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1. (WO2010072773) HYDROMETALLURGICAL METHOD FOR THE REUSE OF SECONDARY ZINC OXIDES RICH IN FLUORIDE AND CHLORIDE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2010/072773 International Application No.: PCT/EP2009/067767
Publication Date: 01.07.2010 International Filing Date: 22.12.2009
Chapter 2 Demand Filed: 28.05.2010
IPC:
C22B 19/20 (2006.01) ,C22B 19/28 (2006.01) ,C22B 19/30 (2006.01) ,C22B 7/02 (2006.01) ,C22B 3/08 (2006.01) ,C22B 3/44 (2006.01) ,C22B 3/46 (2006.01)
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
B
PRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
19
Obtaining zinc or zinc oxide
20
Obtaining zinc otherwise than by distilling
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
B
PRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
19
Obtaining zinc or zinc oxide
28
from muffle furnace residues
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
B
PRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
19
Obtaining zinc or zinc oxide
30
from metallic residues or scraps
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
B
PRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
7
Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
02
Working-up flue dust
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
B
PRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
3
Extraction of metal compounds from ores or concentrates by wet processes
04
by leaching
06
in inorganic acid solutions
08
Sulfuric acid
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
B
PRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
3
Extraction of metal compounds from ores or concentrates by wet processes
20
Treatment or purification of solutions, e.g. obtained by leaching
44
by chemical processes
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
B
PRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
3
Extraction of metal compounds from ores or concentrates by wet processes
20
Treatment or purification of solutions, e.g. obtained by leaching
44
by chemical processes
46
by substitution, e.g. by cementation
Applicants:
PAUL WURTH S.A. [LU/LU]; 32, rue d'Alsace L-1122 Luxembourg, LU (AllExceptUS)
ROTH, Jean-Luc [FR/FR]; FR (UsOnly)
WEIGEL, Valérie [FR/FR]; FR (UsOnly)
MICHEL, Stéphanie [FR/FR]; FR (UsOnly)
PIEZANOWSKI, Ludivine [FR/FR]; FR (UsOnly)
Inventors:
ROTH, Jean-Luc; FR
WEIGEL, Valérie; FR
MICHEL, Stéphanie; FR
PIEZANOWSKI, Ludivine; FR
Agent:
OFFICE FREYLINGER; B.P. 48 L-8001 Strassen, LU
Priority Data:
91 50922.12.2008LU
Title (EN) HYDROMETALLURGICAL METHOD FOR THE REUSE OF SECONDARY ZINC OXIDES RICH IN FLUORIDE AND CHLORIDE
(FR) PROCEDE HYDROMETALLURGIQUE DE VALORISATION D'OXYDES DE ZINC SECONDAIRES RICHES EN FLURORURES ET CHLORURES
Abstract:
(EN) The present invention relates to a method for eliminating halides, in particular chlorides and fluorides, from secondary zinc oxides, for example Waelz or Primus oxides, including the steps of (1) stripping the secondary zinc oxides with sodium carbonate and separating the dry matter from the base liquid, (2) leaching at least one portion of the dry matter from step 1 using H2SO4, preferably until reaching a pH of 2.5 to 4, and separating the dry matter from the acid liquid, and (3) treating the liquid from step 2 by adding Al3+ ions and PO43- ions and a neutralising agent in order to eliminate the residual fluoride, preferably until reaching a pH of < 4, and separating the liquid from the dry matter containing the fluorides.
(FR) La présente invention propose un procédé d'élimination d'halogénures, en particulier de chlorures et de fluorures, au départ d'oxydes de zinc secondaires, par exemple des oxydes Waelz ou Primus, comprenant les étapes de (1) lavage des oxydes de zinc secondaires avec du carbonate de sodium et séparation du résidu solide du liquide basique, (2) lixiviation d'au moins une partie du résidu solide de l'étape 1 au moyen de H2SO4, de préférence jusqu'à un pH entre 2,5 et 4, et séparation du résidu solide du liquide acide, et (3) traitement du liquide de l'étape 2 par ajout d'ions Al3+ et d'ions PO43- et d'un agent neutralisant afin d'éliminer le fluorure résiduel, de préférence à un pH < 4, et séparation du liquide du résidu solide contenant les fluorures.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PE, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: French (FR)
Filing Language: French (FR)
Also published as:
UAa201109110EP2382332JP2012513536US20110268632CN102257169CA2744941
EA201100979MX2011006718KR1020110102461BRPI0922620AU2009331468IN4453/DELNP/2011