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1. WO2020112221 - METHOD OF RECOVERING MATERIALS BOUND TO A METALLIC SUBSTRATE USING CRYOGENIC COOLING

Publication Number WO/2020/112221
Publication Date 04.06.2020
International Application No. PCT/US2019/052418
International Filing Date 23.09.2019
IPC
C22B 3/00 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
3Extraction of metal compounds from ores or concentrates by wet processes
C22B 7/00 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
7Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
CPC
C22B 1/005
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
1Preliminary treatment of ores or scrap
005Preliminary treatment of scrap
C22B 11/046
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
11Obtaining noble metals
04by wet processes
042Recovery of noble metals from waste materials
046from manufactured products, e.g. from printed circuit boards, from photographic films, paper or baths
C22B 11/048
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
11Obtaining noble metals
04by wet processes
042Recovery of noble metals from waste materials
048from spent catalysts
C22B 7/001
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
001Dry processes
C22B 7/004
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
001Dry processes
004separating two or more metals by melting out (liquation), i.e. heating above the temperature of the lower melting metal component(s); by fractional crystallisation (controlled freezing)
C22B 7/005
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
005Separation by a physical processing technique only, e.g. by mechanical breaking
Applicants
  • PGM RECOVERY SYSTEMS, INC. [US]/[US]
Inventors
  • SCHWENK, Edmond
Agents
  • MAYO, Joseph
Priority Data
16/200,44826.11.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD OF RECOVERING MATERIALS BOUND TO A METALLIC SUBSTRATE USING CRYOGENIC COOLING
(FR) PROCÉDÉ DE RÉCUPÉRATION DE MATÉRIAUX LIÉS À UN SUBSTRAT MÉTALLIQUE AU MOYEN D'UN REFROIDISSEMENT CRYOGÉNIQUE
Abstract
(EN)
A recycling process that facilitates separation of materials from metallic substrates by cryogenically cooling the recyclable items to induce embrittlement of the metals. Embrittled metals may be shattered more efficiently and with a higher yield of materials bound to the metallic substrates. Metal embrittlement may be induced by mixing the source stream with liquid nitrogen, and cooling the stream to approximately minus 200 °F. Multiple recovery stages may be employed to maximize the yield of the target materials, Embodiments may enable recovery of platinum group metals (PGMs) from catalytic converters with metallic foil substrates. Yield of PGMs may be enhanced by employing a primary recovery stage and a secondary recovery stage, by cryogenically cooling input materials for each stage, by mixing the pulverized material in secondary recovery with an aqueous solution to dissipate attractive charges, and by wet screening the pulverized material slurry to obtain the PGM particles.
(FR)
La présente invention concerne un procédé de recyclage qui facilite la séparation de matériaux de substrats métalliques par refroidissement cryogénique des articles recyclables afin d'induire une fragilisation des métaux. Des métaux fragilisés peuvent être brisés plus efficacement et présentent un rendement plus élevé de matériaux liés aux substrats métalliques. Une fragilisation de métal peut être induite par un mélange du flux source avec de l'azote liquide et le refroidissement du flux à environ moins 200 °F. De multiples étages de récupération peuvent être utilisés pour développer au maximum le rendement des matériaux cibles. Des modes de réalisation peuvent permettre la récupération de métaux du groupe du platine (MGP) à partir de convertisseurs catalytiques à l'aide des substrats de feuille métallique. Le rendement de MGP peut être amélioré par l'utilisation d'un étage de récupération primaire et d'un étage de récupération secondaire par refroidissement cryogénique de matériaux d'entrée pour chaque étage, par le mélange du matériau pulvérisé dans une récupération secondaire avec une solution aqueuse afin de dissiper des charges attractives et par le tamisage humide de la suspension de matériau pulvérisé afin d'obtenir les particules de MGP.
Also published as
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