Preparation method of ultrahigh-purity niobium oxide and prepared ultrahigh-purity niobium oxide

An ultra-high-purity niobium oxide technology, applied in chemical instruments and methods, inorganic chemistry, niobium compounds, etc., can solve the problem that high-purity niobium oxide cannot fully meet market demand, and achieve good separation effect of tantalum and niobium, easy operation, The effect of process technology stability

Active Publication Date: 2015-03-25
JIUJIANG TANBRE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Apparently the above-mentioned high-purity niobium o

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Example 1 Preparation of Ultra-high Purity Niobium Oxide

[0051] 1. Acidity adjustment:

[0052] (1) The raw material of fluoroniobic acid is 850L. After measurement, the total oxide concentration is expressed as (Ta+Nb) 2 o 5 Calculated as 155g / L, the molar concentration of hydrofluoric acid is 2.8moL / L, and the molar concentration of sulfuric acid is 1.3moL / L, put it into the acid adjustment tank;

[0053] (2) Through calculation, 138.78L of chemically pure concentrated hydrofluoric acid and 146.72L of chemically pure concentrated sulfuric acid need to be added;

[0054] (3) Add the calculated concentrated hydrofluoric acid and concentrated sulfuric acid into the acid adjustment tank, start stirring for 30 minutes, the total volume of the prepared fluoroniobic acid feed solution is 1135.50L, and the total oxide concentration is (Ta+Nb) 2 o 5 Calculated as 116.02g / L, the molar concentration of hydrofluoric acid is 7.2moL / L, and the molar concentration of sulfuric...

Embodiment 2

[0082] Example 2 Preparation of Ultra-high Purity Niobium Oxide

[0083] 1. Acidity adjustment:

[0084] (1) The raw material volume of fluoroniobic acid is 1120L. After measurement, the total oxide concentration is expressed as (Ta+Nb) 2 o 5 Calculated as 161g / L, the molar concentration of hydrofluoric acid is 2.5moL / L, and the molar concentration of sulfuric acid is 1.6moL / L, put it into the acid adjustment tank;

[0085] (2) Through calculation, 192.87L of chemically pure concentrated hydrofluoric acid and 164.43L of chemically pure concentrated sulfuric acid need to be added;

[0086] (3) Add the calculated concentrated hydrofluoric acid and concentrated sulfuric acid into the acid adjustment tank, start stirring for 60 minutes, the total volume of the prepared fluoroniobic acid feed solution is 1477.30L, and the total oxide concentration is (Ta+Nb) 2 o 5 Calculated as 122.06g / L, the molar concentration of hydrofluoric acid is 7.2moL / L, and the molar concentration o...

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Abstract

The invention discloses a preparation method of ultrahigh-purity niobium oxide. The preparation method comprises the steps of acidity regulation, extraction separation, neutralization, precipitation, drying and calcining by taking a fluoroniobic acid solution as a raw material. In the extraction separation step, sec-octyl alcohol is used for extracting the regulated niflumic acid material liquid to obtain an organic phase; subsequently the organic phase is pickled by a pickling agent; finally the pickled organic phase is re-extracted by an anti-niobium agent to obtain the ultrahigh-purity niobium oxide. The invention also provides the ultrahigh-purity niobium oxide prepared by the method; the percentage composition of Nb2O5 is larger than or equal to 99.995%; the content of each impurity satisfies the regulations of the standard YS/T548-2007 on product grades F Nb2O5-048 and F Nb2O5-045.

Description

technical field [0001] The invention belongs to the field of metal chemical smelting, and in particular relates to a method for preparing ultra-high-purity niobium oxide and the ultra-high-purity niobium oxide prepared by the method. Background technique [0002] High-purity niobium oxide (99.99%) is an important raw material and functional material for the high-tech new material industry. It is used to prepare lithium salt crystals (lithium niobate) and wafers. Sensing technology, especially military radar, electronic countermeasures, navigation and other cutting-edge technology fields have been widely used. In the current industry standard YS / T548-2007, the product grade of high-purity niobium oxide is FNb 2 o 5 -04, where F means powder, Nb 2 o 5 Indicates the molecular formula of niobium pentoxide (niobium oxide), and 04 indicates that the purity of the product is 99.99%. [0003] In the prior art, the preparation of the high-purity niobium oxide usually takes ferro...

Claims

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Application Information

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IPC IPC(8): C01G33/00
CPCC01G33/00
Inventor 匡国珍周火根杨继红张浩
Owner JIUJIANG TANBRE
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