CN110436488A - It is a kind of to prepare the dedicated intermixture of high-purity monohydrate lithium hydroxide - Google Patents
It is a kind of to prepare the dedicated intermixture of high-purity monohydrate lithium hydroxide Download PDFInfo
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- CN110436488A CN110436488A CN201910743491.1A CN201910743491A CN110436488A CN 110436488 A CN110436488 A CN 110436488A CN 201910743491 A CN201910743491 A CN 201910743491A CN 110436488 A CN110436488 A CN 110436488A
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- Prior art keywords
- lithium hydroxide
- hydroxide monohydrate
- purity
- mixing agent
- alkyl
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- GLXDVVHUTZTUQK-UHFFFAOYSA-M lithium;hydroxide;hydrate Chemical compound [Li+].O.[OH-] GLXDVVHUTZTUQK-UHFFFAOYSA-M 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 claims abstract description 24
- 239000000706 filtrate Substances 0.000 claims abstract description 16
- -1 phosphine compound Chemical class 0.000 claims abstract description 12
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims abstract description 10
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Natural products P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 claims abstract description 10
- 230000007935 neutral effect Effects 0.000 claims abstract description 10
- 229910000073 phosphorus hydride Inorganic materials 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- PQVSTLUFSYVLTO-UHFFFAOYSA-N ethyl n-ethoxycarbonylcarbamate Chemical compound CCOC(=O)NC(=O)OCC PQVSTLUFSYVLTO-UHFFFAOYSA-N 0.000 claims description 66
- 229940040692 lithium hydroxide monohydrate Drugs 0.000 claims description 66
- 239000003795 chemical substances by application Substances 0.000 claims description 28
- 238000002156 mixing Methods 0.000 claims description 28
- 125000000217 alkyl group Chemical group 0.000 claims description 16
- CRWNQZTZTZWPOF-UHFFFAOYSA-N 2-methyl-4-phenylpyridine Chemical compound C1=NC(C)=CC(C=2C=CC=CC=2)=C1 CRWNQZTZTZWPOF-UHFFFAOYSA-N 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 8
- 239000000047 product Substances 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 7
- 239000013078 crystal Substances 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 7
- 125000000951 phenoxy group Chemical group [H]C1=C([H])C([H])=C(O*)C([H])=C1[H] 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 5
- 125000004178 (C1-C4) alkyl group Chemical group 0.000 claims description 4
- 125000004209 (C1-C8) alkyl group Chemical group 0.000 claims description 4
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 abstract 2
- 239000012043 crude product Substances 0.000 abstract 1
- 238000002425 crystallisation Methods 0.000 abstract 1
- 230000008025 crystallization Effects 0.000 abstract 1
- FUGIIBWTNARRSF-UHFFFAOYSA-N decane-5,6-diol Chemical compound CCCCC(O)C(O)CCCC FUGIIBWTNARRSF-UHFFFAOYSA-N 0.000 abstract 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 abstract 1
- 238000001556 precipitation Methods 0.000 abstract 1
- 238000004321 preservation Methods 0.000 abstract 1
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 27
- 239000000203 mixture Substances 0.000 description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000007710 freezing Methods 0.000 description 6
- 230000008014 freezing Effects 0.000 description 6
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 5
- 229910052808 lithium carbonate Inorganic materials 0.000 description 5
- 239000012535 impurity Substances 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- INHCSSUBVCNVSK-UHFFFAOYSA-L lithium sulfate Inorganic materials [Li+].[Li+].[O-]S([O-])(=O)=O INHCSSUBVCNVSK-UHFFFAOYSA-L 0.000 description 3
- RBTVSNLYYIMMKS-UHFFFAOYSA-N tert-butyl 3-aminoazetidine-1-carboxylate;hydrochloride Chemical compound Cl.CC(C)(C)OC(=O)N1CC(N)C1 RBTVSNLYYIMMKS-UHFFFAOYSA-N 0.000 description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 238000009993 causticizing Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 239000012452 mother liquor Substances 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 235000011152 sodium sulphate Nutrition 0.000 description 2
- LKMDHQMGVTVIRI-UHFFFAOYSA-N [butyl(phenoxy)phosphoryl]oxybenzene Chemical compound C=1C=CC=CC=1OP(=O)(CCCC)OC1=CC=CC=C1 LKMDHQMGVTVIRI-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229920001429 chelating resin Polymers 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- QDYVPYWKJOJPBF-UHFFFAOYSA-M lithium;hydroxide;dihydrate Chemical compound [Li+].O.O.[OH-] QDYVPYWKJOJPBF-UHFFFAOYSA-M 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D15/00—Lithium compounds
- C01D15/02—Oxides; Hydroxides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
- C07F9/02—Phosphorus compounds
- C07F9/28—Phosphorus compounds with one or more P—C bonds
- C07F9/38—Phosphonic acids [RP(=O)(OH)2]; Thiophosphonic acids ; [RP(=X1)(X2H)2(X1, X2 are each independently O, S or Se)]
- C07F9/40—Esters thereof
- C07F9/4071—Esters thereof the ester moiety containing a substituent or a structure which is considered as characteristic
- C07F9/4084—Esters with hydroxyaryl compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of dedicated intermixtures of high-purity monohydrate lithium hydroxide, including following component of preparing: EDTA, dibutyl ethylene glycol ether and neutral phosphine compound.The application method of the dedicated intermixture is as follows: monohydrate lithium hydroxide crude product is added temperature stirring and dissolving of the pure water at 85-98 DEG C, then heat preservation is filtered, obtain filtrate, the dedicated intermixture is added in filtrate, then it carries out being cooled to 40-50 DEG C of precipitation monohydrate lithium hydroxide crystallization, it is then centrifuged for separating, dries, high-purity monohydrate lithium hydroxide can be obtained.Purity >=99.0% for high-purity monohydrate lithium hydroxide that the present invention obtains.
Description
Technical Field
The invention relates to the technical field of lithium hydroxide preparation, in particular to a special mixing agent for preparing high-purity lithium hydroxide monohydrate.
Background
Lithium-containing compounds, such as lithium carbonate, lithium hydroxide and the like, have unique physical and chemical properties, are widely applied in the fields of energy, chemical industry, metallurgy, ceramics, semiconductors, batteries and the like, particularly, the application of lithium hydroxide in ternary materials shows better electrical properties, and common battery-grade lithium carbonate is gradually replaced by lithium hydroxide due to low process and quality indexes of the lithium carbonate.
The current sources of processes for producing battery grade lithium hydroxide from lithium concentrates mainly include the following. One is a freezing method, lithium concentrate is roasted, ground, acidified and filtered to obtain a lithium sulfate solution, sodium hydroxide is added after the lithium sulfate process, sodium sulfate is removed by freezing, and then recrystallization is carried out twice to three times to obtain battery-grade lithium hydroxide. By adopting the freezing method lithium hydroxide process, a large amount of soluble impurities are brought after sodium hydroxide is added into a lithium sulfate solution, and the crystalline sodium sulfate generated after freezing is the only outlet of a system and cannot solve the problem of the soluble impurities, so that the problem of accumulation of the soluble impurities in the freezing method is caused by the defects of the process. In addition, the freezing process must be performed two to three times of evaporative recrystallization to obtain a relatively high purity product, and repeated operation means increased energy consumption and decreased yield.
And the other method is to adopt the causticizing process of industrial grade or salt lake lithium carbonate, carry out causticizing reaction on the lithium carbonate, and obtain the battery grade lithium hydroxide through purification, evaporation and concentration. However, this method has problems in that the process route is long, the amount of mother liquor to be post-treated is large, the energy consumption for evaporation is high, and the yield is low.
In order to solve the problems of low yield, large mother liquor amount, high evaporation energy consumption and soluble impurity accumulation in the prior art, a special mixing agent is added in the process of obtaining the lithium hydroxide monohydrate by adopting chelating resin ion exchange treatment, then concentrating, crystallizing and drying the lithium hydroxide solution, thereby improving the purity of the lithium hydroxide monohydrate.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a special mixing agent for preparing high-purity lithium hydroxide monohydrate.
The technical scheme of the invention is as follows:
a special mixing agent for preparing high-purity lithium hydroxide monohydrate comprises the following components: EDTA, diethylene glycol dibutyl ether, and a neutral phosphine compound.
Preferably, the neutral phosphine compound has the following chemical formula:
wherein,
r1 is selected from the group consisting of C1-C8 alkyl and H, preferably from C1-C4 alkyl and H, more preferably from C1-C2 alkyl and H;
r2 is selected from the group consisting of C1-C8 alkyl and H, preferably from C1-C4 alkyl and H, more preferably from C1-C2 alkyl and H;
r3 is selected from C1-C8 straight or branched chain alkyl, preferably from C3-C7 straight or branched chain alkyl, more preferably from C3-C7 straight chain alkyl;
r4 is selected from phenoxy or C1-C8 straight or branched chain alkyl, preferably from phenoxy or C4-C8 straight or branched chain alkyl, more preferably from phenoxy.
Preferably, the special mixture for preparing high-purity lithium hydroxide monohydrate comprises the following components in percentage by weight: 3-6% of EDTA, 25-35% of diethylene glycol dibutyl ether and the balance of neutral phosphine compound.
Preferably, the mass ratio of the adding amount of the special mixture for preparing the high-purity lithium hydroxide monohydrate to the pure lithium hydroxide monohydrate is (0.8-1.5): 100.
the pure lithium hydroxide monohydrate refers to the mass of the hydrate lithium hydroxide monohydrate in the crude lithium hydroxide monohydrate.
Preferably, the use method for preparing the special mixture for preparing the high-purity lithium hydroxide monohydrate comprises the following steps: adding pure water into the crude lithium hydroxide monohydrate product, stirring and dissolving at the temperature of 85-98 ℃, then preserving heat and filtering to obtain filtrate, adding the special mixing agent into the filtrate, then cooling to 40-50 ℃ to separate out lithium hydroxide monohydrate crystals, then carrying out centrifugal separation and drying to obtain the high-purity lithium hydroxide monohydrate.
Preferably, the purity of the high-purity lithium hydroxide monohydrate is more than or equal to 99.0%.
The invention has the advantages that: the special mixing agent for preparing high-purity lithium hydroxide monohydrate comprises the following components: EDTA, diethylene glycol dibutyl ether, and a neutral phosphine compound. The use method of the special mixture comprises the following steps: adding pure water into the crude lithium hydroxide monohydrate product, stirring and dissolving at the temperature of 85-98 ℃, then preserving heat and filtering to obtain filtrate, adding the special mixing agent into the filtrate, then cooling to 40-50 ℃ to separate out lithium hydroxide monohydrate crystals, then carrying out centrifugal separation and drying to obtain the high-purity lithium hydroxide monohydrate. The purity of the high-purity lithium hydroxide monohydrate obtained by the method is more than or equal to 99.0%.
Detailed Description
Example 1:
a special mixing agent for preparing high-purity lithium hydroxide monohydrate comprises the following components in percentage by weight: EDTA 4.5%, diethylene glycol dibutyl ether 32% and n-butyl diphenyl phosphonate.
The mass ratio of the addition amount of the special mixing agent for preparing the high-purity lithium hydroxide monohydrate to the pure lithium hydroxide monohydrate is 1.2: 100.
the using method of the special mixture for preparing the high-purity lithium hydroxide monohydrate comprises the following steps: adding pure water into the crude lithium hydroxide monohydrate product, stirring and dissolving at the temperature of 95 ℃, then preserving heat and filtering to obtain filtrate, adding the special mixing agent into the filtrate, then cooling to 45 ℃ to precipitate lithium hydroxide monohydrate crystals, then performing centrifugal separation and drying to obtain the high-purity lithium hydroxide monohydrate.
The purity of the high-purity lithium hydroxide monohydrate is 99.5%.
Example 2:
a special mixing agent for preparing high-purity lithium hydroxide monohydrate comprises the following components in percentage by weight: EDTA 6%, diethylene glycol dibutyl ether 25% and isobutyl diphenyl phosphonate ester the rest.
The mass ratio of the addition amount of the special mixing agent for preparing the high-purity lithium hydroxide monohydrate to the pure lithium hydroxide monohydrate is 1.5: 100.
the using method of the special mixture for preparing the high-purity lithium hydroxide monohydrate comprises the following steps: adding pure water into the crude lithium hydroxide monohydrate product, stirring and dissolving at the temperature of 98 ℃, then preserving heat and filtering to obtain filtrate, adding the special mixing agent into the filtrate, then cooling to 40 ℃ to precipitate lithium hydroxide monohydrate crystals, then performing centrifugal separation and drying to obtain the high-purity lithium hydroxide monohydrate.
The purity of the high-purity lithium hydroxide monohydrate is 99.2%.
Example 3:
a special mixing agent for preparing high-purity lithium hydroxide monohydrate comprises the following components in percentage by weight: EDTA 3%, diethylene glycol dibutyl ether 35% and di-n-butyl diphenyl phosphonate the rest.
The mass ratio of the addition amount of the special mixing agent for preparing the high-purity lithium hydroxide monohydrate to the pure lithium hydroxide monohydrate is 0.8: 100.
the using method of the special mixture for preparing the high-purity lithium hydroxide monohydrate comprises the following steps: adding pure water into the crude lithium hydroxide monohydrate product, stirring and dissolving at the temperature of 85 ℃, then preserving heat and filtering to obtain filtrate, adding the special mixing agent into the filtrate, then cooling to 50 ℃ to precipitate lithium hydroxide monohydrate crystals, then performing centrifugal separation and drying to obtain the high-purity lithium hydroxide monohydrate.
The purity of the high-purity lithium hydroxide monohydrate is 99.4%.
Example 4:
a special mixing agent for preparing high-purity lithium hydroxide monohydrate comprises the following components in percentage by weight: 4.3 percent of EDTA, 30 percent of diethylene glycol dibutyl ether and the balance of neutral phosphine compound.
Preferably, the neutral phosphine compound has the following chemical formula:
wherein R1 is C3 alkyl; r2 is H; r3 is C7 straight chain alkyl; r4 is phenoxy.
The mass ratio of the addition amount of the special mixing agent for preparing the high-purity lithium hydroxide monohydrate to the pure lithium hydroxide monohydrate is 1.0: 100.
the using method of the special mixture for preparing the high-purity lithium hydroxide monohydrate comprises the following steps: adding pure water into the crude lithium hydroxide monohydrate product, stirring and dissolving at the temperature of 95 ℃, then preserving heat and filtering to obtain filtrate, adding the special mixing agent into the filtrate, then cooling to 45 ℃ to precipitate lithium hydroxide monohydrate crystals, then performing centrifugal separation and drying to obtain the high-purity lithium hydroxide monohydrate.
The purity of the high-purity lithium hydroxide monohydrate is 99.3%.
Comparative example 1
The diphenyl n-butylphosphonate of example 1 was removed, and the remaining proportions and methods of use were unchanged.
The purity of the obtained high-purity lithium hydroxide monohydrate was 88.7%.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The special mixing agent for preparing high-purity lithium hydroxide monohydrate is characterized by comprising the following components: EDTA, diethylene glycol dibutyl ether, and a neutral phosphine compound.
2. The special mixing agent for preparing high-purity lithium hydroxide monohydrate according to claim 1, wherein the neutral phosphine compound has the following chemical formula:
wherein,
r1 is selected from the group consisting of C1-C8 alkyl and H, preferably from C1-C4 alkyl and H, more preferably from C1-C2 alkyl and H;
r2 is selected from the group consisting of C1-C8 alkyl and H, preferably from C1-C4 alkyl and H, more preferably from C1-C2 alkyl and H;
r3 is selected from C1-C8 straight or branched chain alkyl, preferably from C3-C7 straight or branched chain alkyl, more preferably from C3-C7 straight chain alkyl;
r4 is selected from phenoxy or C1-C8 straight or branched chain alkyl, preferably from phenoxy or C4-C8 straight or branched chain alkyl, more preferably from phenoxy.
3. The special mixing agent for preparing high-purity lithium hydroxide monohydrate according to claim 2, which comprises the following components in percentage by weight: 3-6% of EDTA, 25-35% of diethylene glycol dibutyl ether and the balance of neutral phosphine compound.
4. The special mixing agent for preparing high-purity lithium hydroxide monohydrate of claim 3, wherein the mass ratio of the addition amount of the special mixing agent for preparing high-purity lithium hydroxide monohydrate to the pure lithium hydroxide monohydrate is (0.8-1.5): 100.
5. the special mixing agent for preparing high-purity lithium hydroxide monohydrate according to claims 1 to 4, which is used by the following method: adding pure water into the crude lithium hydroxide monohydrate product, stirring and dissolving at the temperature of 85-98 ℃, then preserving heat and filtering to obtain filtrate, adding the special mixing agent into the filtrate, then cooling to 40-50 ℃ to separate out lithium hydroxide monohydrate crystals, then carrying out centrifugal separation and drying to obtain the high-purity lithium hydroxide monohydrate.
6. The special mixing agent for preparing high-purity lithium hydroxide monohydrate according to claim 5, wherein the purity of the high-purity lithium hydroxide monohydrate is not less than 99.0%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910743491.1A CN110436488A (en) | 2019-08-13 | 2019-08-13 | It is a kind of to prepare the dedicated intermixture of high-purity monohydrate lithium hydroxide |
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| CN201910743491.1A CN110436488A (en) | 2019-08-13 | 2019-08-13 | It is a kind of to prepare the dedicated intermixture of high-purity monohydrate lithium hydroxide |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102491377A (en) * | 2011-12-14 | 2012-06-13 | 江南大学 | Lithium hydroxide purifying method |
| CN102826576A (en) * | 2011-09-19 | 2012-12-19 | 四川长和华锂科技有限公司 | Method for industrially producing industrial, cell-grade or high-purity lithium hydroxide monohydrate |
| CN104944447A (en) * | 2015-06-25 | 2015-09-30 | 海门容汇通用锂业有限公司 | Method for preparing battery grade lithium hydroxide monohydrate |
| CN108085491A (en) * | 2016-11-22 | 2018-05-29 | 厦门稀土材料研究所 | A kind of method that neutrality phosphine extractant is used for extract and separate thorium |
| CN109231242A (en) * | 2018-11-09 | 2019-01-18 | 江苏容汇通用锂业股份有限公司 | A kind of method that lithium phosphate disposing mother liquor prepares battery-stage monohydrate lithium hydroxide |
-
2019
- 2019-08-13 CN CN201910743491.1A patent/CN110436488A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102826576A (en) * | 2011-09-19 | 2012-12-19 | 四川长和华锂科技有限公司 | Method for industrially producing industrial, cell-grade or high-purity lithium hydroxide monohydrate |
| CN102491377A (en) * | 2011-12-14 | 2012-06-13 | 江南大学 | Lithium hydroxide purifying method |
| CN104944447A (en) * | 2015-06-25 | 2015-09-30 | 海门容汇通用锂业有限公司 | Method for preparing battery grade lithium hydroxide monohydrate |
| CN108085491A (en) * | 2016-11-22 | 2018-05-29 | 厦门稀土材料研究所 | A kind of method that neutrality phosphine extractant is used for extract and separate thorium |
| CN109231242A (en) * | 2018-11-09 | 2019-01-18 | 江苏容汇通用锂业股份有限公司 | A kind of method that lithium phosphate disposing mother liquor prepares battery-stage monohydrate lithium hydroxide |
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Application publication date: 20191112 |