CN107739825B - A method of vanadium product is prepared using containing vanadium leachate - Google Patents
A method of vanadium product is prepared using containing vanadium leachate Download PDFInfo
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- CN107739825B CN107739825B CN201711045681.3A CN201711045681A CN107739825B CN 107739825 B CN107739825 B CN 107739825B CN 201711045681 A CN201711045681 A CN 201711045681A CN 107739825 B CN107739825 B CN 107739825B
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- 229910052720 vanadium Inorganic materials 0.000 title claims abstract description 101
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 title claims abstract description 101
- 238000000034 method Methods 0.000 title claims abstract description 51
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 45
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000009835 boiling Methods 0.000 claims abstract description 24
- 239000012065 filter cake Substances 0.000 claims abstract description 24
- 239000000047 product Substances 0.000 claims abstract description 22
- 239000006228 supernatant Substances 0.000 claims abstract description 22
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 238000005406 washing Methods 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 9
- 239000008367 deionised water Substances 0.000 claims description 9
- 229910021641 deionized water Inorganic materials 0.000 claims description 9
- 238000002791 soaking Methods 0.000 claims description 9
- 229910052710 silicon Inorganic materials 0.000 abstract description 7
- 238000003756 stirring Methods 0.000 abstract description 7
- 239000010703 silicon Substances 0.000 abstract description 3
- 238000005272 metallurgy Methods 0.000 abstract description 2
- 239000012535 impurity Substances 0.000 description 8
- 239000011734 sodium Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 229910052708 sodium Inorganic materials 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 5
- 238000000746 purification Methods 0.000 description 5
- 229910052804 chromium Inorganic materials 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 229910052700 potassium Inorganic materials 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000000413 hydrolysate Substances 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 2
- 238000011031 large-scale manufacturing process Methods 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001698 pyrogenic effect Effects 0.000 description 2
- 238000000638 solvent extraction Methods 0.000 description 2
- 229910001456 vanadium ion Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- UNTBPXHCXVWYOI-UHFFFAOYSA-O azanium;oxido(dioxo)vanadium Chemical compound [NH4+].[O-][V](=O)=O UNTBPXHCXVWYOI-UHFFFAOYSA-O 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- LPUQAYUQRXPFSQ-DFWYDOINSA-M monosodium L-glutamate Chemical compound [Na+].[O-]C(=O)[C@@H](N)CCC(O)=O LPUQAYUQRXPFSQ-DFWYDOINSA-M 0.000 description 1
- 235000013923 monosodium glutamate Nutrition 0.000 description 1
- 239000004223 monosodium glutamate Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- -1 sodium vanadates Chemical class 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- LSGOVYNHVSXFFJ-UHFFFAOYSA-N vanadate(3-) Chemical group [O-][V]([O-])([O-])=O LSGOVYNHVSXFFJ-UHFFFAOYSA-N 0.000 description 1
- WQEVDHBJGNOKKO-UHFFFAOYSA-K vanadic acid Chemical compound O[V](O)(O)=O WQEVDHBJGNOKKO-UHFFFAOYSA-K 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/22—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/44—Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/20—Obtaining niobium, tantalum or vanadium
- C22B34/22—Obtaining vanadium
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
The invention discloses a kind of using the method for preparing vanadium product containing vanadium leachate, belongs to field of metallurgy.Technical problem to be solved by the invention is to provide a kind of methods that vanadium product is prepared from containing vanadium leachate.A method of vanadium product is prepared using containing vanadium leachate, comprising the following steps: A, will be contained vanadium leachate standing, and be taken supernatant liquor；B, supernatant liquor is added into hydrochloric acid, it is stirring while adding, it finishes, solution is heated to boiling, keep 10~20min of boiling, filtered after solution is cooling, obtain filter cake；C, filter cake is washed, dries, and obtains red vanadium.The problem of the method for the present invention is removed by standing containing the high concentration silicon in vanadium leachate, and hydrochloric acid is added and generates the red vanadium of high-purity, solves and prepares high purity vanadic anhydride method complex procedures at present, and time-consuming, higher cost.
Description
Technical field
The invention belongs to field of metallurgy, and in particular to a method of vanadium product is prepared using containing vanadium leachate.
Background technique
Vanadium is referred to as " monosodium glutamate of modern industry ", is the important additives of modern industry.It is wide due to the excellent performance of vanadium
It is general to be applied to the fields such as steel and iron industry, aerospace industry, chemical industry and light and textile industries.
Vanadium is resourceful in the world, widely distributed, but without individually for the rich ore of exploitation, always with it is low-grade with it is other
Mineral intergrowth.For vanadium extraction raw material there are many kinds of, vanadium titano-magnetite is the primary raw material of vanadium extraction, in the world vanadium annual output
88% is obtained from vanadium titano-magnetite, and in addition there are also culm, dead catalyst, petroleum lime-ash etc..Because the type of raw material,
The extraction process of the difference vanadium of property and content of vanadium also has difference.The main method that vanadium is extracted from vanadium-containing material has pyrogenic process, wet
Method and pyrogenic process, wet method combined process, most mature technology are sodium roasting, leaching, precipitation technique.
Extracting vanadium from stone coal or the obtained vanadium product impurity content of Leaching of Vanadium from Vanadium slag are high, cannot be directly used to certain high-end products
Production, it is therefore desirable to which further purification processes are carried out to it.Due to the limitation of current production technology, so that high-purity five oxidation two
There is the drawbacks such as production technology complexity, production cycle length, production cost height for the preparation of vanadium.High purity vanadic anhydride is prepared at present
Method mainly have solvent extraction, ion-exchange and the chemical precipitation method of purification.Wherein, solvent extraction, ion-exchange
And the method that a variety of purification modes combine preparation prepares high purity vanadic anhydride, product purity is higher, and quality is stablized, pollution
It is small, but production technology is loaded down with trivial details, thus it is not suitable for industrialization large-scale production.Crystallisation, which purifies vanadium, has product purity height, matter
The advantages that amount is stablized, is pollution-free.But there are vanadium to lose the disadvantages of big and energy consumption is big.Chemical subtraction-multistage purification
Method of purification, technique is relatively simple, not high to equipment requirement, is suitable for industrialization large-scale production, but material and energy
Consumption it is big, the loss of vanadium is big.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of methods that vanadium product is prepared from containing vanadium leachate, solve
High purity vanadic anhydride method complex procedures are prepared at present, the problem of higher cost.
The present invention solves above-mentioned technical problem the technical solution adopted is that providing a kind of utilize prepares vanadium containing vanadium leachate
The method of product, method includes the following steps:
A, vanadium leachate standing will be contained, take supernatant liquor；
B, supernatant liquor is added into hydrochloric acid, it is stirring while adding, it finishes, solution is heated to boiling, keep boiling 10
~20min filters after solution is cooling, obtains filter cake；
C, filter cake is washed, dries, and obtains red vanadium.
Wherein, in the above method, in step A, described containing vanadium concentration in vanadium leachate is 20~60g/L.
Wherein, in the above method, in step A, the time of the standing is 3~5d.
Wherein, in the above method, in step B, the concentration of the hydrochloric acid is 2~5mol/L.
Wherein, in the above method, in step B, the volume ratio of the hydrochloric acid and supernatant liquor is 1:1.5~1:2.5.
Wherein, in the above method, in step C, the operation of the washing is that filter cake deionized water washing by soaking is many
It filters after 5min, then is filtered after washing no less than 5min with soaked in absolute ethyl alcohol.
Wherein, utilization described above is prepared containing vanadium leachate in the method for vanadium product, further comprising the steps of:
D, by red vanadium 2~5mol/L dissolving with hydrochloric acid obtained by step C, after solution is heated to boiling, holding boiling 10~
20min is filtered after solution is cooling, and filter cake is washed, dries, and obtains vanadic anhydride.
The beneficial effects of the present invention are:
The method of the present invention is low to the requirement containing vanadium leachate, can avoid high silicon containing silicon in vanadium leachate to red by standing
The influence of vanadium quality, does not increase additional process and cost；The method of the present invention operation is simpler, mainly comprises the following steps in hydrochloric acid solution
It is added a certain proportion of containing vanadium leachate；The step is broad to the requirement of solution reaction endpoint pH, and the volume of leachate is added
Volume ratio with dilute hydrochloric acid solution is 1.5-2.0；Ammonium metavanadate can be directly made after handling in the red vanadium of preparation gained
(AMV), AMV returned it is molten after high purity vanadic anhydride can directly be made, full-flow process is simple, to production equipment require it is lower,
Technique overall time is short, at low cost.
Specific embodiment
Specifically, it is a kind of using the method for preparing vanadium product containing vanadium leachate, method includes the following steps:
A, vanadium leachate standing will be contained, take supernatant liquor；
B, supernatant liquor is added into hydrochloric acid, it is stirring while adding, it finishes, solution is heated to boiling, keep boiling 10
~20min filters after solution is cooling, obtains filter cake；
C, filter cake is washed, dries, and obtains red vanadium.
It is to go out to be made by water logging, the pH containing vanadium leachate is generally 9~10, mainly after sodium method roasts containing vanadium leachate
Impurity element includes Na, K, Ca, Cr, Fe, Si etc., wherein [Na]=10~60g/L, [Cr]=0.5~5g/L, [Si]=0.5
~5g/L, [K]=0.2~1.5g/L, [V]=20~60g/L；The method of the present invention can use the above-mentioned vanadium leachate that contains and prepare vanadium
Product.
Suspended matter and colloidal substance impurity are typically contained containing vanadium leachate, the present invention will first contain vanadium leachate and stand 3~5d,
Suspended matter and colloidal substance precipitating, directly take supernatant liquor by overflow in leachate；The step does not increase operation additionally,
According to the phasor of vanadium ion in the solution, pH is different, and existence form is different, and hydrolysate is also different.Acidity is very
Gao Shi, the vanadium in solution is with V2O5Form exist, direct hydrolysis when heating, product is with V2O5Based on, impurity content is few,
Therefore the product purity of preparation is high, therefore concentration of hydrochloric acid employed in the method for the present invention is 2~5mol/L, and control hydrochloric acid and
The volume ratio of supernatant liquor is 1:1.5~1:2.5, to guarantee red vanadium purity；If acidity is lower, vanadium ion is mostly with H2V12O31、
The forms such as more vanadic acid roots exist, and hydrolysate is vanadate, and impurity difficulty removes, therefore supernatant is added to hydrochloric acid the present invention
In, if changing addition sequence, impurity content is exceeded in the product of preparation.
In the method for the present invention step C, the operation of the washing is that filter cake is no less than 5min with deionized water washing by soaking
After filter, then washed with soaked in absolute ethyl alcohol and no less than filtered after 5min；The red vanadium of gained is vanadic anhydride and more sodium vanadates
Mixture, impurity content is less than 3%.
The method of the present invention, which is utilized, prepares a variety of vanadium products containing vanadium leachate, can also include following step after red vanadium is made
It is rapid:
D, by red vanadium 2~5mol/L dissolving with hydrochloric acid obtained by step C, after solution is heated to boiling, holding boiling 10~
20min is filtered after solution is cooling, and filter cake is washed, dries, and obtains vanadic anhydride.
In step D, the operation of the washing is to filter after filter cake is no less than 5min with deionized water washing by soaking, then use
Soaked in absolute ethyl alcohol washing filters after being no less than 5min；Gained purity of vanadium pentoxide is high, and impurity content is less than
0.1%.
Preferably, a method of it utilizes and prepares vanadium product containing vanadium leachate, method includes the following steps:
A, vanadium leachate will be contained and stand 3~5d, take supernatant liquor；Described containing vanadium concentration in vanadium leachate is 20~60g/L；
B, supernatant liquor is added in the hydrochloric acid for being 2~5mol/L to concentration, it is stirring while adding, it finishes, solution is heated
To boiling, 10~20min of boiling is kept, is filtered after solution is cooling, obtains filter cake；The volume ratio of the hydrochloric acid and supernatant liquor is
1:1.5~1:2.5；
C, filter cake is washed, dries, and obtains red vanadium；The operation of the washing is that filter cake deionized water washing by soaking is many
It filters after 5min, then is filtered after washing no less than 5min with soaked in absolute ethyl alcohol.
Below by test example and embodiment, invention is further described in detail, but does not therefore protect the present invention
Scope limitation is among the embodiment described range.
Embodiment 1
A, vanadium leachate ([V]=30g/L) will be contained and stand 5d, take supernatant liquor；
B, 700mL supernatant liquor is taken, is slowly added to be to finish in 2mol/L hydrochloric acid solution to 350mL concentration under stirring, it will
After solution is heated to boiling, boiling 15min is kept, is filtered after solution is cooling, obtains filter cake；
C, filter cake is filtered, 60 DEG C with filtering after deionized water washing by soaking 5min after washing 5min with soaked in absolute ethyl alcohol
Drying to constant weight, obtains red vanadium, and vanadium yield is 72%.
Inspection prepares TV:47.29%, Na:2.35%, Si:0.146%, K:0.049%, Cr in the red vanadium of gained:
0.073%.
Embodiment 2
A, vanadium leachate ([V]=40g/L) will be contained and stand 5d, take supernatant liquor；
B, 700mL supernatant liquor is taken, is slowly added to be to finish in 3mol/L hydrochloric acid solution to 300mL concentration under stirring, it will
After solution is heated to boiling, boiling 10min is kept, is filtered after solution is cooling, obtains filter cake；
C, filter cake is filtered, 60 DEG C with filtering after deionized water washing by soaking 5min after washing 5min with soaked in absolute ethyl alcohol
Drying to constant weight, obtains red vanadium, and vanadium yield is 76%.
Inspection prepares TV:46.29%, Na:2.25%, Si:0.140%, K:0.042%, Cr in the red vanadium of gained:
0.067%.
Embodiment 3
A, vanadium leachate ([V]=50g/L) will be contained and stand 3d, take supernatant liquor；
B, 800mL supernatant liquor is taken, is slowly added to be to finish in 5mol/L hydrochloric acid solution to 500mL concentration under stirring, it will
After solution is heated to boiling, boiling 15min is kept, is filtered after solution is cooling, obtains filter cake；
C, filter cake is filtered, 60 DEG C with filtering after deionized water washing by soaking 5min after washing 5min with soaked in absolute ethyl alcohol
Drying to constant weight, obtains red vanadium, and vanadium yield is 70%.
Inspection prepares TV:46.25%, Na:1.60%, Si:0.151%, K:0.051%, Cr in the red vanadium of gained:
0.066%.
Embodiment 4
Vanadic anhydride is prepared using red vanadium obtained by Examples 1 to 3, solution is heated to boiling by 2mol/L dissolving with hydrochloric acid
Afterwards, boiling 10min is kept, is filtered after solution is cooling, with filtering after deionized water washing by soaking 5min, uses soaked in absolute ethyl alcohol
It is filtered after washing 5min, 60 DEG C drying to constant weight, and gained vanadic anhydride yield is 75%, wherein TV47.29%,
Na0.006%, Si0.062%, K0.0049%, Cr0.0075%.
Claims (4)
1. utilizing the method for preparing vanadium product containing vanadium leachate, it is characterised in that: the following steps are included:
A, vanadium leachate standing will be contained, take supernatant liquor；
B, supernatant liquor is added into hydrochloric acid, after being heated to boiling, keeps 10~20min of boiling, is filtered after solution is cooling,
Obtain filter cake；The concentration of the hydrochloric acid is 2~5mol/L；The volume ratio of the hydrochloric acid and supernatant liquor is 1:1.5~1:2.5；
C, filter cake is washed, dries, and obtains red vanadium；
D, by red vanadium 2~5mol/L dissolving with hydrochloric acid obtained by step C, after solution is heated to boiling, holding boiling 10~
20min is filtered after solution is cooling, and filter cake is washed, dries, and obtains vanadic anhydride.
2. according to claim 1 utilize the method for preparing vanadium product containing vanadium leachate, it is characterised in that: in step A, institute
Stating containing vanadium concentration in vanadium leachate is 20~60g/L.
3. according to claim 1 or 2 utilize the method for preparing vanadium product containing vanadium leachate, it is characterised in that: step A
In, the time of the standing is 3~5d.
4. according to claim 1 utilize the method for preparing vanadium product containing vanadium leachate, it is characterised in that: in step C, institute
The operation for stating washing is to filter after filter cake is no less than 5min with deionized water washing by soaking, then washed not with soaked in absolute ethyl alcohol
Less than being filtered after 5min.
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| CN109279653A (en) * | 2018-12-07 | 2019-01-29 | 攀钢集团攀枝花钢铁研究院有限公司 | The method for preparing high purity vanadic anhydride |
| CN109292817A (en) * | 2018-12-07 | 2019-02-01 | 攀钢集团攀枝花钢铁研究院有限公司 | The method for preparing ammonium metavanadate |
| CN110010208B (en) * | 2019-04-22 | 2023-02-28 | 东北大学 | V 2 O 5 -CaO-Cr 2 O 3 Method for establishing ternary system phase diagram |
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| CN102167400A (en) * | 2011-03-18 | 2011-08-31 | 中南大学 | Method for preparing vanadium pentoxide from vanadium-containing solution |
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| CN107739825A (en) | 2018-02-27 |
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Application publication date: 20180227 Assignee: SICHUAN PAN YAN TECHNOLOGY Co.,Ltd. Assignor: Chengdu advanced metal material industry technology Research Institute Co.,Ltd. Contract record no.: X2024980003062 Denomination of invention: A method for preparing vanadium products using vanadium containing leaching solution Granted publication date: 20190517 License type: Exclusive License Record date: 20240322 |
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