Method for preparing zinc oxalate through zinc oxide dust and method for preparing nanometer zinc oxide

A technology of zinc oxalate and zinc oxide, applied in the directions of zinc oxide/zinc hydroxide, chemical instruments and methods, preparation of organic compounds, etc., can solve the problems of inability to realize iron recycling, complicated production operation, high production cost, and achieve recycling The effect of high added value of products, simple process and high efficiency recovery

Inactive Publication Date: 2019-10-22
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is complicated to remove iron
Therefore, the direct treatment of zinc oxide fumes using traditional techniques involves complicated production op

Method used

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  • Method for preparing zinc oxalate through zinc oxide dust and method for preparing nanometer zinc oxide
  • Method for preparing zinc oxalate through zinc oxide dust and method for preparing nanometer zinc oxide
  • Method for preparing zinc oxalate through zinc oxide dust and method for preparing nanometer zinc oxide

Examples

Experimental program
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Effect test

example 1

[0039] (1) Prepare quaternary ammonium salt and oxalic acid according to the molar ratio of 1:1 to make oxalic acid-based deep eutectic solvent.

[0040] (2) Add zinc oxide dust (51% zinc content) into the deep eutectic solvent prepared in step (1) according to the solid-to-liquid ratio of 1:20, stir and leaching at 50°C for 6 hours, and pour into the leaching solution Add distilled water, wherein the volume ratio of leachate and distilled water is 1:10, stir evenly and let it stand for 10 minutes, and obtain a filter residue rich in zinc oxalate through solid-liquid separation.

[0041] (3) Add the zinc oxalate-rich filter residue obtained in step (2) to the newly configured oxalic acid-based deep eutectic solvent at a ratio of 1:10, stir and dissolve at a temperature of 70°C for 2 hours, and then dissolve it at a temperature of 50°C Replace the copper and lead ions in the solution with zinc flakes, filter to obtain the metal mixture filter residue and filtrate of copper and ...

example 2

[0043] (1) Prepare quaternary ammonium salt and oxalic acid according to the molar ratio of 1:1 to make oxalic acid-based deep eutectic solvent.

[0044] (2) Add zinc oxide dust (61% zinc content) into the deep eutectic solvent prepared in step (1) according to the solid-to-liquid ratio of 1:20, stir and leach for 8 hours at 70°C, and add to the leachate Distilled water was added to the mixture, and the volume ratio of leachate and distilled water was 1:20. After stirring evenly, it was left to stand for 20 minutes, and a filter residue rich in zinc oxalate was obtained by solid-liquid separation.

[0045] (3) Add the zinc oxalate-rich filter residue obtained in step (2) into the newly prepared oxalic acid-based deep eutectic solvent at a ratio of 1:10, stir and dissolve at 70°C for 2 hours, and then add zinc oxalate at 50°C Replace the copper and lead ions in the solution, filter to obtain the copper and lead metal mixture filter residue and filtrate, add distilled water 5 ti...

example 3

[0047] (1) Prepare quaternary ammonium salt and oxalic acid according to the molar ratio of 1:1 to make oxalic acid-based deep eutectic solvent.

[0048] (2) Add zinc oxide dust (48% zinc content) into the deep eutectic solvent prepared in step (1) according to the solid-to-liquid ratio of 1:30, stir and leach for 6 hours at 80°C, and add to the leachate Distilled water was added to the mixture, and the volume ratio of leachate and distilled water was 1:20. After stirring evenly, let it stand for 10 minutes. After solid-liquid separation, a filter residue rich in zinc oxalate was obtained.

[0049] (3) Add the zinc oxalate-rich filter residue obtained in step (2) into the newly prepared oxalic acid-based deep eutectic solvent at a ratio of 1:10, stir and dissolve at 80°C for 1 hour, and then add zinc oxalate at 70°C Replace the copper and lead ions in the solution, filter to obtain the copper and lead metal mixture filter residue and filtrate, add distilled water 10 times its ...

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Abstract

The invention provides a method for preparing zinc oxalate through zinc oxide dust and a method for preparing nanometer zinc oxide. The method for preparing the zinc oxalate comprises the following steps: adding the zinc oxide dust into a deep eutectic solvent formed by mixing quaternary ammonium salt and oxalic acid, and performing agitation leaching; adding water into leachate, uniformly mixingand then leaving the leachate to stand, and performing solid-liquid separation, so as to obtain filter residue; mixing the filter residue and the deep eutectic solvent, so as to obtain an intermediatesolution; ensuring that a zinc sheet and the intermediate solution are subjected to replacement reaction, and filtering a solution obtained after the replacement reaction, so as to obtain filtrate; extracting zinc oxalate from the filtrate. The method for preparing the nanometer zinc oxide comprises the following step: calcining the zinc oxalate obtained through the method for preparing the zincoxalate through the zinc oxide dust, so as to obtain the nanometer zinc oxide. The methods have the advantages of simple technology, high recovery rate of valuable metal and high additional value of arecycled product.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for preparing zinc oxalate and nanometer zinc oxide by using zinc oxide dust. Background technique [0002] At present, the main way to deal with zinc oxide dust is to remove fluorine and chlorine with multi-chamber furnace, then leaching zinc with sulfuric acid, go through the process of iron removal and solution purification, and then extract zinc by electrodeposition. This method is complicated to remove iron. Therefore, the direct treatment of zinc oxide fumes by traditional techniques involves complex production operations, high production costs, difficulty in effectively separating valuable metal ions, and inability to realize the regeneration and utilization of iron. Contents of the invention [0003] In view of the deficiencies in the prior art, the purpose of the present invention is to solve one or more problems in the above prior art. For example, ...

Claims

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Application Information

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IPC IPC(8): C01G9/03B82Y40/00C07C51/41C07C55/07
CPCB82Y40/00C01G9/03C01P2002/72C01P2004/03C01P2004/64C01P2006/80C07C51/412C07C55/07
Inventor 徐存英王祥华一新张启波汝娟坚李艳李坚
Owner KUNMING UNIV OF SCI & TECH
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