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Method for deep separation of vanadium from molybdate by utilizing magnetic iron oxide as adsorbent

A technology of magnetic iron oxide and adsorbent, which is applied in the fields of chemical industry and metallurgy, can solve the problems of difficult solid-liquid separation, achieve good separation effect, simple equipment, and low co-adsorption loss

Active Publication Date: 2016-09-21
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the addition of manganese salts and iron salts in the above method inevitably brings in impurities, and the generated colloidal manganese dioxide and hydrated iron oxide make solid-liquid separation extremely difficult.

Method used

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  • Method for deep separation of vanadium from molybdate by utilizing magnetic iron oxide as adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In vanadium-containing sodium molybdate solution, Mo=50g / L, V=0.5g / L, pH is controlled at 9.0, and newly prepared Fe 3 o 4 Sol, wherein the mass ratio of Fe to vanadium in the solution is 70. The adsorption reaction was carried out under the condition of temperature of 25°C and stirring time of 1 hour. After the reaction, the solid and liquid were completely separated under the action of an external magnetic field for 10 seconds, and the magnetic field strength was 0.35T. The solution contains Mo=48.3 g / L, V=0.012 g / L; the loaded adsorbent is desorbed with 1mol / L NaOH solution, the desorption rate of molybdenum is 95.4%, the desorption rate of vanadium is 98.5%, the adsorbent after desorption can be continue to use. Such as figure 1 Shown is the magnetic performance curve of the prepared adsorbent and the schematic diagram of solid-liquid separation under the action of an external magnetic field after adsorption. It can be seen that the saturation magnetization of t...

Embodiment 2

[0024] In vanadium-containing sodium molybdate solution, Mo=6.8g / L, V=0.1g / L, pH is controlled at 8.0, and new Fe is added 3 o 4 The powder obtained after drying the sol has a mass ratio of Fe to vanadium in the solution of 95. The adsorption reaction was carried out at a temperature of 10°C and a stirring time of 30 minutes. After the reaction, the solid and liquid were completely separated under the action of an external magnetic field for 15 seconds, and the magnetic field strength was 0.6T. The solution contains Mo=6.4 g / L, V=0.008 g / L; the loaded adsorbent uses 1mol / L NH 4 OH solution desorption, the desorption rate of molybdenum is 96.3%, the desorption rate of vanadium is 99.5%, and the adsorbent after desorption can continue to be used.

Embodiment 3

[0026] In the vanadium-containing sodium molybdate solution, Mo=198g / L, V=1 g / L, the pH is controlled at 10.5, and the newly prepared γ-Fe 2 o 3 Sol, wherein the mass ratio of Fe to vanadium in the solution is 62. The adsorption reaction was carried out at a temperature of 35°C and a stirring time of 2 hours. After the reaction, the solid and liquid were completely separated under the action of an external magnetic field for 10 seconds, and the magnetic field strength was 0.5T. The solution contains Mo=190.3 g / L, V=0.019 g / L; the loaded adsorbent is desorbed with 1.5mol / L NaOH solution, the desorption rate of molybdenum is 93.7%, and the desorption rate of vanadium is 97.2%. Can continue to use.

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Abstract

The invention relates to an inorganic substance purifying technology in chemical and metallurgical fields, in particular to a method for the deep separation of vanadium from molybdate by utilizing magnetic iron oxide as an adsorbent. First, magnetic iron oxide fine particles are prepared. Then, the magnetic iron oxide fine particles are added into a molybdate solution containing vanadium and are mixed through stirring. The magnetic iron oxide particles can selectively adsorb vanadium from the solution. After reaction is finished, the loaded adsorbent is separated from the solution under the action of an external magnetic field, so that a pure molybdate solution is obtained. Due to the adoption of the technical scheme, the method has a good molybdenum and vanadium separating effect, the removing rate of the vanadium can reach more than 95%, and the coadsorption loss of the molybdenum is lower than 5%; the magnetic property of the adsorbent is good, and solid-liquid separation can be finished in 10 seconds; and the method is short in process, simple in equipment, low in cost and suitable for large-range popularization.

Description

technical field [0001] The invention relates to the purification technology of inorganic substances in the fields of chemical industry and metallurgy, in particular to a method for deep separation of vanadium in molybdate by using magnetic iron oxide as an adsorbent for the preparation of pure molybdate products. Background technique [0002] At present, due to its excellent physical and chemical properties, the rare metal molybdenum plays an irreplaceable important role in many fields such as national economy, national defense and military industry, and is regarded as a strategic metal that is critical to national security. At present, with the continuous growth of molybdenum demand and the consumption of traditional molybdenum ore resources, non-traditional raw materials such as nickel-molybdenum ore and waste aluminum-based molybdenum catalysts in secondary resources have also become raw materials for molybdenum production. These raw materials all contain trace amounts of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/24C22B3/22C22B34/34C22B34/22
CPCC22B3/22C22B3/24C22B34/22C22B34/34Y02P10/20
Inventor 张家靓胡军涛
Owner UNIV OF SCI & TECH BEIJING