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Method for extracting solid complex from aqueous solution containing vanadium oxysalt, and obtained solid complex and uses thereof

An oxyacid and aqueous solution technology, which is applied in the direction of organic compound/hydride/coordination complex catalyst, organic compound preparation, amino compound preparation, etc., can solve the problems of restricting the development of battery active materials, high raw material cost, and raw material cost Restrictions and other issues, to achieve the effects of reducing preparation costs, reaction safety, and simple methods

Active Publication Date: 2018-08-03
INST OF PROCESS ENG CHINESE ACAD OF SCI
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Problems solved by technology

[0002] Vanadium is an important metal material, and its reserves in my country rank fourth in the world. More than 10 provinces and cities (districts) in the country have vanadium mineral resources. Vanadium is widely used in many fields. Very good application prospect, recently, a lot of literatures report that vanadic acid and its compound can be used as the cathode material of lithium-ion battery alone or with other materials (G.Xu, H.He, H.Wan, R.Liu, X.Zeng ,D.Sun, X.Huang and H.Wang,Journal of Applied Electrochemistry,2016,46,879-885; S. Sarkar,A.Bhowmik,J.Pan,M.D.Bharadwaj and S.Mitra,Journal of Power Sources,2016,329,179- 189; A. Ottmann, G.S. Zakharova, B. Ehrstein and R. Klingeler, Electrochimica Acta, 2015, 174, 682-687; S.-S. Cao, J.-F. Huang, H.-B. Ouyang, L.- Y.Cao,J.-Y.Li and J.-P.Wu,Materials Letters,2014,126,20-23.) However, the high cost of raw materials restricts its further development as a battery active material
The same situation also occurs in other application fields of vanadium. For example, vanadium also has good application prospects in the field of photocatalysis (R.Li, F. Zhang, D.Wang, J.Yang, M.Li, J.Zhu, X.Zhou, H.Han and C.Li, Nature Communications, 2013, 4, 1432; G.Xi and J.Ye, Chemical Communications, 2010, 46, 1893-1895.), but the cost of raw materials is still limiting its main reason for development

Method used

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  • Method for extracting solid complex from aqueous solution containing vanadium oxysalt, and obtained solid complex and uses thereof
  • Method for extracting solid complex from aqueous solution containing vanadium oxysalt, and obtained solid complex and uses thereof
  • Method for extracting solid complex from aqueous solution containing vanadium oxysalt, and obtained solid complex and uses thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0076] A method for preparing a battery material precursor from a vanadium-containing aqueous solution, comprising the steps of:

[0077] (1) Prepare 0.02mol / L NaVO 3 Add 50mL of aqueous solution, add sulfuric acid to adjust the pH to 2.0; add 50mL of 0.02mol / L octadecylamine solution (solvent is toluene).

[0078] (2) Pour the above two solutions into a 200mL beaker, and stir with a magnet for 30min at room temperature;

[0079] (3) After the reaction in step (2) is completed, the solution is allowed to stand for 30 min, and then the organic phase is separated.

[0080] (4) Filter the organic phase, wash 3 times with ethanol, then 3 times with water, and 1 time with ethanol, and then dry the sample in a common oven at 60°C to obtain a solid sample, that is, a solid complex.

[0081] Using the solid complex as a precursor to prepare battery positive active materials, the specific process is:

[0082] Put the organic phase separated in step (3) directly into a hydrothermal k...

Embodiment 2

[0093] A method for preparing a battery material precursor from a vanadium-containing aqueous solution, comprising the steps of:

[0094] (1) Use the actual vanadic acid leaching solution, its pH=4, containing vanadium 15g / L, chromium 3g / L, and other small amount of impurities; add 0.2mol / L octadecylamine solution (solvent is kerosene).

[0095] (2) Take 100mL of the water phase (i.e. the actual vanadic acid leaching solution), 200mL of the organic phase (i.e. the octadecylamine solution), pour it into a 500mL separatory funnel, and place it in a shaker at 25°C for 30 minutes;

[0096] (3) After the reaction in step (2) is completed, the solution is allowed to stand for 30 min, and then the organic phase is separated.

[0097] (4) Filter the organic phase, wash 3 times with ethanol, then wash 3 times with water, and wash 1 time with ethanol, and then dry the sample in an ordinary oven at 60°C to obtain the final solid product, that is, the solid complex .

[0098] The solid ...

Embodiment 3

[0104] Divide 0.02mol / L NaVO 3 The aqueous solution is replaced by 0.04mol / L KVO 3 aqueous solution, and octadecylamine is replaced by dodecylamine, other preparation methods and conditions are the same as in Example 1.

[0105] A solid complex containing vanadium can also be prepared through this embodiment, and a vanadium-containing battery can be prepared by using the complex, and it can also be directly used as a catalyst or used to prepare a composite catalyst for photocatalysis.

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Abstract

The present invention relates to a method for extracting a solid complex from an aqueous solution containing vanadium oxysalt, and the obtained solid complex and uses thereof. The method comprises: 1)carrying out a reaction on an aqueous solution containing vanadium oxysalt and having the pH value of 2-4, and an organic solvent containing aliphatic linear primary amine (the mixture comprising anyone or at least two selected from isopropylamine, n-octylamine, dodecylamine, hexadecylamine and octadecylamine); 2) separating the aqueous phase and the organic phase; and 3) carrying out solid-liquid separation on the organic phase to obtain the solid complex. According to the present invention, the method is suitable for prepared vanadium-containing aqueous solutions, industrial wastewater orvanadium-containing leaching solutions, and can achieve the rational application of the secondary resources; and the obtained solid complex can be used as the novel environmental engineering functional material for preparing battery precursors, or can be directly used as the catalyst or can be compounded with a carrier to obtain a composite catalyst for the photocatalytic degradation of organic matters, such that the preparation cost of the vanadium-containing material is reduced, and the good application prospect is provided.

Description

technical field [0001] The invention belongs to the field of metallurgical environmental engineering, and relates to a method for extracting a solid complex from an aqueous solution containing vanadium-containing oxyacid radicals, the obtained solid complex and its use, in particular to a method for extracting a solid complex from an aqueous solution containing vanadium-containing oxyacid radicals A method for extracting solid complexes from extracts, the solid complexes obtained from the extraction and use as battery material precursors or photocatalytic materials to degrade organic matter. Background technique [0002] Vanadium is an important metal material, and its reserves in my country rank fourth in the world. More than 10 provinces and cities (districts) in the country have vanadium mineral resources. Vanadium is widely used in many fields. Very good application prospect, recently, a lot of literatures report that vanadic acid and its compound can be used as the catho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C209/00C07C211/07C07C211/06B01J31/36H01M4/58
CPCH01M4/5825C07C209/00B01J31/0238B01J31/36B01J35/39C07C211/07C07C211/06Y02E60/10
Inventor 宁朋歌温嘉玮曹宏斌
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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