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A method for removing trace amounts of antimony oxide in coarse bismuth oxide

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

Active Publication Date: 2022-04-12
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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  • A method for removing trace amounts of antimony oxide in coarse bismuth oxide
  • A method for removing trace amounts 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 amounts of antimony oxide in coarse bismuth oxide. The method is to react coarse bismuth oxide with water or a dilute alkali solution, filter and wash with water to obtain bismuth oxide. The method avoids The technical problem in the prior art that coarse bismuth oxide needs to be returned to the bismuth refining process was solved, and the purification of bismuth oxide was 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 Patents(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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