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Method for removing trace amount of antimony oxide in coarse bismuth oxide

A bismuth oxide and antimony oxide technology, applied in chemical instruments and methods, inorganic chemistry, bismuth compounds, etc., can solve the problems of long process flow and large loss of raw materials, and achieve short process flow, less consumption of auxiliary materials, and reduced loss of bismuth oxide. Effect

Active Publication Date: 2020-01-17
HENGYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Coarse bismuth oxide in the prior art is produced by a pyrotechnic process, and contains a small amount of Sb due to raw material or process pollution. 2 o 3 , other impurities are extremely low, the traditional method needs to enter the bismuth smelting process to remove antimony again, the process is long, and the loss of raw materials is large

Method used

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  • Method for removing trace amount of antimony oxide in coarse bismuth oxide
  • Method for removing trace amount of antimony oxide in coarse bismuth oxide

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Embodiment 1

[0019] Raw material coarse bismuth oxide (≥99.0%), Sb 2 o 3 : 0.064%, other impurities (such as Zn, Ca, Pb, Cu, etc.) are less than 10ppm, at 90 ℃, coarse bismuth oxide: water = 1:10, stirring for 2h, 1 filter, Sb is reduced to 0.019% , repeat the above operation, Sb is reduced to 0.001%.

Embodiment 2

[0021] Raw material coarse bismuth oxide (≥99.0%), Sb 2 o 3 : 0.96%, other impurities (such as Zn, Ca, Pb, Cu, etc.) are less than 10ppm, at a temperature of 80 ℃, coarse bismuth oxide: lye (sodium hydroxide concentration is 0.5%) = 1:10, stirring for 3h , filtered once, rinsed with water at 60°C for 0.5h, Sb: 0.0008%, Na: 0.0007%.

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Abstract

The invention discloses a method for removing trace amount of antimony oxide in coarse bismuth oxide. The method comprises the steps of after reacting coarse bismuth oxide with water or a dilute alkali solution, filtering, and water washing to obtain the purified bismuth oxide. According to the method, the technical problem that the coarse bismuth oxide needs to be returned to a bismuth refining process in the prior art is solved, and the purification of the bismuth oxide is successfully realized.

Description

technical field [0001] The invention relates to a method for purifying coarse bismuth oxide, in particular to a method for removing trace amounts of antimony oxide in coarse bismuth oxide, and belongs to the technical field of bismuth oxide production. Background technique [0002] Coarse bismuth oxide in the prior art is produced by a pyrotechnic process, and contains a small amount of Sb due to raw material or process pollution. 2 o 3 , other impurities are extremely low, the traditional method needs to enter the bismuth smelting process to remove antimony again, the process is long and the loss of raw materials is large. Contents of the invention [0003] Aiming at the defects in the prior art methods for purifying coarse bismuth oxide, the purpose of the present invention is to provide a method for removing trace amounts of residual antimony oxide in bismuth oxide with high selectivity and depth through water or dilute alkali. The process flow of the method is Short,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G29/00
CPCC01G29/00C01P2004/03
Inventor 卢伟红孙俊彬陈满生谢鑫方中海
Owner HENGYANG NORMAL UNIV
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