CN101037216A - Preparation technique of anhydrous lanthanum chloride by chlorination baking dehydration method - Google Patents
Preparation technique of anhydrous lanthanum chloride by chlorination baking dehydration method Download PDFInfo
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- CN101037216A CN101037216A CN 200610067759 CN200610067759A CN101037216A CN 101037216 A CN101037216 A CN 101037216A CN 200610067759 CN200610067759 CN 200610067759 CN 200610067759 A CN200610067759 A CN 200610067759A CN 101037216 A CN101037216 A CN 101037216A
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- Prior art keywords
- roasting
- anhydrous lanthanum
- lanthanum chloride
- chloride
- preparation
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- ICAKDTKJOYSXGC-UHFFFAOYSA-K lanthanum(iii) chloride Chemical compound Cl[La](Cl)Cl ICAKDTKJOYSXGC-UHFFFAOYSA-K 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 238000006297 dehydration reaction Methods 0.000 title claims abstract description 12
- 230000018044 dehydration Effects 0.000 title claims abstract description 11
- 238000005660 chlorination reaction Methods 0.000 title claims abstract description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 23
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910000041 hydrogen chloride Inorganic materials 0.000 claims abstract description 23
- 239000007789 gas Substances 0.000 claims abstract description 21
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 13
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000013078 crystal Substances 0.000 claims description 5
- 208000005156 Dehydration Diseases 0.000 claims 2
- 230000002401 inhibitory effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 7
- 239000012535 impurity Substances 0.000 abstract description 6
- 229910052761 rare earth metal Inorganic materials 0.000 abstract description 6
- 150000002910 rare earth metals Chemical class 0.000 abstract description 5
- 238000005868 electrolysis reaction Methods 0.000 abstract description 2
- 229910052746 lanthanum Inorganic materials 0.000 abstract description 2
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 150000003839 salts Chemical class 0.000 abstract description 2
- JEROREPODAPBAY-UHFFFAOYSA-N [La].ClOCl Chemical compound [La].ClOCl JEROREPODAPBAY-UHFFFAOYSA-N 0.000 abstract 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 9
- 230000008020 evaporation Effects 0.000 description 6
- 238000001704 evaporation Methods 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- WVFDFRMEPUYSCI-UHFFFAOYSA-M Cl[La] Chemical compound Cl[La] WVFDFRMEPUYSCI-UHFFFAOYSA-M 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000006837 decompression Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000036571 hydration Effects 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 3
- 230000007062 hydrolysis Effects 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 235000019270 ammonium chloride Nutrition 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 229910017414 LaAl Inorganic materials 0.000 description 1
- 229910002420 LaOCl Inorganic materials 0.000 description 1
- 229940055858 aluminum chloride anhydrous Drugs 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- DKAGJZJALZXOOV-UHFFFAOYSA-N hydrate;hydrochloride Chemical class O.Cl DKAGJZJALZXOOV-UHFFFAOYSA-N 0.000 description 1
- 229910052747 lanthanoid Inorganic materials 0.000 description 1
- 150000002602 lanthanoids Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- -1 rare earth chloride Chemical class 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000001149 thermolysis Methods 0.000 description 1
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
本发明公开了无水氯化镧的氯化焙烧脱水法制备工艺，该技术属于精细无机化学试剂制备技术领域。以LaCl3·7H2O为初始原料，采用氯化氢保护下的焙烧脱水处理进行无水氯化镧的制备。在氯化焙烧脱水处理过程中，保持通入足量干燥氯化氢气体，逐步升高焙烧温度，焙烧温度控制于200～300℃，进行5～10小时焙烧处理。此工艺能够充分有效地抑制水解反应，避免产生氯氧化镧杂质，从而制备出较高纯度的无水氯化镧，所获无水氯化镧试剂可广泛应用于金属镧的熔盐电解法生产、相关稀土材料的制备等技术领域。The invention discloses a preparation process of anhydrous lanthanum chloride by a chlorination roasting dehydration method, which belongs to the technical field of preparation of fine inorganic chemical reagents. Using LaCl 3 ·7H 2 O as the initial raw material, anhydrous lanthanum chloride was prepared by roasting and dehydration under the protection of hydrogen chloride. During the chlorination roasting and dehydration process, a sufficient amount of dry hydrogen chloride gas is kept flowing, and the roasting temperature is gradually increased, and the roasting temperature is controlled at 200-300° C., and the roasting treatment is carried out for 5-10 hours. This process can fully and effectively inhibit the hydrolysis reaction and avoid the production of lanthanum oxychloride impurities, thereby preparing anhydrous lanthanum chloride with higher purity. The obtained anhydrous lanthanum chloride reagent can be widely used in the molten salt electrolysis production of metal lanthanum , Preparation of related rare earth materials and other technical fields.
Description
Technical field
The invention belongs to fine inorganic chemical reagent preparing technical field.Anhydrous lanthanum chloride is the fine inorganic chemical reagent that has significant application value in the rare earth material production, the invention discloses the novel process of preparation anhydrous lanthanum chloride, adopt this technology can prepare the anhydrous lanthanum chloride of higher degree, the anhydrous lanthanum chloride reagent that obtains can be widely used in the fused salt electrolysis process production of lanthanoid metal, the technical fields such as preparation of relevant rare earth material.
Background technology
Along with the development of modern new material technology, anhydrous lanthanum chloride reagent obtains more and more important use in the rare earth material field, and in the process of the relevant rare earth material of development, high-pure anhydrous Lanthanum trichloride often becomes the gordian technique condition of material preparation.Existing so far more anhydrous lanthanum chloride preparation method's research report, these preparation methods mainly contain following several: (1) decompression roasting evaporation: under reduced pressure, the roasting processed by the hydration Lanthanum trichloride is with the preparation anhydrous lanthanum chloride; (2) ammonium chloride chlorination process: generate intermediate compound 2NH by lanthanum trioxide and the reaction of excess chlorination ammonium
4ClLaCl
3, under the decompression roasting condition, make intermediate compound generation thermolysis, thereby obtain anhydrous lanthanum chloride; (3) chemical vapor transport method: in the closed system that keeps the proper temperature gradient, make lanthanum trioxide and excessive Aluminum chloride anhydrous generate gaseous state title complex LaAl in the reaction of comparatively high temps district
3Cl
12, gaseous state title complex diffusion transport gradually deposits anhydrous lanthanum chloride through decomposition reaction again to lower temperature region; (4) other chlorination process: in exhausted water reaction system, adopt tetracol phenixin steam chloride oxidation lanthanum, with the preparation anhydrous lanthanum chloride.In these preparation methods, decompression roasting evaporation and ammonium chloride chlorination process all are difficult to avoid a small amount of Lanthanum trichloride generation hydrolysis, prepared product purity is lower, the preparation process technical qualification of chemical vapor transport method and other chlorination process have relatively high expectations or the reaction process time oversize, be difficult to realize the batch preparations of anhydrous lanthanum chloride.
Because the chemical property of rare earth chloride, the Lanthanum trichloride that is obtained under wet-chemical prepares condition often forms the hydration Lanthanum trichloride, and its saturated chloride monohydrate is the LaCl that contains crystal water
37H
2O adopts the processed method its contained crystal water progressively can be removed, and is yet evaporation prepares anhydrous lanthanum chloride institute inherent technical barrier: must manage fully to suppress moisture muriate generation hydrolysis, to avoid producing Lanthanum monochloride monoxide impurity.In existing decompression roasting dehydration preparation method, reduced pressure helps realizing dewatering, but can not suppress Lanthanum trichloride generation hydrolysis reaction, thereby obtained product still contains more Lanthanum monochloride monoxide impurity.The invention provides the chloridizing roasting evaporation preparation technology of anhydrous lanthanum chloride, with LaCl
37H
2O is an initial feed; adopt the roasting processed under the dry hydrogen chloride protection to carry out the preparation of anhydrous lanthanum chloride; this technology can suppress hydrolysis reaction fully effectively, avoids producing Lanthanum monochloride monoxide impurity, thereby can prepare the anhydrous lanthanum chloride reagent of higher degree.
Summary of the invention
According to the elementary heat chemical process of hydration Lanthanum trichloride generation dehydration reaction, with LaCl
37H
2O is a raw material, adopts the chloridizing roasting evaporation to prepare anhydrous lanthanum chloride, promptly under the dry hydrogen chloride gas protection, with LaCl
37H
2O carries out roasting under proper temperature, make LaCl
37H
2O progressively sloughs contained crystal water, to obtain the anhydrous lanthanum chloride of higher degree.The basic craft course of anhydrous lanthanum chloride preparation is: with LaCl
37H
2O contains into the boat-shaped quartz glass crucibles, sends in the quartz glass tube that is installed on tube type resistance furnace, steel cylinder is adorned dry hydrogen chloride gas feed quartz glass tube, and the maturing temperature that progressively raises through 5～10 hours calcination process, makes LaCl
37H
2O progressively sloughs contained humidity; In the processed process, the hydrogen chloride tail gas that adopts the diluted sodium hydroxide solution absorption system to discharge; After the roasting dehydration finishes, feed the hydrogen chloride gas of high pure nitrogen, take out treated anhydrous powder rapidly, sealed preservation to retain in the pipe blow-through.
In above-mentioned chloridizing roasting processed technology, in order fully to suppress moisture muriate generation hydrolysis, to avoid producing Lanthanum monochloride monoxide impurity, this technology must be taked two gordian technique measures: the suitable maturing temperature of (1) control is the most important condition that suppresses hydrolysis reaction.Under the situation that satisfies the dehydration requirement, should control lower maturing temperature as far as possible, maturing temperature is controlled in 200～300 ℃ usually; (2) feeding dry hydrogen chloride gas is the prerequisite that suppresses hydrolysis reaction.Actual roasting dehydration experiment shows, only depends on the suitable maturing temperature of control, still has a small amount of LaCl
3Hydrolysis reaction takes place, and contains LaOCl impurity in the obtained product to some extent.In roasting processed process, in tube type resistance furnace, continue to feed dry hydrogen chloride gas, to suppress moisture muriate generation hydrolysis reaction fully, can obtain more satisfactory dehydrating effect, thereby prepare the anhydrous lanthanum chloride of higher degree.
With both at home and abroad the report method compare, adopt the prepared anhydrous lanthanum chloride purity of chloridizing roasting processed method than higher, this technology can be applicable to batch preparations anhydrous lanthanum chloride reagent, also can attempt being applied to prepare other light rare earths anhydrous chloride.Utilize above-mentioned dewatering processing device, can prepare nearly tens kilograms of anhydrous lanthanum chlorides at every turn.Making anhydrous lanthanum chloride through the chloridizing roasting processed is the exsiccant white powder, and the anhydrous lanthanum chloride powder is easy to the moisture absorption in air, should give sealing and preserves.
Description of drawings
Chloridizing roasting dehydration experiment equipment used as shown in Figure 1, this equipment comprises hydrogen chloride gas body source, tube type resistance furnace and device for absorbing tail gas.The hydrogen chloride gas body source is a steel cylinder dress dry hydrogen chloride, and steel cylinder is furnished with special corrosion-resistant reducing valve; Quartz glass tube is installed in the tube type resistance furnace, and pending raw material splendid attire is put into the quartz glass tube middle part in the boat-shaped quartz crucible; Pipeline junction keeps good resistance to air loss, and device for absorbing tail gas is used for the hydrogen chloride tail gas that absorption system is discharged.In chloridizing roasting processed process, by polyfluortetraethylene pipe gas continue is fed tube type resistance furnace, the water vapor of deviating from from moisture muriate condensation and splash into the glass surge flask gradually, hydrogen chloride tail gas then enters sodium hydroxide solution and is absorbed.
Embodiment
Embodiments of the invention are listed below:
(1) with 1000g LaCl
37H
2O contains into the boat-shaped quartz glass crucibles, is positioned over the middle part of quartz glass tube in the tube type resistance furnace; Connect whole breather line system, feed the resistance to air loss of high pure nitrogen with the check pipeline; Open tube type resistance furnace and carry out heat treated, open hydrogenchloride gas cylinder reducing valve simultaneously, continue to feed dry hydrogen chloride in stove, air flow maintains 0.5～1 liter/minute.In roasting processed process, the maturing temperature that progressively raises is incubated earlier roasting 0.5 hour respectively under 100 ℃, 150 ℃, 200 ℃, and the furnace temperature to 250 that raises again ℃ was carried out the roasting processed 5 hours, made LaCl
37H
2O progressively sloughs contained crystal water, and water vapor continue to be discharged along with hci gas flow, gradually condensation and splash into the glass surge flask; Adopt diluted sodium hydroxide solution absorbing hydrogen chloride tail gas.The roasting processed comparatively fast is cooled near room temperature furnace temperature after finishing, and feeds high pure nitrogen with hydrogen chloride gas in the pipe blow-through, takes out treated powder rapidly, is sealed preservation.
(2) with 5000g LaCl
37H
2O contains into the boat-shaped quartz glass crucibles, is positioned over the middle part of quartz glass tube in the tube type resistance furnace; Connect whole breather line system, feed the resistance to air loss of high pure nitrogen with the check pipeline; Open tube type resistance furnace and carry out heat treated, continue simultaneously to feed dry hydrogen chloride in stove, air flow maintains 1.5～3 liters/minute.Be incubated earlier roasting 0.5 hour under 100 ℃, 150 ℃, 200 ℃ respectively, the furnace temperature to 230 that raises again ℃ was carried out the roasting processed 8 hours; Adopt diluted sodium hydroxide solution absorbing hydrogen chloride tail gas.The roasting processed comparatively fast is cooled near room temperature furnace temperature after finishing, and feeds high pure nitrogen with hydrogen chloride gas in the pipe blow-through, takes out treated powder rapidly, is sealed preservation.
Claims (4)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610067759 CN101037216A (en) | 2006-03-14 | 2006-03-14 | Preparation technique of anhydrous lanthanum chloride by chlorination baking dehydration method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610067759 CN101037216A (en) | 2006-03-14 | 2006-03-14 | Preparation technique of anhydrous lanthanum chloride by chlorination baking dehydration method |
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| Publication Number | Publication Date |
|---|---|
| CN101037216A true CN101037216A (en) | 2007-09-19 |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2422365C1 (en) * | 2009-11-19 | 2011-06-27 | Гоу Впо "Сибирский Государственный Индустриальный Университет" | Apparatus for producing anhydrous lanthanide trichlorides |
| CN102781894A (en) * | 2010-03-04 | 2012-11-14 | 陶氏环球技术有限责任公司 | Process for producing methyl chloride and sulfur dioxide |
| RU2471710C1 (en) * | 2011-05-31 | 2013-01-10 | Учреждение Российской Академии Наук Институт Нефтехимии И Катализа Ран | Method of obtaining compounds of divalent lanthanides |
| CN103691337A (en) * | 2013-12-12 | 2014-04-02 | 宁夏东方钽业股份有限公司 | Preparation method of anhydrous lanthanum chloride and halogen salt mixture |
| CN104973617A (en) * | 2015-07-01 | 2015-10-14 | 乐山沃耐稀电子材料有限公司 | Preparation method of anhydrous lanthanum chloride |
| CN106915763A (en) * | 2017-05-02 | 2017-07-04 | 乐山沃耐稀电子材料有限公司 | A kind of high-purity anhydrous lanthanum chloride preparation technology |
| CN107487778A (en) * | 2016-06-13 | 2017-12-19 | 有研稀土新材料股份有限公司 | High-pure anhydrous rare earth halide and preparation method thereof |
| CN107604385A (en) * | 2017-09-12 | 2018-01-19 | 中国科学院青海盐湖研究所 | Magnesium-rare earth alloy is electrolysed the preparation method of raw material |
| CN112607761A (en) * | 2020-12-28 | 2021-04-06 | 包头市明芯科技有限公司 | Preparation method of high-purity anhydrous rare earth chloride |
| CN113800551A (en) * | 2021-10-27 | 2021-12-17 | 福建省长汀金龙稀土有限公司 | Method for preparing rare earth oxide powder by utilizing steam roasting of rare earth chloride |
| CN113830818A (en) * | 2021-10-11 | 2021-12-24 | 天津包钢稀土研究院有限责任公司 | Preparation method of anhydrous rare earth halide |
| CN114634198A (en) * | 2022-03-31 | 2022-06-17 | 山东金能环保科技有限公司 | Preparation method of high-purity anhydrous lanthanum chloride |
| CN114772627A (en) * | 2022-03-30 | 2022-07-22 | 蜂巢能源科技(无锡)有限公司 | Dehydration purification method and application of solid electrolyte |
| CN115520891A (en) * | 2022-08-26 | 2022-12-27 | 内蒙古医科大学 | Preparation method and application of potential medicament lanthanum chloride for effectively improving vascular calcification |
| CN116332220A (en) * | 2023-05-29 | 2023-06-27 | 研峰科技(北京)有限公司 | Synthesis method of lanthanum (III) chloride bis (lithium chloride) |
-
2006
- 2006-03-14 CN CN 200610067759 patent/CN101037216A/en active Pending
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2422365C1 (en) * | 2009-11-19 | 2011-06-27 | Гоу Впо "Сибирский Государственный Индустриальный Университет" | Apparatus for producing anhydrous lanthanide trichlorides |
| CN102781894A (en) * | 2010-03-04 | 2012-11-14 | 陶氏环球技术有限责任公司 | Process for producing methyl chloride and sulfur dioxide |
| CN102781894B (en) * | 2010-03-04 | 2014-11-05 | 陶氏环球技术有限责任公司 | Process for producing methyl chloride and sulfur dioxide |
| RU2471710C1 (en) * | 2011-05-31 | 2013-01-10 | Учреждение Российской Академии Наук Институт Нефтехимии И Катализа Ран | Method of obtaining compounds of divalent lanthanides |
| CN103691337A (en) * | 2013-12-12 | 2014-04-02 | 宁夏东方钽业股份有限公司 | Preparation method of anhydrous lanthanum chloride and halogen salt mixture |
| CN104973617A (en) * | 2015-07-01 | 2015-10-14 | 乐山沃耐稀电子材料有限公司 | Preparation method of anhydrous lanthanum chloride |
| CN107487778A (en) * | 2016-06-13 | 2017-12-19 | 有研稀土新材料股份有限公司 | High-pure anhydrous rare earth halide and preparation method thereof |
| CN107487778B (en) * | 2016-06-13 | 2019-12-31 | 有研稀土新材料股份有限公司 | High-purity anhydrous rare earth halide and preparation method thereof |
| CN106915763A (en) * | 2017-05-02 | 2017-07-04 | 乐山沃耐稀电子材料有限公司 | A kind of high-purity anhydrous lanthanum chloride preparation technology |
| CN107604385A (en) * | 2017-09-12 | 2018-01-19 | 中国科学院青海盐湖研究所 | Magnesium-rare earth alloy is electrolysed the preparation method of raw material |
| CN112607761A (en) * | 2020-12-28 | 2021-04-06 | 包头市明芯科技有限公司 | Preparation method of high-purity anhydrous rare earth chloride |
| CN112607761B (en) * | 2020-12-28 | 2022-04-08 | 包头市明芯科技有限公司 | Preparation method of high-purity anhydrous rare earth chloride |
| CN113830818A (en) * | 2021-10-11 | 2021-12-24 | 天津包钢稀土研究院有限责任公司 | Preparation method of anhydrous rare earth halide |
| CN113800551A (en) * | 2021-10-27 | 2021-12-17 | 福建省长汀金龙稀土有限公司 | Method for preparing rare earth oxide powder by utilizing steam roasting of rare earth chloride |
| CN114772627A (en) * | 2022-03-30 | 2022-07-22 | 蜂巢能源科技(无锡)有限公司 | Dehydration purification method and application of solid electrolyte |
| CN114772627B (en) * | 2022-03-30 | 2024-02-13 | 蜂巢能源科技(无锡)有限公司 | Dehydration purification method and application of solid electrolyte |
| CN114634198A (en) * | 2022-03-31 | 2022-06-17 | 山东金能环保科技有限公司 | Preparation method of high-purity anhydrous lanthanum chloride |
| CN115520891A (en) * | 2022-08-26 | 2022-12-27 | 内蒙古医科大学 | Preparation method and application of potential medicament lanthanum chloride for effectively improving vascular calcification |
| CN116332220A (en) * | 2023-05-29 | 2023-06-27 | 研峰科技(北京)有限公司 | Synthesis method of lanthanum (III) chloride bis (lithium chloride) |
| CN116332220B (en) * | 2023-05-29 | 2023-08-11 | 研峰科技(北京)有限公司 | Synthesis method of lanthanum (III) chloride bis (lithium chloride) |
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