1. WO2026174347 - CLEAN HYDROMETALLURGY PROCESS TO PRODUCE ALUMINA FROM LOW GRADE MATERIALS

Publication Number WO/2026/174347

Publication Date 27.08.2026

International Application No. PCT/AU2026/050128

International Filing Date 18.02.2026

IPC

C22B 3/06 2006.1

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

C22B 3/20 2006.1

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

C22B 3/22 2006.1

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
22	by physical processes, e.g. by filtration, by magnetic means

C22B 3/44 2006.1

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

C22B 21/00 2006.1

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
21	Obtaining aluminium

C22B 58/00 2006.1

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
58	Obtaining gallium or indium

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C22B 3/06 2006.1

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

C22B 3/20 2006.1

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

C22B 3/22 2006.1

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
22	by physical processes, e.g. by filtration, by magnetic means

C22B 3/44 2006.1

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

C22B 21/00 2006.1

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
21	Obtaining aluminium

C22B 58/00 2006.1

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
58	Obtaining gallium or indium

C22B 59/00 2006.1

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
59	Obtaining rare earth metals

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Applicants

• ALTILIUM LICENSING LTD [GB]/[AU]

Inventors

• TRIFILIO, Orestes Humberto
• MADDIPATI, Sravan Kumar

Agents

• MEYER WEST IP PTY LTD

Priority Data

63/760,682

20.02.2025

US

Publication Language English (en)

Filing Language English (en)

Designated States

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AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CV, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IQ, IR, IS, IT, JM, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, MG, MK, MN, MU, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UY, UZ, VC, VN, WS, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, CV, GH, GM, KE, LR, LS, MU, MW, MZ, NA, RW, SC, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, ME, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)

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Title

(EN) CLEAN HYDROMETALLURGY PROCESS TO PRODUCE ALUMINA FROM LOW GRADE MATERIALS

(FR) PROCÉDÉ D'HYDROMÉTALLURGIE PROPRE POUR PRODUIRE DE L'ALUMINE À PARTIR DE MATÉRIAUX PAUVRES

Abstract

(EN) The subject disclosure is directed to improved methods for processing starting materials in the form of bauxite residues, low grade or off-spec ores, process tailings, and fly ash. More specifically, these starting materials include anything that cannot be processed by other methods, yet which still include valuable alumina and other metals, so as to recover the metal compounds contained therein. The improved methods also enables the recovery of most of the nitric acid required by the process, to reduce acid waste generated by previous processes.

(FR) La présente invention concerne des procédés améliorés de traitement de matériaux de départ sous la forme de résidus de bauxite, de minerais pauvres ou hors spécification, de résidus de traitement et de cendres volantes. Plus spécifiquement, ces matériaux de départ comprennent tout ce qui ne peut pas être traité par d'autres procédés, mais qui comprend encore de l'alumine exploitable et d'autres métaux, de façon à récupérer les composés métalliques contenus à l'intérieur de ceux-ci. Les procédés améliorés permettent également la récupération de la majeure partie de l'acide nitrique requis par le procédé, pour réduire les déchets acides générés par les procédés précédents.

Latest bibliographic data on file with the International Bureau

The publication of an international application under the Patent Cooperation Treaty in PATENTSCOPE (which constitutes an element of the Gazette) does not imply the expression of any opinion whatsoever on the part of the International Bureau of WIPO concerning the legal status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries.