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Method for preparing nano zinc oxide and crystal whisker zinc oxide by using industrial zinc sulfate as raw material

A nano-zinc oxide and zinc sulfate technology, applied in the direction of zinc oxide/zinc hydroxide, chemical instruments and methods, nanotechnology, etc., can solve the problem of impurity removal measures that have not been considered, the effect of impurity removal and zinc recovery rate, fluorine Problems such as secondary pollution of ions are outstanding, and the effects of superior product performance, good impurity removal effect, and high total zinc yield are achieved.

Active Publication Date: 2009-10-21
TSINGHUA UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Manganese removal by oxidation method, fluorination method or pickling method for magnesium removal can receive better impurity removal effect, but the above methods have the following problems: (1) the impurity removal measures when manganese and magnesium exist simultaneously have not been considered; (2) The impurity removal effect and zinc recovery rate are not considered at the same time; (3) Although the effect of fluoride magnesium removal method is good, the problem of secondary pollution of fluoride ions to water is prominent

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  • Method for preparing nano zinc oxide and crystal whisker zinc oxide by using industrial zinc sulfate as raw material
  • Method for preparing nano zinc oxide and crystal whisker zinc oxide by using industrial zinc sulfate as raw material
  • Method for preparing nano zinc oxide and crystal whisker zinc oxide by using industrial zinc sulfate as raw material

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Embodiment 1

[0031] The method of preparing nano-zinc oxide and whisker zinc oxide with industrial zinc sulfate as raw material, using simulated industrial zinc sulfate solution containing manganese and magnesium impurities as raw material, first adopts oxidation method to remove manganese, neutral complexation magnesium dissolution-precipitation zinc method Separation of magnesium and zinc to prepare high-purity and highly dispersed nano-zinc salt precursors, and then prepare whisker zinc oxide with regular morphology by hydrothermal directional growth method, or prepare high-purity nano-zinc oxide by roasting method, process flow diagram Such as figure 1 As shown, the method steps are as follows:

[0032] (1) Take zinc sulfate, manganese sulfate and magnesium sulfate as raw materials and add deionized water to prepare simulated industrial zinc sulfate solution, wherein, zinc sulfate is 0.2 mole / liter, manganese sulfate is 0.01 mole / liter, and magnesium sulfate is 0.1 mole / liter , using ...

Embodiment 2

[0041] The method of preparing nano-zinc oxide and whisker zinc oxide with industrial zinc sulfate as raw material, using simulated industrial zinc sulfate solution containing manganese and magnesium impurities as raw material, first adopts oxidation method to remove manganese, neutral complexation magnesium dissolution-precipitation zinc method Separating magnesium and zinc, thereby preparing a high-purity, highly dispersed nano-zinc salt precursor, and then preparing whisker zinc oxide with regular morphology by hydrothermal directional growth method, or preparing high-purity nano-zinc oxide by roasting method, the method steps as follows:

[0042] (1) Take zinc sulfate, manganese sulfate and magnesium sulfate as raw materials and add deionized water to prepare simulated industrial zinc sulfate solution, wherein, zinc sulfate is 4 moles / liter, manganese sulfate is 0.5 moles / liter, and magnesium sulfate is 2 moles / liter , take potassium hypochlorite as oxidant, add deionized ...

Embodiment 3

[0051] The method of preparing nano-zinc oxide and whisker zinc oxide with industrial zinc sulfate as raw material, using simulated industrial zinc sulfate solution containing manganese and magnesium impurities as raw material, first adopts oxidation method to remove manganese, neutral complexation magnesium dissolution-precipitation zinc method Separating magnesium and zinc, thereby preparing a high-purity, highly dispersed nano-zinc salt precursor, and then preparing whisker zinc oxide with regular morphology by hydrothermal directional growth method, or preparing high-purity nano-zinc oxide by roasting method, the method steps as follows:

[0052] (1) Take zinc sulfate, manganese sulfate and magnesium sulfate as raw materials and add deionized water to prepare simulated industrial zinc sulfate solution, wherein, zinc sulfate is 2 moles / liter, manganese sulfate is 0.05 moles / liter, and magnesium sulfate is 1 mole / liter , with ammonium hypochlorite as oxidant, add deionized w...

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Abstract

The invention relates to a method for preparing nano zinc oxide and crystal whisker zinc oxide by using industrial zinc sulfate as a raw material, which belongs to the technical field of preparation of inorganic chemical materials. The method uses a simulated industrial zinc sulfate solution containing impurities of manganese and magnesium as the raw material, and comprises the following steps: firstly, removing the manganese by adopting an oxidation method, and separating the magnesium and zinc by adopting a neutral complex magnesium-dissolving and zinc-depositing mode so as to prepare a precursor of a nano zinc salt; and secondly, preparing the crystal whisker zinc oxide with a regular shape by using a hydrothermal orientated growth method, or preparing high-purity nano zinc oxide by using a roasting method. The method well meets the prior zinc wet method metallurgical process, and has the advantages of clean and simple process, good impurity removing effect, high zinc total yield, low cost, excellent product performance, high added value and easy industrial popularization. The nano zinc oxide and the crystal whisker zinc oxide prepared by the method have regular shapes and uniform grain size, and can be used as functional packing materials or reinforcing materials applied to the fields of alloy, resin, rubber, ceramics, plastics, coatings, electronics and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic chemical materials, in particular to a method for preparing nanometer zinc oxide and whisker zinc oxide by using industrial zinc sulfate as a raw material. Background technique [0002] my country is a big producer of zinc metal, but the research and development of advanced zinc salt materials has just started. Most of the commercially available products are traditional cheap products (such as zinc chloride, zinc sulfate, zinc carbonate, ordinary zinc oxide, etc.), with excellent performance and added value. High-grade products (such as high-purity nano-ZnO and whisker ZnO) have not been used in large-scale industry so far, which limits the high utilization of zinc resources to a certain extent. [0003] Zinc oxide belongs to the hexagonal crystal system, and its structure is composed of alternating zinc atomic planes and oxygen atomic planes stacked alternately along the c-axis. E...

Claims

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Application Information

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IPC IPC(8): C01G9/02C30B29/16C30B29/62B82B3/00
Inventor 向兰高国史文涛王博一张立召
Owner TSINGHUA UNIV
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