1204—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 preliminary treatment of ores or scrap to eliminate non- titanium constituents, e.g. iron, without attacking the titanium constituent
    • C22B34/1213—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 preliminary treatment of ores or scrap to eliminate non- titanium constituents, e.g. iron, without attacking the titanium constituent by wet processes, e.g. using leaching methods or flotation techniques
    • 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

Abstract

Processes for the efficient and economical beneficiation of titaniferous ore are provided. A unique process for beneficiating ore comprising pretreatment of the ore by oxidation and reduction, followed by acid leaching with sulfur ic acid has been developed. The acid used in this process may be recycled, whic h will thereby increase the efficiency of the process. Preferably the ore treated according to the present invention is ilmenite ore.

Claims (32)

1. A process for snaking a TiO2 product comprising:
a. leaching a pretreated titaniferous ore with sulfuric acid to form a liquid phase and an undissolved titanium oxide phase, wherein said pretreated titaniferous ore is comprised of iron and substantially all of the iron is ferrous iron and said pretreated ore is obtained by oxidizing and reducing a titaniferous ore; and b. separating a TiO2 product from said undissolved titanium oxide phase.
2. The process according to claim 1, wherein said titaniferous ore is ilmenite ore.
3. The process according to claim 1, wherein said oxidizing occurs at a temperature of from about 800°C to about 1150°C.
4. The process according to claim 1, wherein said oxidizing of said titaniferous ore results in the formation of pseudobrookite.
5. The process according to claim 1, wherein said reducing occurs at a temperature of from about 800°C to about 1000°C.
6. The process according to claim 1, wherein less than about 1% of the iron is metallic iron.
7. The process according to claim 1, wherein said sulfuric acid is in a concentration of from about 5% to about 50%.
8. The process according to claim 1, wherein said leaching occurs between the temperatures of 110°C and 200°C.
9. A process for producing TiO2 feedstock comprising calcining the TiO2 product of claim 1 to produce a TiO2 feedstock.
10. A process for making a TiO2 product comprising:
a. leaching a pretreated titaniferous ore with sulfuric acid to form a liquid phase and an undissolved titanium oxide phase, wherein said pretreated titaniferous ore is comprised of iron and substantially all of the iron is ferrous iron, and wherein said liquid phase is comprised of fines; and b. separating a TiO2 product from said fines.
11. The process according to claim 9, wherein said pretreated ore is obtained by oxidizing and reducing a titaniferous ore.
12. The process according to claim 9, wherein said titaniferous ore is ilmenite ore.
13. The process according to claim 10, wherein said oxidizing occurs at a temperature of from about 800°C to about 1150°C.
14. The process according to claim 10, wherein said oxidizing of said titaniferous ore results in the formation of pseudobrookite.
15. The process according to claim 10, wherein said reducing occurs at a temperature of from about 800°C to about 1000°C.
16. The process according to claim 9, wherein less than about 1% of the iron is metallic iron.
17. The process according to claim 9, wherein said sulfuric acid is in a concentration of from about 5% to about 50%.
18. The process according to claim 10, wherein said leaching occurs between the temperatures of 110°C and 200°C.
19. The process according to claim 9, wherein said fines comprise titanium dioxide or titanium hydrolysate.
20. The process according to claim 17, wherein said fines further comprise iron sulfate.
21. The process according to claim 18, wherein said separating further comprises a. re-slurrying and dissolving said iron sulfate to form dissolved iron sulfate; and b. filtering said dissolved iron sulfate to form a titanium dioxide or titanium hydrolysate product.
22. The process according to claim 19, wherein said re-slurrying and dissolving is performed in the presence of acid.
23. A process for making a first TiO2 product and second TiO2 product comprising:
a. leaching pretreated titaniferous ore with sulfuric acid to form a liquid phase and an undissolved titanium oxide phase, wherein said pretreated titaniferous ore is comprised of iron and substantially all of the iron is ferrous iron;
b. separating a first TiO2 product from said undissolved titanium oxide phase; and c. separating a second TiO2 product from said liquid phase.
24. A process for recycling acid during the production of a TiO2 product, the process comprising the steps of:
a. treating a first titaniferous ore with a leaching agent to form a liquid phase and a coarse particle phase, wherein said liquid phase comprises dissolved iron salts;
b. separating the liquid phase from the coarse particle phase;

c. crystallizing and removing said dissolved iron salts from said liquid phase to yield a residual acid; and d. recycling said residual acid to treat a second titaniferous ore.
25. The process according to claim 22, wherein said first titaniferous ore and said second titaniferous ore are both ilmenite.
26. The process according to claim 22 further comprising pretreating said first titaniferous ore prior to treating said first titaniferous ore with said leaching agent, wherein said pretreating forms a pretreated ore that is comprised of iron and substantially all of the iron is ferrous iron.
27. The process according to claim 22, wherein said leaching agent is sulfuric acid.
28. The process according to claim 22, wherein said crystallizing and removing is accomplished by vacuum crystallization.
29. The process according to claim 22, wherein said crystallizing and removing is accomplished by cooling crystallization.
30. The process according to claim 22, wherein said crystallizing and removing is accomplished by adding virgin or high concentration waste acid.
31. The process according to claim 22, wherein during said crystallizing and removing, iron sulfate monohydrate or tetrahydrate are added.
32. The process according to claim 22 further comprising evaporating and reconcentrating said residual acid.
CA2480865A 2002-04-19 2003-04-15 Acid beneficiation of ore Expired - Lifetime CA2480865C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/126,241 US7008602B2 (en) 2002-04-19 2002-04-19 Beneficiation of titaniferous ore with sulfuric acid
US10/126,241 2002-04-19
PCT/US2003/012656 WO2003089674A2 (en) 2002-04-19 2003-04-15 Acid beneficiation of ore

Publications (2)

Publication Number Publication Date
CA2480865A1 true CA2480865A1 (en) 2003-10-30
CA2480865C CA2480865C (en) 2011-07-26

Family

ID=29214980

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2480865A Expired - Lifetime CA2480865C (en) 2002-04-19 2003-04-15 Acid beneficiation of ore

Country Status (9)

Country Link
US (1) US7008602B2 (en)
EP (1) EP1499752B1 (en)
AT (1) ATE435309T1 (en)
AU (1) AU2003239166B2 (en)
BR (1) BRPI0309330B1 (en)
CA (1) CA2480865C (en)
DE (1) DE60328178D1 (en)
NO (1) NO20044509L (en)
WO (1) WO2003089674A2 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR0304443B1 (en) * 2003-10-28 2012-08-21 process for obtaining high thio2 and low radionuclide titanium concentrates from mechanical anatase concentrates.
JP5102770B2 (en) * 2005-10-11 2012-12-19 ヨマ インターナショナル アーエス Titanium product manufacturing process
US7625536B2 (en) * 2005-10-18 2009-12-01 Millennium Inorganic Chemicals, Inc. Titaniferous ore beneficiation
IL200860A (en) * 2009-09-10 2015-07-30 Green Future Ltd Galvanic waste sludge treatment and manufacturing of nano-sized iron oxides
GB2480439A (en) * 2010-05-17 2011-11-23 Tioxide Europe Ltd A process for forming ferrous sulphate monohydrate
DE102012104717A1 (en) * 2011-05-31 2012-12-06 Sachtleben Chemie Gmbh Process for the production of titanium dioxide
CN102336433A (en) * 2011-08-04 2012-02-01 四川龙蟒钛业股份有限公司 Pretreatment method in the process of preparing titanium dioxide by reusing acidolysis residues
US10287176B2 (en) 2014-07-08 2019-05-14 Avertana Limited Extraction of products from titanium-bearing minerals
CN104803415B (en) 2015-05-15 2016-06-15 云南民族大学 A kind of method being prepared rutile by acid-dissolved titanium slag
CN105296771B (en) * 2015-11-23 2018-05-22 沈阳理工大学 A kind of method using ilmenite concentrate production rich-titanium material
CN106745229B (en) * 2017-02-02 2018-07-31 徐州钛白化工有限责任公司 A kind of manufacture craft of pharmaceutical grade titanium dioxide
US10116224B1 (en) 2017-06-14 2018-10-30 Northrop Grumman Systems Corporation Switching power converter circuit
CN111910089A (en) * 2020-07-21 2020-11-10 山东鲁北企业集团总公司 Preparation method of titanium-rich raw material for producing titanium dioxide and titanium-rich raw material produced by using method
CN117396435A (en) * 2020-10-06 2024-01-12 美盛公司 Method for producing titanium dioxide from anatase ore by digestion with sulfuric acid and subsequent leaching, hydrolysis and calcination
CN114752772A (en) * 2022-03-16 2022-07-15 中南大学 Method for preparing fluidized chlorination furnace charge by upgrading titanium slag

Family Cites Families (69)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2899278A (en) 1959-08-11 lewis
US542749A (en) * 1895-07-16 Robert bateson
US2127247A (en) 1935-06-15 1938-08-16 Du Pont Preparation of compounds of titanium
US2488439A (en) 1946-03-09 1949-11-15 Du Pont Production of titanium oxide pigments
US2488440A (en) 1946-11-30 1949-11-15 Du Pont Titanium dioxide pigment production
US2559638A (en) 1947-07-25 1951-07-10 Du Pont Production of titanium dioxide
US2721626A (en) 1951-12-15 1955-10-25 Du Pont Cooling and separating by condensation of hot gaseous suspensions
US2833627A (en) 1956-01-03 1958-05-06 Du Pont Method for cooling the hot, gas-containing reaction products resulting from the oxidation of titanium tetrachloride
DE1111403B (en) 1958-01-11 1961-07-20 Sueddeutsche Kalkstickstoff Process for separating the alkaline earth metals and alkaline earth oxides from the reaction product of the metallo-thermal production of titanium or zirconium
GB980864A (en) 1960-01-15 1965-01-20 Laporte Titanium Ltd Improved process for the beneficiation of ores
GB1026691A (en) 1961-04-21 1966-04-20 Laporte Titanium Ltd Improvements in or relating to the treatment of titanium bearing ores
BE661424A (en) 1963-06-11 1900-01-01
US3467414A (en) * 1966-09-30 1969-09-16 Ronald T Downing Tube joint having buckled locking means
US3446590A (en) 1966-10-21 1969-05-27 Nat Lead Co Titanium dioxide concentrate and method for producing the same
AU416143B2 (en) 1967-05-01 1969-11-06 COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANIZATION and MURPHYORES INCORPORATED PTY. LTD A process forthe beneficiation of titaniferous ores
US3457037A (en) 1967-08-15 1969-07-22 Nat Lead Co Method for producing titanium dioxide concentrate from massive ilmenite ores
GB1243798A (en) 1968-08-14 1971-08-25 British Titan Ltd Formerly Bri Process of beneficiation
JPS4918330B1 (en) 1969-02-08 1974-05-09
GB1282506A (en) 1969-07-31 1972-07-19 British Titan Ltd A process for the removal of iron in the beneficiation of an iron-containing titaniferous material
GB1282504A (en) 1969-07-31 1972-07-19 British Titan Ltd Purification process for an iron-containing titaniferous material
BE754202A (en) 1969-07-31 1970-12-31 Titangesellschaft Mbg PROCESS FOR EXTRACTING IRON FROM TITANIUM ORE
US3877929A (en) 1969-07-31 1975-04-15 Jack Whitehead Process for reducing iron content of titaniferous material
GB1282507A (en) 1969-07-31 1972-07-19 British Titan Ltd Heat treatment of beneficiated titaniferous material
GB1282324A (en) 1969-07-31 1972-07-19 British Titan Ltd Process for the benification of iron-containing titaniferous materials
GB1282505A (en) 1969-07-31 1972-07-19 British Titan Ltd Beneficiation process for iron-containing titaniferous materials
CA923711A (en) 1969-09-12 1973-04-03 Ishihara Sangyo Kaisha Titanium dioxide concentrate and its manufacturing process
DE2004878C3 (en) 1969-10-15 1975-09-18 Benilite Corp. Of America, New York, N.Y. (V.St.A.) Process for enriching the titanium oxide content in titanium ores
US3825419A (en) 1969-10-15 1974-07-23 Benilite Corp Beneficiation of titaniferous ores
BE759753A (en) 1969-12-02 1971-06-02 Bayer Ag PROCESS FOR PREPARING TITANIUM DIOXIDE CONCENTRATES FROM ILMENITE
DE2024907C3 (en) 1970-05-22 1978-07-06 Bayer Ag, 5090 Leverkusen Process for the production of titanium dioxide concentrates from materials containing ilmenite
US3897537A (en) 1971-04-05 1975-07-29 Laporte Industries Ltd Beneficiation of ilmenite ores
GB1392441A (en) 1971-04-05 1975-04-30 Laporte Industries Ltd Beneficiation of ilmenite ores
US3660029A (en) 1971-04-09 1972-05-02 Edith W Carpenter Process for beneficiating ilmenite
US3743996A (en) * 1971-10-21 1973-07-03 Gen Electric Protective pads for electrical devices
GB1431552A (en) 1972-01-07 1976-04-07 Laporte Industries Ltd Beneficiation of weathered ilmenite ore materials
GB1431551A (en) 1972-01-07 1976-04-07 Laporte Industries Ltd Beneficiation of weathered ilmenite ore materials
US3875286A (en) 1972-02-14 1975-04-01 Laporte Industries Ltd Beneficiation of ilmenite ores
DE2234843A1 (en) 1972-07-15 1974-01-31 Bayer Ag PROCESS FOR THE MANUFACTURING OF TITANIUM DIOXIDE CONCENTRATES
DE2402464A1 (en) 1973-01-25 1974-11-14 Commw Scient Ind Res Org PROCESS FOR REFINING ILMENIT
US4038363A (en) 1975-10-21 1977-07-26 Quebec Iron & Titanium Corporation-Fer Et Titane Due Quebec, Inc. Upgrading sorelslag for production of synthetic rutile
US4019898A (en) 1976-04-30 1977-04-26 Benilite Corporation Of America Beneficiation of ilmenite ore
US4097574A (en) 1976-06-16 1978-06-27 United States Steel Corporation Process for producing a synthetic rutile from ilmentite
DE2630196A1 (en) 1976-07-05 1978-01-19 Bayer Ag METHOD FOR PRODUCING SULFURIC ACID FROM WASTE ACID AND IRON SULFATE
US4089675A (en) 1976-10-05 1978-05-16 American Cyanamid Company Combination beneficiation ilmenite digestion liquor reduction process
US4120694A (en) 1977-09-06 1978-10-17 The United States Of America As Represented By The Secretary Of The Interior Process for purifying a titanium-bearing material and upgrading ilmenite to synthetic rutile with sulfur trioxide
US4199552A (en) 1978-05-26 1980-04-22 Kerr-Mcgee Corporation Process for the production of synthetic rutile
US4288418A (en) * 1979-08-10 1981-09-08 Nl Industries, Inc. Process for manufacturing titanium dioxide
US4272343A (en) 1980-01-09 1981-06-09 Kerr-Mcgee Corporation Process for the electrolytic reductive leaching of ilmenite ore
US4321236A (en) 1981-02-05 1982-03-23 Kerr-Mcgee Chemical Corporation Process for beneficiating titaniferous materials
US4562048A (en) 1984-04-30 1985-12-31 Kerr-Mcgee Chemical Corporation Process for the treatment of metal-bearing ores
BR8701481A (en) 1986-04-03 1988-01-19 Du Pont PROCESS FOR PURIFICATION OF TIO2 ORE AND TIO2 PIGMENT OBTAINED BY THE PROCESS
DE3635010A1 (en) 1986-10-10 1988-04-14 Gock Eberhard Priv Doz Prof Dr Production of synthetic anatase from ilmenites using dilute acid
EP0265551B1 (en) 1986-10-31 1990-02-21 KRONOS TITAN-Gesellschaft mbH Process for the preparation of large scrubbing aggregates of titanium dioxide particles by the vapour phase oxidation of titanium tetrachloride, and its use in the prevention of scale formation in the same process
DE3843846C1 (en) 1988-12-24 1990-04-12 Bayer Ag, 5090 Leverkusen, De
MY106846A (en) * 1989-09-12 1995-08-30 Ishihara Sangyo Kaisha Process for producing titanium oxide concentrates.
JPH06501741A (en) 1990-03-02 1994-02-24 ウィメラ　インダストリアル　ミネラルズ　プロプライアタリー　リミティド Production of synthetic rutile
US5181956A (en) 1990-03-08 1993-01-26 E. I. Du Pont De Nemours And Company Method for purifying TiO2 ore
JP2968877B2 (en) 1991-11-08 1999-11-02 日鉄鉱業株式会社 Method for recovering sulfuric acid from waste sulfuric acid containing metal sulfate
WO1993018192A1 (en) 1992-03-09 1993-09-16 Pivot Mining Nl Continuous leaching of treated titaniferous ores with alcohol solutions
WO1993018191A1 (en) 1992-03-09 1993-09-16 Pivot Mining Nl Continuous leaching of treated titaniferous ores with inter-stage evaporation
US5266108A (en) 1992-04-22 1993-11-30 E. I. Du Pont De Nemours And Company Using compacted titanium dioxide pigment particles in the cooling section of the chloride process for making TiO2
CZ22695A3 (en) 1992-07-31 1996-01-17 Rgc Mineral Sands Ltd Process of treating titanium-containing materials
US5910621A (en) 1992-07-31 1999-06-08 Rgc Mineral Sands Treatment of titaniferous materials
US5378438A (en) 1992-11-30 1995-01-03 E. I. Du Pont De Nemours And Company Benefication of titaniferous ores
DE69415566T2 (en) 1993-02-23 1999-07-15 Boc Gases Australia Ltd Process for the production of synthetic rutile
EP0741802A4 (en) 1994-03-08 1997-05-21 Rgc Mineral Sands Ltd Leaching of titaniferous materials
GB9607743D0 (en) * 1996-04-13 1996-06-19 Tioxide Group Services Ltd Production of titanium oxide
CA2182123C (en) 1996-07-26 1999-10-05 Graham F. Balderson Method for the production of synthetic rutile
US6471743B1 (en) 1999-02-19 2002-10-29 Mbx Systems, Inc. Methods for leaching of ores

Also Published As

Publication number Publication date
DE60328178D1 (en) 2009-08-13
US20030198591A1 (en) 2003-10-23
ATE435309T1 (en) 2009-07-15
WO2003089674A2 (en) 2003-10-30
NO20044509L (en) 2004-11-05
EP1499752A2 (en) 2005-01-26
WO2003089674A3 (en) 2003-12-24
BRPI0309330B1 (en) 2016-07-26
AU2003239166B2 (en) 2008-08-14
US7008602B2 (en) 2006-03-07
BR0309330A (en) 2005-02-01
CA2480865C (en) 2011-07-26
AU2003239166A1 (en) 2003-11-03
EP1499752B1 (en) 2009-07-01

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