Method of purifying metal oxide particles and uses thereof
A method of purifying a plurality of metal oxide particles produced from a synthesis process comprising the step of washing a plurality of metal oxide particles in a first solvent composition comprising of at least one aliphatic ether, and at least one flocculant. In one embodiment, the plurality of metal oxide particles are iron oxide particles produced from a thermal decomposition synthesis process between an iron-oleate complex and oleic acid in 1-octadecene, wherein the first solvent composition comprises a 1:1 (vol/vol) ratio of an aliphatic ether in the form of diethyl ether and a flocculant in the form of methanol. The washed iron oxide particles are further washed in a second solvent composition comprising a 1:1 (vol/vol) ratio of hexane and ethanol, and then finally dispersed in hexane. The resulting iron oxide particles find use as a contrast agent for magnetic resonance imaging (MRI) or as magnetic particles in magnetic separation, magnetism-directed targeting or magnetism-induced heating..
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Patent| Erscheinungsjahr: |
2022 |
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| Erschienen: |
2022 |
| Enthalten in: |
Europäisches Patentamt - (2022) vom: 08. März Zur Gesamtaufnahme - year:2022 |
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| Sprache: |
Englisch |
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| Beteiligte Personen: |
ANDERSON AMANDA [VerfasserIn] |
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| Links: |
Volltext [kostenfrei] |
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| Anmerkungen: |
Source: www.epo.org (no modifications made), First posted: 2022-03-08, Last update posted on www.tib.eu: 2022-11-25, Last updated: 2023-02-09 |
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| Patentnummer: |
US11267723 |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
EPA016257537 |
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| 520 | |a A method of purifying a plurality of metal oxide particles produced from a synthesis process comprising the step of washing a plurality of metal oxide particles in a first solvent composition comprising of at least one aliphatic ether, and at least one flocculant. In one embodiment, the plurality of metal oxide particles are iron oxide particles produced from a thermal decomposition synthesis process between an iron-oleate complex and oleic acid in 1-octadecene, wherein the first solvent composition comprises a 1:1 (vol/vol) ratio of an aliphatic ether in the form of diethyl ether and a flocculant in the form of methanol. The washed iron oxide particles are further washed in a second solvent composition comprising a 1:1 (vol/vol) ratio of hexane and ethanol, and then finally dispersed in hexane. The resulting iron oxide particles find use as a contrast agent for magnetic resonance imaging (MRI) or as magnetic particles in magnetic separation, magnetism-directed targeting or magnetism-induced heating. | ||
| 650 | 4 | |a B03C: Magnetic or electrostatic separation of solid materials from solid materials or fluids; separation by high-voltage electric fields (filters making use of electricity or magnetism b01d0035060000;separating isotopes b01d0059000000;combinations of magnetic or electrostatic separation with separation of solids by other means b03b, b07b;separating sheets from piles b65h0003000000;magnets or magnet coils per seh01f) | |
| 650 | 4 | |a C01B: Non-metallic elements; compounds thereof (fermentation or enzyme-using processes for the preparation of elements or inorganic compounds except carbon dioxide c12p0003000000; production of non-metallic elements or inorganic compounds by electrolysis or electrophoresis c25b) | |
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| 650 | 4 | |a A61K: Preparations for medical, dental, or toilet purposes (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms a61j0003000000;chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles a61l; soap compositions c11d) | |
| 650 | 4 | |a H01F: Magnets; inductances; transformers; selection of materials for their magnetic properties | |
| 650 | 4 | |a B03D: Flotation; differential sedimentation (in combination with other separation of solids b03b;sink-float separation b03b0005280000) | |
| 650 | 4 | |a C01G: Compounds containing metals not covered by subclasses c01d or c01f (metal hydrides c01b0006000000; salts of oxyacids of halogens c01b0011000000; peroxides, salts of peroxyacids c01b0015000000; thiosulfates, dithionites, polythionates c01b0017640000; compounds containing selenium or tellurium c01b0019000000; binary compounds of nitrogen with metals c01b0021060000; azides c01b0021080000; metal amides c01b0021092000; nitrites c01b0021500000; phosphides c01b0025080000; salts of oxyacids of phosphorus c01b0025160000; carbides c01b0032900000; compounds containing silicon c01b0033000000; compounds containing boron c01b0035000000; compounds having molecular sieve properties but not having base-exchange properties c01b0037000000; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, c01b0039000000; cyanides c01c0003080000; salts of cyanic acid c01c0003140000; salts of cyanamide c01c0003160000; thiocyanates c01c0003200000; fermentation or enzyme-using processes for the preparation of elements or inorganic compounds except carbon dioxide c12p0003000000; obtaining metal compounds from mixtures, e.g. ores, which are intermediate compounds in a metallurgical process for obtaining a free metal c21b, c22b; production of non-metallic elements or inorganic compounds by electrolysis or electrophoresis c25b) | |
| 650 | 4 | |a B01D: Separation (separating solids from solids by wet methods b03b, b03d, by pneumatic jigs or tables b03b, by other dry methods b07;magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields b03c;centrifuges b04b; vortex apparatus b04c;presses per se for squeezing-out liquid from liquid-containing material b30b0009020000) | |
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