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1. WO2020220117 - PROCESS TO RECOVER ALKALI FROM A METAL OXIDE/HYDROXIDE CONTAINING MATERIAL

Publication Number WO/2020/220117
Publication Date 05.11.2020
International Application No. PCT/CA2020/050555
International Filing Date 28.04.2020
Chapter 2 Demand Filed 26.02.2021
IPC
C01D 1/20 2006.1
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
DCOMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
1Oxides or hydroxides of sodium, potassium, or alkali metals in general
04Hydroxides
20Preparation by reacting oxides or hydroxides with alkali metal salts
C01D 1/04 2006.1
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
DCOMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
1Oxides or hydroxides of sodium, potassium, or alkali metals in general
04Hydroxides
CPC
C01D 1/22
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
DCOMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
1Oxides or hydroxides of sodium, potassium or alkali metals in general
04Hydroxides
20Preparation by reacting oxides or hydroxides with alkali metal salts
22with carbonates or bicarbonates
C01D 7/00
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
DCOMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
7Carbonates of sodium, potassium or alkali metals in general
C01P 2006/80
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
2006Physical properties of inorganic compounds
80Compositional purity
C22B 26/10
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
26Obtaining alkali, alkaline earth metals or magnesium
10Obtaining alkali metals
C22B 7/008
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
7Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; ; Methods of a general interest or applied to the winning of more than two metals
006Wet processes
008by an alkaline or ammoniacal leaching
Applicants
  • FPINNOVATIONS [CA]/[CA]
Inventors
  • MAHMOOD, Talat
  • JEMAA, Naceur
Agents
  • NORTON ROSE FULBRIGHT CANADA LLP S.E.N.C.R.L., S.R.L.
Priority Data
62/839,94229.04.2019US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) PROCESS TO RECOVER ALKALI FROM A METAL OXIDE/HYDROXIDE CONTAINING MATERIAL
(FR) PROCÉDÉ DE RÉCUPÉRATION D'ALCALI À PARTIR D'UN MATÉRIAU CONTENANT UN OXYDE/HYDROXYDE MÉTALLIQUE
Abstract
(EN) A process for recovering alkali from power boiler ash is provided. The power boiler ash is first contacted with Na2CO3 to produce a mixture containing settling and non-settling solid particles. A fraction of the settling particles is then separated from the mixture to produce a first clarified alkaline solution. The first clarified alkaline solution contains species such as NaOH and KOH depending upon the power boiler ash characteristics. The non-settling solid particles may optionally be further separated from the first clarified alkaline solution to obtain a second clarified alkaline solution. This process is also applicable for the extraction of alkali from other oxide/hydroxide containing materials.
(FR) La présente invention se rapporte à un procédé permettant de récupérer un alcali à partir de cendres de chaudière de production d'énergie. Les cendres de chaudière de production d'énergie sont d'abord mises en contact avec du Na2CO3 pour produire un mélange contenant des particules solides de sédimentation et des particules solides ne sédimentant pas. Une fraction des particules de sédimentation est ensuite séparée du mélange pour produire une première solution alcaline clarifiée. La première solution alcaline clarifiée contient des espèces telles que du NaOH et du KOH en fonction des caractéristiques des cendres de la chaudière de production d'énergie. Les particules solides ne sédimentant pas peuvent éventuellement être en outre séparées de la première solution alcaline clarifiée pour obtenir une seconde solution alcaline clarifiée. Ce procédé est également applicable à l'extraction d'alcali à partir d'autres matériaux contenant de l'oxyde/de l'hydroxyde.
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