Preparing method of ferroferric oxide using iron scale
The invention discloses a preparing method of ferroferric oxide using iron scale. The method includes making the iron scale into FeSO4 solution; under the protection of nitrogen, dropwise adding ammonia solution to the FeSO4 solution, allowing Fe2+ to precipitate, so as to prepare a precursor, delta FeOOH, and controlling final PH value at 5.5 to 8.0; performing oxidation of the precursor at 80 to 100 DEG C for 1 to 3 hours to obtain the ferroferric oxide by the aid of the air-induced method; filtering a product, washing the product with water and drying it to obtain ultrafine homogeneous Fe3O4 spherical powder having good crystallinity; neutralizing ammonium sulfate mother solution obtained by filtering by the aid of lime to produce gypsum sediment and the ammonia solution; allowing the ammonia solution to return to the preparing process of Fe3O4 after filtration and concentration by evaporation. The method has the advantages of process simplicity, low cost of raw materials, recycling of ammonia in the system and environmental friendliness. Therefore, an effective, feasible, environment-friendly novel way for commercial production of Fe3O4 ultrafine powder is provided..
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Patent| Erscheinungsjahr: |
2015 |
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| Erschienen: |
2015 |
| Enthalten in: |
Europäisches Patentamt - (2015) vom: 12. Aug. Zur Gesamtaufnahme - year:2015 |
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| Sprache: |
Englisch |
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| Beteiligte Personen: |
JIANG KAIXI [VerfasserIn] |
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| Links: |
Volltext [kostenfrei] |
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| Anmerkungen: |
Source: www.epo.org (no modifications made), First posted: 2015-08-12, Last update posted on www.tib.eu: 2022-03-31, Last updated: 2023-02-09 |
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| Patentnummer: |
CN104828876 |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
EPA010913823 |
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| 245 | 1 | 0 | |a Preparing method of ferroferric oxide using iron scale |
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| 520 | |a The invention discloses a preparing method of ferroferric oxide using iron scale. The method includes making the iron scale into FeSO4 solution; under the protection of nitrogen, dropwise adding ammonia solution to the FeSO4 solution, allowing Fe2+ to precipitate, so as to prepare a precursor, delta FeOOH, and controlling final PH value at 5.5 to 8.0; performing oxidation of the precursor at 80 to 100 DEG C for 1 to 3 hours to obtain the ferroferric oxide by the aid of the air-induced method; filtering a product, washing the product with water and drying it to obtain ultrafine homogeneous Fe3O4 spherical powder having good crystallinity; neutralizing ammonium sulfate mother solution obtained by filtering by the aid of lime to produce gypsum sediment and the ammonia solution; allowing the ammonia solution to return to the preparing process of Fe3O4 after filtration and concentration by evaporation. The method has the advantages of process simplicity, low cost of raw materials, recycling of ammonia in the system and environmental friendliness. Therefore, an effective, feasible, environment-friendly novel way for commercial production of Fe3O4 ultrafine powder is provided. | ||
| 650 | 4 | |a che | |
| 650 | 4 | |a B82Y: Specific uses or applications of nanostructures; measurement or analysis of nanostructures; manufacture or treatment of nanostructures | |
| 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) | |
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| 700 | 0 | |a WANG HAIBEI |4 aut | |
| 700 | 0 | |a WANG SHENGDONG |4 aut | |
| 700 | 0 | |a FAN YANQING |4 aut | |
| 700 | 0 | |a JIANG XUNXIONG |4 aut | |
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