CN1085625C - Preparation of high-purity superfine electron-level ferric oxide powder - Google Patents
Preparation of high-purity superfine electron-level ferric oxide powder Download PDFInfo
- Publication number
- CN1085625C CN1085625C CN00111081A CN00111081A CN1085625C CN 1085625 C CN1085625 C CN 1085625C CN 00111081 A CN00111081 A CN 00111081A CN 00111081 A CN00111081 A CN 00111081A CN 1085625 C CN1085625 C CN 1085625C
- Authority
- CN
- China
- Prior art keywords
- chloride solution
- ferric chloride
- solution
- iron ore
- hydrochloric acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000000843 powder Substances 0.000 title claims abstract description 24
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 title claims description 11
- 238000002360 preparation method Methods 0.000 title claims description 10
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 title claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 38
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims abstract description 23
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 16
- 229910052742 iron Inorganic materials 0.000 claims abstract description 15
- 239000002245 particle Substances 0.000 claims abstract description 14
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000000605 extraction Methods 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 238000001556 precipitation Methods 0.000 claims abstract description 3
- 238000000746 purification Methods 0.000 claims abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 239000012074 organic phase Substances 0.000 claims description 18
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 12
- 229920002401 polyacrylamide Polymers 0.000 claims description 12
- 239000008346 aqueous phase Substances 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 8
- STCOOQWBFONSKY-UHFFFAOYSA-N tributyl phosphate Chemical compound CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 5
- 239000002244 precipitate Substances 0.000 claims description 4
- 239000008213 purified water Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 3
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 3
- 229910052593 corundum Inorganic materials 0.000 claims description 3
- 239000010431 corundum Substances 0.000 claims description 3
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 claims description 2
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 claims description 2
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 claims description 2
- 239000013078 crystal Substances 0.000 claims description 2
- 229910052595 hematite Inorganic materials 0.000 claims description 2
- 239000011019 hematite Substances 0.000 claims description 2
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 claims description 2
- 239000003350 kerosene Substances 0.000 claims description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims 2
- 235000019270 ammonium chloride Nutrition 0.000 claims 1
- 239000003960 organic solvent Substances 0.000 claims 1
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000001027 hydrothermal synthesis Methods 0.000 abstract description 2
- 238000009776 industrial production Methods 0.000 abstract 1
- 239000007769 metal material Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 27
- 229940032296 ferric chloride Drugs 0.000 description 12
- 239000008367 deionised water Substances 0.000 description 6
- 229910021641 deionized water Inorganic materials 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 239000012071 phase Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000012265 solid product Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 229910003145 α-Fe2O3 Inorganic materials 0.000 description 1
Landscapes
- Compounds Of Iron (AREA)
Abstract
本发明属于无机非金属材料领域。本发明的主要内容是利用铁矿石及工业盐酸、液氨作为主要原料，制取粗制氯化铁溶液后，经过萃取纯化，得到高纯度氯化铁溶液，然后通液氨沉淀及水热反应，制得颗粒度为0.03～0.20微米的高纯度超细电子级α-FeM2OM3粉体。它解决了现有技术存在的工艺复杂、生产成本高、污染环境等问题。本发明具有工艺简单、生产成本低、易于大规模工业化生产且不污染环境等优点。The invention belongs to the field of inorganic non-metallic materials. The main content of the present invention is to use iron ore, industrial hydrochloric acid, and liquid ammonia as the main raw materials to obtain a high-purity ferric chloride solution through extraction and purification after preparing crude ferric chloride solution, and then pass liquid ammonia precipitation and hydrothermal reaction to prepare high-purity ultra-fine electronic grade α-FeM 2 OM 3 powder with a particle size of 0.03-0.20 microns. It solves the problems of complex process, high production cost, environmental pollution and the like existing in the prior art. The invention has the advantages of simple process, low production cost, easy large-scale industrial production and no environmental pollution.
Description
The invention relates to a method for preparing high-purity superfine electronic grade ferric oxide (α -Fe)2O3) A preparation method of powder belongs to the field of inorganic nonmetallic materials.
α-Fe2O3The powder is used for magnetic material, electronic and telecommunication element material and for coloring fluorescent powder of color kinescope, and can raise red light brilliance and prolong service life. The more uniform the particle structure of the powder, the more regular the particles, the smaller the particle size and the better the material performance.
Preparation of α -Fe2O3The powder method is generally the following process route, and the used raw materials are scrap iron, titanium dioxide byproduct ferrous sulfate, steel mill pickling waste liquid crystallized iron salt and other waste byproducts:
the prior preparation process has the defects of complex process, high production cost, uneven powder granularity, large environmental pollution and the like.
The invention aims to solve the problems of low product purity, high cost, great environmental pollution and poor powder granularity in the prior art, and provides a new process route which comprises the following steps:
the method mainly comprises the steps of preparing a rough ferric chloride solution by using iron ore, industrial hydrochloric acid and liquid ammonia as main raw materials, extracting and purifying to obtain a high-purity ferric chloride solution, and then performing liquid ammonia precipitation and hydrothermal reaction to obtain the high-purity superfine electronic grade α -Fe with the granularity of 0.03-0.20 micrometer2O3The powder is prepared by the following specific steps:
1) firstly, according to the weight ratio of iron ore to hydrochloric acid of 1: 3-10, adding 29-31% industrial hydrochloric acid to be diluted with water to 16-22% and putting the iron ore into a reactor, stirring for 0.2-2 hours, introducing chlorine gas, wherein the weight ratio of the industrial hydrochloric acid to the iron ore is determined according to the ore type, the ratio of hematite to magnetite is 1: 100-150, the ratio of magnetite to magnetite is 1: 7-10, adding 0.01-1% concentration and 170-800 ten thousand molecular weight polyacrylamide solution into the reacted solution, the weight ratio of polyacrylamide to iron ore is 1: 1000-3000, settling for 0.1-1 hour, naturally cooling to room temperature, filtering to obtain a rough ferric chloride solution, and then, obtaining a rough ferric chloride solution
2) Adding hydrochloric acid into the rough ferric chloride solution to enable the concentration of free acid to reach 2-5 mol/L, extracting with methyl isobutyl ketone or tributyl phosphate/benzene or tributyl phosphate/sulfonated kerosene, wherein the volume ratio of an organic phase to an aqueous phase is 1: 0.5-3, back-extracting the organic phase with pure water or dilute ammonia water with the concentration of 0.05-0.5 mol/L, the volume ratio of the aqueous phase to the organic phase is 1: 0.7-2.0, adding polyacrylamide solution into the aqueous phase, settling for 0.1-1 hour, filtering to obtain a refined ferric chloride solution, and then adding the polyacrylamide solution into the aqueous phase to settle for 0.1-1 hour to obtain a refined ferric chloride solution
3) Adding a refined ferricchloride solution into a reactor, adding liquid ammonia until the pH value of the solution reaches 4-9, heating to 160-200 ℃ at a heating rate of 2-10 ℃/min, keeping the temperature for 2-8 hours, cooling to room temperature at a cooling rate of 2-10 ℃/min, centrifuging to separate out a precipitate, washing with purified water for three times, and then washing with purified water
4) And (3) putting the precipitate into a muffle furnace, heating to 400 ℃ at a heating rate of 3-10 ℃/min, keeping the temperature for 1-4 hours, and naturally cooling to room temperature to obtain the high-purity superfine electronic-grade ferric oxide powder.
The superfine α -Fe prepared by the method of the invention2O3The crystal form of the powder is a corundum structure, the appearance of the particles is uniform spherical, ellipsoidal or rhombic, the size is 0.03-0.20 micrometer, and the powder has good material performance.
The preparation method provided by the invention belongs to the preparation of α -Fe by an acid method2O3Powder, but different from any existing method, has the advantages that the refined ferric chloride solution which can be used for hydrolysis is obtained by extracting and back-extracting the crude ferric chloride solution obtained by the acidolysis of iron ore by industrial hydrochloric acid, wherein the residual small amount of extractant simultaneously controls α -Fe2O3The iron oxide powder obtained by the method of the invention is α -Fe with corundum structure2O3The particle size is 0.03-0.20 micron, the difference between the maximum particle radius and the minimum particle radius is only 0.01 micron, the uniformity is good, and the method has high material performance and chemical activity.
The invention has another characteristic that other reagents can be recycled or partially recycled except the iron raw material and the hydrochloric acid in the whole preparation process, and the environment pollution can not be generated, which is used for preparing α -Fe by an acid method2O3The other characteristic of the invention is α -Fe2O3The powder has high purity, and has very low content of impurity ions except water, such as silicon content of 46 × 10-6，Fe2O3The content is not less than 99.9%.
Example 1
Adding 7 parts of 22% industrial hydrochloric acid into 1 part of magnetite powder, stirring for 0.5 hour for dissolving, naturally cooling to room temperature, adding 0.005 part of 0.25% polyacrylamide solution, settling for 0.2 hour, filtering, adding 2 parts of 22% industrial hydrochloric acid into filtrate, extracting the solution with 9 parts of tributyl phosphate/benzene mixed solution (volume ratio 1: 1) to obtain an organic phase I and a raffinate II, performing three-time back extraction on the organic phase I with 9 parts of deionized water to obtain an aqueous phase I and an organic phase II, continuously extracting the raffinate with the organic phase II to obtain an organic phase III, performing three-time back extraction on the organic phase III with 9 parts of deionized water, mixing the obtained aqueous phase and the aqueous phase I, adding 0.005 part of 0.25% polyacrylamide solution, settling for 0.5 hour, filtering to obtain a refined ferric chloride solution, introducing liquid ammonia into the solution until the pH value is 5, placing the solution into a reaction vessel, reacting at 160 ℃ for 4 hours, naturally cooling to room temperature, centrifugally separating, washing the solid product with deionized water three times, roasting at 400 ℃ for 1 hour to obtain Fe in the product2O399.92% of silicon and 32X10 of silicon-6The particles are diamond-shaped and have a size of 0.04-0.05 μm.
Example 2
Taking 1 part of magnetite powder, adding 6 parts of industrial hydrochloric acid with the concentration of 22%, stirring for 0.5 hour for dissolution, introducing 0.12 part of chlorine, naturally cooling to room temperature, adding 0.004 part of 0.25% polyacrylamide solution, settling for 0.2 hour, filtering, adding 2 parts of 22% industrial hydrochloric acid into filtrate, extracting the solution with 8 parts of tributyl phosphate/benzene mixed solution (volume ratio is 1: 1) to obtain an organic phase I and a raffinate II, and then extractingThen, carrying out three-time back extraction on the organic phase I by using 8 parts of deionized water to obtain a water phase I and an organic phase II, then, continuously extracting raffinate by using the organic phase II to obtain an organic phase III, carrying out three-time back extraction on the organic phase III by using 8 parts of deionized water, mixing the obtained water phase with the water phase I, adding 0.004 part of 0.25 percent polyacrylamide solution, settling for 0.5 hour, filtering to obtain a refined ferric chloride solution, introducing liquid ammonia into the solution until the pH value is 5.5, placing the solution into a reaction vessel, reacting for 4 hours at 200 ℃, naturally cooling to room temperature, carrying out centrifugal separation, washing a solid product with the deionized water for three times, roasting for 1 hour at 600 ℃, and carrying out Fe roasting on the product2O399.90 percent of silicon content and 46 multiplied by 10 percent of silicon content-6The particles are spherical and have a size of 0.09 to 0.10 micrometer.
Claims (3)
1. A preparation method of high-purity superfine electronic grade ferric oxide is characterized in that after iron ore and industrial hydrochloric acid are used as main raw materials to prepare a crude ferric chloride solution, a refined ferric chloride solution is obtained through extraction and purification, and then liquid ammonia precipitation is carried out to prepare high-purity superfine electronic grade ferric oxide powder with the granularity of 30-200 nm, and the preparation method comprises the following steps:
1) firstly, according to the weight ratio of iron ore to hydrochloric acid of 1: 3-10, adding 29-31% industrial hydrochloric acid to be diluted with water to 16-22% and putting the iron ore into a reactor, stirring for 0.2-2 hours, introducing chlorine gas, wherein the weight ratio of the industrial hydrochloric acid to the iron ore is determined according to the ore type, the ratio of hematite to magnetite is 1: 100-150, the ratio of magnetite to magnetite is 1: 7-10, adding 0.01-1% concentration and 170-800 ten thousand molecular weight polyacrylamide solution into the reacted solution, the weight ratio of polyacrylamide to iron ore is 1: 1000-3000, settling for 0.1-1 hour, naturally cooling to room temperature, filtering to obtain a rough ferric chloride solution, and then, obtaining a rough ferric chloride solution
2) Adding hydrochloric acid into the rough ferric chloride solution to enable the concentration of free acid to reach 2-5 mol/L, extracting with methyl isobutyl ketone or tributyl phosphate/benzene or tributyl phosphate/sulfonated kerosene, wherein the volume ratio of an organic phase to an aqueous phase is 1: 0.5-3, back-extracting the organic phase with pure water or dilute ammonia water with the concentration of 0.05-0.5 mol/L, the volume ratio of the aqueous phase to the organic phase is 1: 0.7-2.0, adding polyacrylamide solution into the aqueous phase, settling for 0.1-1 hour, filtering to obtain a refined ferric chloride solution, and then adding the polyacrylamide solution into the aqueous phase to settle for 0.1-1 hour to obtain a refined ferric chloride solution
3) Adding a refined ferric chloride solution into a reactor, adding liquid ammonia until the pH value of the solution reaches 4-9, heating to 160-200 ℃ at a heating rate of 2-10 ℃/min, keeping the temperature for 2-8 hours, cooling to room temperature at a cooling rate of 2-10 ℃/min, centrifuging to separate out a precipitate, washing with purified water for three times, and then washing with purified water
4) And (3) putting the precipitate into a muffle furnace, heating to 400 ℃ at a heating rate of 3-10 ℃/min, keeping the temperature for 1-4 hours, and naturally cooling to room temperature to obtain the high-purity superfine electronic-grade ferric oxide powder.
2. The method for preparing high purity electronic grade ferric oxide powder as claimed in claim 1, wherein the acid solution obtained by extracting the crude ferric chloride solution with organic solvent is partially reused for acidolysis of iron ore, and is partially neutralized with dilute ammonia water to produce agricultural ammonium chloride, and the organic extractant is washed with water and then recycled.
3. The ultrafine ferric oxide powder prepared by the method according to claim 1, wherein the crystal form of the powder is corundum, the particle shape is uniform spherical, ellipsoid or rhombohedral, the particle size is 0.03-0.20 micron, and the difference between the maximum particle radius and the minimum particle radius is 0.01 micron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00111081A CN1085625C (en) | 2000-04-25 | 2000-04-25 | Preparation of high-purity superfine electron-level ferric oxide powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00111081A CN1085625C (en) | 2000-04-25 | 2000-04-25 | Preparation of high-purity superfine electron-level ferric oxide powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1267640A CN1267640A (en) | 2000-09-27 |
| CN1085625C true CN1085625C (en) | 2002-05-29 |
Family
ID=4581020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00111081A Expired - Fee Related CN1085625C (en) | 2000-04-25 | 2000-04-25 | Preparation of high-purity superfine electron-level ferric oxide powder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1085625C (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100390072C (en) * | 2006-10-24 | 2008-05-28 | 湘潭大学 | A method for preparing mica iron oxide by hydrothermal reaction crystallization |
| CN102528027B (en) * | 2012-02-24 | 2013-06-26 | 哈尔滨工业大学 | Preparation method for gold-shell magnetic ellipsoid |
| CN102649589B (en) * | 2012-05-24 | 2014-06-11 | 复旦大学 | Fibroin-controlled alpha type ferric oxide nano material and preparation method thereof |
| CN104909413A (en) * | 2015-06-17 | 2015-09-16 | 中国矿业大学 | Preparation method of ferric oxide nano hexagonal bipyramids |
| WO2018217739A1 (en) * | 2017-05-22 | 2018-11-29 | The American University In Cairo | Extraction of iron (iii) oxide from different iron-containing ores |
| CN107176624A (en) * | 2017-06-19 | 2017-09-19 | 华南理工大学 | A kind of spherical nano-sized iron oxide and preparation method thereof |
| CN108314090A (en) * | 2018-04-18 | 2018-07-24 | 中国科学院青海盐湖研究所 | A kind of preparation method of rhombohedron alpha-type ferric oxide |
| CN110304661A (en) * | 2019-06-20 | 2019-10-08 | 李柏丛 | New process for preparing high-performance iron oxide for soft ferrite |
| CN110467223A (en) * | 2019-07-17 | 2019-11-19 | 李柏丛 | The iron oxide red preparation high-performance iron oxide of steel mill's pickling solution production is used for the new process of soft magnetic materials |
| CN110342584A (en) * | 2019-07-18 | 2019-10-18 | 李柏丛 | The new process of soft magnetic materials is used for using steel mill's steel rolling byproduct iron scale preparation high-performance iron oxide |
| CN112573583A (en) * | 2020-12-14 | 2021-03-30 | 桃江县德聚人和中小企业公共服务平台有限公司 | Method for preparing ferric chloride by rapidly oxidizing ferrous chloride |
| CN113479938A (en) * | 2021-07-02 | 2021-10-08 | 内蒙古科技大学 | Method for preparing high-purity iron oxide by using iron oxide |
| CN116768279B (en) * | 2022-06-02 | 2024-11-19 | 恒升元(深圳)新材料科技有限公司 | Iron oxide red powder and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1177572A (en) * | 1996-09-26 | 1998-04-01 | 周永复 | Method for production of high-purity iron oxide red by using ammonia-soda process |
| CN1223966A (en) * | 1998-01-20 | 1999-07-28 | 湖南三环颜料有限公司 | Method for preparing high-temp. resistant iron oxide red |
| JP3045516B2 (en) * | 1990-04-19 | 2000-05-29 | 株式会社アドイン研究所 | Dynamic inference pattern generation system |
-
2000
- 2000-04-25 CN CN00111081A patent/CN1085625C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3045516B2 (en) * | 1990-04-19 | 2000-05-29 | 株式会社アドイン研究所 | Dynamic inference pattern generation system |
| CN1177572A (en) * | 1996-09-26 | 1998-04-01 | 周永复 | Method for production of high-purity iron oxide red by using ammonia-soda process |
| CN1223966A (en) * | 1998-01-20 | 1999-07-28 | 湖南三环颜料有限公司 | Method for preparing high-temp. resistant iron oxide red |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1267640A (en) | 2000-09-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1085625C (en) | Preparation of high-purity superfine electron-level ferric oxide powder | |
| JP6268328B2 (en) | Method for preparing nanometer titanium dioxide | |
| Xiong et al. | Preparation of TiO2 from ilmenite using sulfuric acid decomposition of the titania residue combined with separation of Fe3+ with EDTA during hydrolysis | |
| CN102796876B (en) | Method for extracting scandium oxide from titanium slag chloride waste | |
| CN103937998A (en) | Method for preparing low-silicon vanadium pentoxide from solution containing vanadium, chromium and silicon | |
| CN100475708C (en) | The preparation method of iron oxide | |
| CN101898791A (en) | Method for preparing rutile titanium dioxide from new process titanium slag | |
| CN107117652B (en) | A kind of method for obtaining ammonium metavanadate from alkaline vanadium-containing solution | |
| WO2019137544A1 (en) | Method for extracting valent component in vanadium titanium magnetite by means of oxygen-rich selective leaching | |
| CN102312090A (en) | Process for extracting scandium from ore containing scandium through pressure leaching | |
| CN102660678A (en) | Method for selectively separating iron from hydrochloric acid solution containing ferrous chloride | |
| CN102146523B (en) | Method for preparing titanium dioxide and ferric oxide from ilmenite | |
| CN101085732A (en) | Method for producing ferrous oxalate from hematite | |
| CN111020233B (en) | A kind of method for preparing vanadium pentoxide without ammonium precipitation of vanadium | |
| CN1114949A (en) | Preparation method of high-purity micro-fine rutile-type titanium dioxide | |
| CN100500570C (en) | A kind of method that prepares cerium dioxide from iron beneficiation tailings | |
| CN101210287A (en) | Acidolysis oxidation conversion method for extracting vanadium from stone coal | |
| CN1105682C (en) | Method for preparing nano cobalt oxide | |
| CN112320842A (en) | A kind of method for acidolysis of titanium slag | |
| CN113479937B (en) | Method for preparing spheroidal iron oxide | |
| CN101343064B (en) | Method for separating and purifying silicon dioxide and cerous chloride from crystal stone waste | |
| CN1310206A (en) | Nanometer level iron oxide red powder and its preparation | |
| CN108774692B (en) | A method for preparing titanium-rich material by using high permagnesium ilmenite and titanium-rich material prepared therefrom | |
| Liu et al. | Extraction behaviours of titanium and other impurities in the decomposition process of ilmenite by highly concentrated KOH solution | |
| CN113564368A (en) | A method for recovering nickel and cobalt from petroleum cracking catalyst dust |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |