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Purification method of industrial grade ammonium metavanadate

An ammonium metavanadate, industrial-grade technology, applied in chemical instruments and methods, vanadium compounds, inorganic chemistry, etc., can solve the problems of difficult control of K, Na and S content, increase production costs, and affect product quality, etc. The effect of understanding, easy operation, and easy industrial production

Active Publication Date: 2019-03-08
KUNMING METALLURGY INST
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  • Claims
  • Application Information

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Problems solved by technology

The problem with this method is that adding NaOH, Na 2 CO 3 , KClO 3 and H 2 SO 4 , may make it difficult to control the K, Na and S content in the product
[0005] Chinese patents CN102531054A and CN102730757A use industrial grade ammonium metavanadate as raw material, dissolve in dilute ammonia water at 80-90°C, and then add impurity removers such as soluble magnesium salt or calcium salt, and the liquid crystallizes after impurity removal to obtain ammonium metavanadate Products, because magnesium salts or calcium salts are not easy to be hydrolyzed and removed under alkaline conditions, there will be entrainment during the crystallization process of ammonium metavanadate, which will affect the quality of the product. In order to obtain high-quality products, secondary or Multiple crystallization, which will undoubtedly increase the production cost
This method has good applicability when the impurities in ammonium metavanadate are mainly insoluble compounds, but there are certain deficiencies in the treatment of slightly soluble compounds in ammonium metavanadate

Method used

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  • Purification method of industrial grade ammonium metavanadate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: as figure 1 Shown, the industrial grade ammonium metavanadate of the present embodiment, its main component is (%): NH 4 VO 389.26, Al 0.037, Cr 0.053, Fe 0.24, Ca 0.26, P 0.18, As 0.14, Si 0.066, Mo 0.48, Cl 0.081, K 0.068, Na 0.36, S 0.002, Pb2 ·6H 2 0.6g, reacted for 30min, then added the mixed solution of 10ml ammonia water and 1.2ml phosphoric acid, added ammonia water to adjust the pH to 7.5-8.0, reacted for 30min, filtered, the filter residue recovered vanadium, and the filtrate entered the next process; Next, add 2mlH 2 o 2 React for 30min, add 12.15gAlCl 3 ·6H 2 O, add ammonia water to adjust the pH to 7.5-8.0, react for 120 minutes, filter, and recover vanadium from the filter residue, and the filtrate enters the crystallization link. After removing impurities, add ammonia water to adjust the pH to 8.5-9.0, stir and crystallize at 50°C for 12 hours, wash the crystallized product with deionized water at the same temperature for 3-4 times, an...

Embodiment 2

[0031] Embodiment 2: the technical grade ammonium metavanadate of the present embodiment, its main component is (%): NH 4 VO 3 89.26, Al0.037, Cr0.053, Fe0.24, Ca0.26, P0.18, As0.14, Si0.066, Mo0.48, Cl0.081, K0.068, Na0.36, S0.002, Pb2 ·6H 2 0.6g, reacted for 30min, then added the mixed solution of 10ml ammonia water and 1.2ml phosphoric acid, added ammonia water to adjust the pH to 7.5-8.0, reacted for 30min, filtered, the filter residue recovered vanadium, and the filtrate entered the next process; Next, add 2mlH 2 o 2 React for 30min, add 12.15gAlCl 3 ·6H 2 O, add ammonia water to adjust the pH to 7.5-8.0, react for 120 minutes, filter, and recover vanadium from the filter residue, and the filtrate enters the crystallization link. After removing impurities, add ammonia water to adjust the pH to 8.5-9.0, stir and crystallize at 50°C for 12 hours, wash the crystallized product with deionized water at the same temperature for 3-4 times, and dry the filter cake at 30-35°...

Embodiment 3

[0032] Embodiment 3: the industrial grade ammonium metavanadate of the present embodiment, its main component is (%): NH 4 VO 3 89.26, Al0.037, Cr0.053, Fe0.24, Ca0.26, P0.18, As0.14, Si0.066, Mo0.48, Cl0.081, K0.068, Na0.36, S0.002, Pb2 ·6H 2 0.6g, reacted for 30min, then added the mixed solution of 10ml ammonia water and 1.2ml phosphoric acid, added ammonia water to adjust the pH to 7.5-8.0, reacted for 30min, filtered, the filter residue recovered vanadium, and the filtrate entered the next process; Next, add 2mlH 2 o 2 React for 30min, add 12.15gAlCl 3 ·6H 2 O, add ammonia water to adjust the pH to 7.5-8.0, react for 120 minutes, filter, and recover vanadium from the filter residue, and the filtrate enters the crystallization link. After removing impurities, add ammonia water to adjust the pH to 8.5-9.0, stir and crystallize at room temperature (20°C) for 12 hours, wash the crystallized product with deionized water at the same temperature for 3-4 times, and dry the f...

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Abstract

The invention discloses an extraction method of industrial grade ammonium metavanadate, and belongs to the technical field of wet metallurgy. The method comprises the following steps: adding hot waterto solve the industrial grade ammonium metavanadate, adding ammonium sulfide to perform vulcanization for a certain time, adjusting the pH value of a solution to be 3.0 to 3.5, performing reaction for 20 to 50min, and filtering, so as to obtain a filtrate number 1; heating the filtrate number 1, adding a certain amount of ferrite reduced high valence state chromium, performing reaction for 20 to120min, adding phosphate, then adjusting the pH value of the solution to be 7.5 to 8.0, performing reaction for 20 to 40min, and filtering, so as to obtain a filtrate number 2; heating the filtrate number 2, adding hydrogen peroxide and oxygen residual Fe2+, performing reaction for 20 to 40min, then adding a certain amount of aluminum salt, adjusting the pH value of the solution to be 7.5 to 8.0,performing reaction for 40 to 150min, and filtering, so as to obtain a filtrate number 3; performing medium-temperature crystallizing, washing and drying on the number 3 filtrate, so as to obtain a high-purity ammonium metavanadate product. The method overcomes the disadvantage in the prior art that anionic and cationic impurities cannot be removed at the same time in one technology, and has the advantages that the technical process is simple and easy to operate, waste liquor cyclic utilization is achieved, and the method is applicable to industrial promotion.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for purifying industrial-grade ammonium metavanadate. Background technique [0002] Vanadium is a rare metal with important economic and strategic significance. It has excellent physical and chemical properties, known as the "vitamin" of metals, and has a wide range of uses in metallurgy, aerospace, chemistry, building materials and electronics industries. Especially in steel production to improve the strength and toughness of steel, about 85% of the world's vanadium is used in the steel industry. In addition, it is also used in some high-tech fields, such as the aerospace industry, the preparation of super alloys and other industries. [0003] Ammonium metavanadate is mainly used as a chemical reagent, catalyst, drier, mordant, etc. It is widely used in the ceramic industry as a glaze, and is also used as a raw material for the production of vanadium pentoxide...

Claims

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Application Information

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IPC IPC(8): C01G31/00
CPCC01G31/006C01P2006/80
Inventor 牟兴兵杨大锦刘俊场付维琴邹维翟忠标田林李俊
Owner KUNMING METALLURGY INST
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