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Production method for preparing high-purity niobium oxide by adopting high-stibonium niobium solution and product prepared by production method

A production method and technology of niobium oxide, applied in the preparation of niobium compounds, chemical instruments and methods, niobium compounds, etc., can solve the problems of large content and difficult control of antimony impurities, achieve good economic benefits, meet quality requirements, and achieve ideal effects Effect

Inactive Publication Date: 2015-04-01
JIUJIANG TANBRE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high content of key impurity elements such as antimony in niobium-tantalite ore, it is difficult to control the impurity antimony in the production process. In the production of high-purity oxyniobium products, the content of antimony is mostly above 20ppm

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. Adjustment processing

[0031] After analysis, it is known that the specific conditions of the niobium solution are: total acidity 5.3 n, of which sulfuric acid 2.4 n, hydrofluoric acid 2.9 n, containing nb to Nb 2 o 5 Total: 115.5 g / L, containing Sb: 17mg / L. According to the process requirements, through calculation, the total amount of oxides is controlled to be 4Kg, and the volume of the niobium solution added is 34.6L. 1.73g of ammonium sulfate needs to be added, and 2.26ml of ammonium sulfate saturated solution is taken (at 25°C, the concentration of ammonium sulfate saturated solution is 0.767g / ml) for standby. Put 34.6L of niobium solution into the adjustment treatment container, add 1ml of the saturated ammonium sulfate solution, stir thoroughly for 10 minutes, then add the remaining 1.26ml of the saturated ammonium sulfate solution, stir for 30 minutes, and adjust the reaction.

[0032] 2. Adjust acidity

[0033] Put the adjusted niobium solution into t...

Embodiment 2

[0046] 1. Adjustment processing

[0047] It is known from the analysis that the specific conditions of the niobium solution are: total acidity 5.2 N, including sulfuric acid 2.5 N, hydrofluoric acid 2.7 N, containing nb to Nb 2 o 5 Calculated as 117 g / l, containing Sb: 23 μg / ml. According to the process requirements, through calculation, the total amount of oxides is controlled to be 4Kg, the volume of niobium solution added is 34.2L, 1.71g of ammonium sulfate needs to be added, and 2.23ml of ammonium sulfate saturated solution is taken (at 25°C, the concentration of ammonium sulfate saturated solution is 0.767g / ml) for standby. Put 34.2L of niobium solution into the adjustment treatment container, add 1ml of the saturated ammonium sulfate solution, stir thoroughly for 10 minutes, then add the remaining 1.23ml of the saturated ammonium sulfate solution, stir for 30 minutes, and adjust the reaction.

[0048] 2. Adjust acidity

[0049] Put the adjusted niobium solution into...

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Abstract

The invention discloses a production method for preparing high-purity niobium oxide by adopting high-stibonium niobium solution and a product prepared by the production method. The method comprises the following steps: step 1, adding prepared saturated ammonium sulfate into the high-stibonium niobium solution; regulating; controlling the concentration of the niobium solution to be larger than or equal to 70g / L and controlling the acidity to be larger than or equal to 3N; step 2, regulating the total acidity of the regulated niobium solution to be 13n; step 3, extracting the acidity-regulated niobium solution and taking an organic phase; step 4, performing niobium stripping on the organic phase to prepare a pure niobium solution; step 5, neutralizing and precipitating the pure niobium solution, filtering to obtain niobium hydroxide and drying to obtain niobium hydroxide powder; step 6, calcining niobium hydroxide at the temperature of 900 to 1000 DEG C to prepare high-purity niobium oxide. By adopting the method disclosed by the invention to treat the niobium solution prepared from ores which are high in stibonium content, the stibonium content of a high-niobium product can be controlled to be smaller than or equal to 8.5ppm so as to commendably satisfy the quality requirements of high-purity niobium oxide, relatively good economic benefits are achieved and the utilization value of rare resources is greatly widened.

Description

technical field [0001] The invention belongs to the technical field of production of new rare metal materials, and in particular relates to a production technology for preparing high-purity niobium oxide from a high-antimony-niobium liquid and the produced product. Background technique [0002] High-purity niobium oxide is used for drawing LT (lithium niobate) single crystal for laser, micro-acoustic surface wave, information storage, optical fiber communication, infrared detection, and for special optical glass coating (improving optical performance) and making niobium-based Basic materials in high-tech fields such as superconductors and niobium-based catalysts, which have extremely high requirements for impurity elements. [0003] For a long time, high-purity niobium oxide has been produced using niobium concentrates as raw materials, and the chemical composition indicators in product standards are based on the use of niobium concentrates. Due to the small stock of key imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G33/00
CPCC01G33/003C01P2006/80
Inventor 梁昌明郭永忠张浩
Owner JIUJIANG TANBRE