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A kind of controllable preparation method of monodisperse copper oxalate powder

A copper oxalate, monodisperse technology, applied in the preparation of carboxylates, carboxylates, chemical instruments and methods, etc., can solve the problems of easy agglomeration of amorphous precipitated particles, difficult to control the shape well, and difficult to disperse.

Active Publication Date: 2020-11-17
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, copper oxalate is a crystalline substance, and its precipitated crystal morphology is easy to control, while copper hydroxide and basic copper carbonate are mostly amorphous, and the shape is difficult to control well. What is more fatal is that amorphous precipitated particles are easier to agglomerate and difficult to control. separate, separate

Method used

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  • A kind of controllable preparation method of monodisperse copper oxalate powder
  • A kind of controllable preparation method of monodisperse copper oxalate powder
  • A kind of controllable preparation method of monodisperse copper oxalate powder

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Experimental program
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Effect test

Embodiment 1

[0030] Take 1.6 liters of deionized water without adding EDTA, stir to dissolve it completely, and control its pH to 5; then add 200ml of copper salt solution with a concentration of 0.1mol / l, stir for 5-30 minutes, and then add 200ml with a concentration of 0.1 mol / l oxalate solution, stirred for 5 minutes, then allowed to stand at room temperature for 1 hour; sampled and filtered, washed repeatedly to remove impurity ions, and collected solid copper oxalate powder with an average particle size of 2.3 microns. Its typical morphology features are as figure 1 shown.

Embodiment 2

[0032] Take 1.6 liters of deionized water, add 4g of EDTA, stir to dissolve completely, and control its pH to 7; then add 200ml of copper salt solution with a concentration of 0.1mol / l, and stir for 5-10 minutes; then add 200ml with a concentration of 0.1 mol / l oxalate solution, stirred for 5 minutes; stood at room temperature for 1 hour; then sampled and filtered at 10 minutes and 1 hour respectively, after repeated cleaning to remove impurity ions, collected solid copper oxalate powder, sampled and filtered at 10 minutes The average particle diameter of the solid copper oxalate powder is 2.1 microns, and the average particle diameter of the solid copper oxalate powder that is sampled and filtered in 1 hour is 3.1 microns. Its typical morphology features are as follows figure 2 and image 3 shown.

Embodiment 3

[0034] Take 1.6 liters of deionized water, add 4g of EDTA, stir to dissolve it completely, and control its pH to 7; then add 200ml of copper salt solution with a concentration of 0.1mol / l, and stir for 5-30 minutes; then add 200ml with a concentration of 0.1 mol / l oxalate solution, stirred for 2 minutes; stood at room temperature for 1 hour; then sampled and filtered at 10 minutes and 1 hour respectively, after repeated cleaning to remove impurity ions, collected solid copper oxalate powder, sampled and filtered at 10 minutes The average particle diameter of the solid copper oxalate powder is 2.1 microns, and the average particle diameter of the solid copper oxalate powder that is sampled and filtered in 1 hour is 3.1 microns. Its typical morphology features are as follows Figure 4 and Figure 5 shown.

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Abstract

The invention relates to the technical field of preparation of a monodisperse powder material, and provides a controllable preparation method of monodisperse copper oxalate powder. The method comprises the following steps: uniformly mixing a soluble copper salt solution, a soluble oxalate solution and an ethylenediamine tetraacetic acid (EDTA) solution in a molar ratio of 1:1:(0-1):1:5; standing in certain temperature condition; filtering, washing and drying to obtain the monodisperse copper oxalate powder. The method provided by the invention has the following beneficial effects: operation iseasy, monodispersity of copper oxalate is high, large-scale preparation is easy to implement, and preparation can be performed at room temperature; accurate control on the size of copper oxalate particles is realized, and the size can be controlled to 2-4 microns; the monodisperse copper oxalate powder can serve as a precursor and can be subjected to thermal decomposition to obtain copper oxide,cuprous oxide and metal copper powder.

Description

technical field [0001] The invention relates to the technical field of preparation of monodisperse powder materials, in particular to a controllable preparation method of monodisperse copper oxalate powder. Background technique [0002] The controllable preparation of nano- and micro-powder materials is very critical for the properties of various macro-sized and structured materials made from them. The fine powder materials with uniform basic characteristics such as particle size, shape and composition, and good dispersibility, the so-called monodisperse granular materials, are especially favored by the industry. First, the properties of monodisperse powder materials are uniform and consistent, which is conducive to fine, stable, and consistent processing into functional material products; second, the preparation process of monodisperse powder materials is demanding, so its preparation costs are particularly large-scale The preparation cost is relatively high. In addition t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C51/41C07C55/07
CPCC07C51/412C07C55/07
Inventor 黄凯陈兴王成彦
Owner UNIV OF SCI & TECH BEIJING
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