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Method for extracting vanadium from waste vanadium catalyst

A waste vanadium catalyst and extraction method technology, which is applied in the field of vanadium extraction, can solve the problems of low adsorption and resolution rate, complex vanadium extraction production process, and low product purity, so as to improve the adsorption effect, facilitate vanadium precipitation operations, and simplify the process flow Effect

Active Publication Date: 2018-12-18
KAIFENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for extracting vanadium from spent vanadium catalysts with simple process, environmental friendliness and high purity of vanadium products, aiming to solve the complex production process, low adsorption and resolution rate existing in the current vanadium extraction , technical problems of low product purity

Method used

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  • Method for extracting vanadium from waste vanadium catalyst
  • Method for extracting vanadium from waste vanadium catalyst
  • Method for extracting vanadium from waste vanadium catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: Dex-V resin carries out static adsorption of vanadium

[0035] (1) Grind the particle size of the spent vanadium catalyst to 300-370 μm, add water according to the ratio of solid-liquid mass ratio of 1:2.5, soak in water at 100°C for 1.5 hours, and filter to obtain the water-leaching filtrate and water-leaching filter residue , washing the water immersion filter residue with clear water until neutral to obtain the water leaching residue, combining the water immersion filtrate and the washing liquid to obtain the water immersion liquid, collecting the water leaching residue and the water immersion liquid respectively for subsequent use;

[0036] (2) Add H with a mass percentage concentration of 11% to the water leaching residue obtained in the upward step at a liquid-solid ratio of 2.5ml: 1g 2 SO 4 , carrying out reducing acid leaching under the condition that sodium sulfite is the reducing agent, filtering to obtain the reducing acid leaching solution and...

Embodiment 2

[0044] Embodiment 2: Dex-V resin carries out vanadium static adsorption

[0045] The difference from Example 1 is:

[0046] Grinding the waste vanadium catalyst, immersing in water, reducing acid leaching and oxidation to obtain raw material liquid; adjusting its pH value to 2.0, 2.5, 3.0;

[0047] Soak and wash the Dex-V anion exchange resin with deionized water until there is no brown and foam, then soak the Dex-V anion exchange resin with 5% NaOH solution for 12 hours, filter, and wash with deionized water until the effluent is neutral; then Soak the Dex-V anion-exchange resin with 5% HCl solution for 12h and filter it, wash it with deionized water until the effluent is neutral, and finally soak it with a saturated sodium chloride solution to obtain the pretreated Dex-V anion-exchange resin, spare.

[0048] Mix 150ml of raw material solution with 1g of pretreated Dex-V anion exchange resin, and magnetically stir at room temperature for 5h to perform adsorption.

[0049] ...

Embodiment 3

[0052] Embodiment 3: Dex-V resin carries out static adsorption of vanadium

[0053] The difference from Example 1 is:

[0054] Grinding the spent vanadium catalyst, immersing in water, reducing acid leaching and oxidation to obtain a raw material liquid, wherein the content of vanadium is 5.1g / L; adjust its pH value to 2.5;

[0055] Soak and wash the Dex-V anion exchange resin with deionized water until there is no brown and foam, then soak the Dex-V anion exchange resin with 5% NaOH solution for 12 hours, filter, and wash with deionized water until the effluent is neutral; then Dex-V anion exchange resin was soaked in 5% HCl solution for 12 hours, filtered, washed with deionized water until the effluent was neutral, and finally soaked in saturated sodium chloride solution to obtain pretreated Dex-V anion exchange resin.

[0056] 150ml of the raw material solution was mixed with 1.0g of the pretreated Dex-V resin, and magnetically stirred at 30°C and 35°C for 5h for adsorptio...

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Abstract

The invention discloses a method for extracting vanadium from a waste vanadium catalyst. The method includes the following steps that trituration and water logging are carried out on the waste vanadium catalyst; after reduction and oxidation, a feed solution is obtained; the pH value of the feed solution is adjusted to 2.0-3.0; static adsorption and / or dynamic adsorption are / is carried out after mixing Dex-V anion exchange resin, load vanadium resin is obtained; a vanadium containing desorption solution is obtained by leaching the obtained load vanadium resin with a desorption solution; and after adjusting the pH value of the vanadium containing desorption solution to 8-9, ammonium chloride is added, precipitate is obtained, and vanadium pentoxide is obtained after calcining. According tothe method for extracting the vanadium from the waste vanadium catalyst, the process of purification-crude vanadium precipitating-alkali dissolution is saved, tens times enrichment of vanadium concentration is obtained, the technological process is greatly simplified, the production cost is lowered, the adsorption rate, analytical rate and recovery rate for the vanadium are high, product purity ishigh, and environmental protection is achieved.

Description

technical field [0001] The invention relates to the technical field of vanadium extraction, in particular to a method for extracting vanadium from spent vanadium catalysts. Background technique [0002] Vanadium is one of the scarce and important metals in the world, and it is widely used in many fields such as aviation and metallurgy. According to statistics, more than 70% of vanadium is currently produced from vanadium-rich iron slag, waste catalysts, and lime ash; more than 80% of the reactions in the chemical industry require the participation of catalysts, and vanadium-containing catalysts are even more important catalyst series One of them is widely used in the sulfuric acid industry and the synthesis of organic chemical raw materials; however, with the increase in the use time of vanadium-containing catalysts and the impact of environmental factors in the use process, a large amount of spent vanadium catalysts are produced every year in the world. Waste vanadium cata...

Claims

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Application Information

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IPC IPC(8): C22B34/22C22B7/00
CPCC22B34/225Y02P10/20
Inventor 郝喜才娄童芳王明瑞胡海霞李洁
Owner KAIFENG UNIV
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