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A kind of method utilizing vanadium slag to prepare ferrous oxalate

A technology of ferrous oxalate and vanadium slag, which is applied in the direction of carboxylate preparation, carboxylate preparation, chemical instruments and methods, etc., to achieve the effects of environmental friendliness, high purity and low price

Active Publication Date: 2021-08-17
PANZHIHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects of existing methods for preparing ferrous oxalate, the technical problem solved by the present invention is to provide a method for preparing ferrous oxalate by utilizing vanadium slag

Method used

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  • A kind of method utilizing vanadium slag to prepare ferrous oxalate
  • A kind of method utilizing vanadium slag to prepare ferrous oxalate
  • A kind of method utilizing vanadium slag to prepare ferrous oxalate

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Embodiment 1

[0050] A kind of method utilizing vanadium slag to prepare ferrous oxalate, its concrete steps are as follows:

[0051] (1) First, the quaternary ammonium salt and oxalic acid dihydrate are placed in a beaker to mix uniformly according to a molar ratio of 1:1 to form a deep eutectic solvent as a leaching agent, wherein the quaternary ammonium salt is choline chloride;

[0052] (2) Then the vanadium slag is added in the deep eutectic solvent (liquid-solid ratio is 1:15), the stirring speed is 400 rpm, the temperature is 333K, and the leaching time is 8h;

[0053] (3) Separating the leached pulp from solid to liquid, adding 4 times the volume of deionized water to the leachate obtained by filtration, and standing for precipitation for 3 hours;

[0054] (4) Finally, the leaching solution after standing and precipitating is filtered, and the generated powder is ultrasonically washed with deionized water, washed with alcohol, and vacuum-dried to obtain the higher-purity ferrous oxa...

Embodiment 2

[0057] A kind of method utilizing vanadium slag to prepare ferrous oxalate, its concrete steps are as follows:

[0058] (1) First, the quaternary ammonium salt and oxalic acid dihydrate are placed in a beaker and mixed uniformly according to a molar ratio of 1:2 to form a deep eutectic solvent as a leaching agent, wherein the quaternary ammonium salt is choline chloride;

[0059] (2) Then the vanadium slag is added in the deep eutectic solvent (liquid-solid ratio is 1:10), the stirring speed is 500 rpm, the temperature is 323K, and the leaching time is 10h;

[0060] (3) Separating the leached pulp from solid to liquid, adding 4 times the volume of deionized water to the leachate obtained by filtration, and standing for precipitation for 5 hours;

[0061] (4) Finally, the leaching solution after static precipitation is filtered, and the generated powder is ultrasonically washed with deionized water, washed with alcohol, and vacuum-dried to obtain the higher-purity ferrous oxala...

Embodiment 3

[0064] A kind of method utilizing vanadium slag to prepare ferrous oxalate, its concrete steps are as follows:

[0065] (1) First, the quaternary ammonium salt and oxalic acid dihydrate are placed in a beaker to mix uniformly according to a molar ratio of 1:1 to form a deep eutectic solvent as a leaching agent, wherein the quaternary ammonium salt is choline chloride;

[0066] (2) Then vanadium slag is added in the deep eutectic solvent (liquid-solid ratio is 1:10), stirring speed is 500 rpm, temperature is 353K, and leaching time is 4h;

[0067] (3) Separating the leached pulp from solid to liquid, adding 4 times the volume of deionized water to the leachate obtained by filtration, and standing for precipitation for 2 hours;

[0068] (4) Finally, the leaching solution after standing and precipitating is filtered, and the generated powder is ultrasonically washed with deionized water, washed with alcohol, and vacuum-dried to obtain the higher-purity ferrous oxalate crystal, wh...

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Abstract

The invention relates to a method for preparing ferrous oxalate by utilizing vanadium slag, and belongs to the technical field of preparing ferrous oxalate for batteries. The technical problem solved by the invention is to provide a method for preparing ferrous oxalate by using vanadium slag. In this method, the quaternary ammonium salt is mixed with oxalic acid to form a deep eutectic solvent; after the vanadium slag is added to the deep eutectic solvent for leaching, solid-liquid separation is obtained to obtain a leaching solution, and deionized water is added to the leaching solution, and the obtained solid is washed, Dry to obtain ferrous oxalate crystals. The method of the present invention uses vanadium slag as a raw material to prepare ferrous oxalate crystals with a relatively high purity particle size of 0.5-2 μm, which have a small particle size, uniform size and high purity, and can be used to synthesize ferrous phosphate, a cathode material for lithium ion batteries. The raw material of lithium has low requirements on equipment, short process flow, and is environmentally friendly. It can realize the comprehensive utilization of valuable metal resources of vanadium slag, and the low eutectic solvent used is environmentally friendly, simple to synthesize, and low in price.

Description

technical field [0001] The invention relates to a method for preparing ferrous oxalate by utilizing vanadium slag, and belongs to the technical field of preparing ferrous oxalate for batteries. Background technique [0002] With the widespread application of lithium-ion batteries in various aspects of the national economy such as electric vehicles and electronic products, the demand for advanced battery materials, especially cathode materials, is also increasing day by day. Lithium iron phosphate has attracted extensive attention and recognition of researchers due to its good safety performance and high rate charge and discharge performance. As a chemical raw material, ferrous oxalate is often widely used in the production of colorants and photosensitive materials for paints, dyes, ceramics, glassware and other materials, and is also a high-quality raw material for the synthesis of lithium iron phosphate. The quality of ferrous oxalate plays a decisive role in the performan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C51/41C07C55/07C01B25/45
CPCC01B25/45C07C51/412C07C55/07
Inventor 张远施明川黄平卢进刘甜甜
Owner PANZHIHUA UNIV
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