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Harmlessness method for treating arsenic in antimony oxide

A technology of harmless treatment and antimony oxide powder, applied in chemical instruments and methods, inorganic chemistry, alkali metal compounds, etc., can solve the problems of easy environmental pollution by dearsenic liquid and antimony oxide powder environmental pollution, and achieve the adaptability of raw materials. Wide, safe production, short process effect

Inactive Publication Date: 2014-01-01
CHENZHOU CITY JINGUI SILVER IND CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional fire and wet treatment of antimony oxide powder is easy to cause environmental pollution
[0003] On May 28, 1997, the Chinese invention patent application publication number CN 1150605A disclosed a process for removing lead, selenium and arsenic in the smelting of lead-containing antimony ore. During the smelting process, the antimony oxide powder is soaked with nitric acid or fluosilicic acid to effectively remove the lead, selenium, and arsenic contained in the antimony ore; but the treatment of the arsenic removal solution is easy to pollute the environment

Method used

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  • Harmlessness method for treating arsenic in antimony oxide

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Embodiment 1

[0026] In this example, 200 g of antimony oxide powder contains antimony: 58.33, arsenic: 5.36, and lead: 10.41. When the mixture is leached, the liquid-solid ratio is 4:1, sodium sulfide 50g, sodium hydroxide 60g, temperature 95℃, stirring reaction for 3h, arsenic leaching rate is 99.50%, antimony 98.91%. The amount of hydrogen peroxide added to the leaching solution is 1.2 times the mass of arsenic and antimony in the solution. At room temperature, the stirring reaction time is 1.5h, and the antimony precipitation rate is 99.91%. Pour pure oxygen into the filtered oxidizing solution, the temperature is 90 °C, the amount of copper sulfate added is 3 times the mass of arsenic in the solution, and the reaction is stirred for 1 h. The copper arsenate precipitate is filtered, washed, and baked at 75 °C for 1.5 h, 35.7 g of copper arsenate was obtained, and the product composition (%) was copper: 32.1 and arsenic 28.3.

Embodiment 2

[0028] The antimony oxide powder in this embodiment is 200 g, containing 60.12 antimony, 5.87 arsenic, and 9.79 lead. When the mixture is leached, the liquid-solid ratio is 5:1, sodium sulfide 65g, sodium hydroxide 75g, temperature 90℃, stirring reaction for 3h, arsenic leaching rate is 99.85%, antimony 99.02%. The amount of hydrogen peroxide added to the leaching solution was 1.3 times the mass of arsenic and antimony in the solution. At room temperature, the reaction was stirred for 1.5 hours, and the antimony precipitation rate was 99.95%. Pour pure oxygen into the filtered oxidizing solution, the temperature is 93 °C, the amount of copper sulfate added is 2.8 times the mass of the solution containing arsenic, and the reaction is stirred for 1 hour. 36.4g copper arsenate, the product composition (%) is copper: 31.7, arsenic 29.0.

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Abstract

The invention relates to a harmlessness method for treating arsenic in antimony oxide, and belongs to the fields of non ferrous metal wet method metallurgy and chemical engineering. The method comprises carrying out selective leaching on antimony oxide and oxidizing to obtain an oxidation-fluid containing arsenic, and adding oxygen and copper sulphate to synthesize copper arsenate. The synthesized copper arsenate can be used for preparation of a wood preservative. The method has the advantages of simpleness, explicitness, strong adaptability of raw materials, small equipment requirement, low production cost and solution of arsenic harm.

Description

technical field [0001] The present invention relates to a method for removing arsenic, more specifically, relates to a method for harmless treatment of arsenic in antimony oxide powder, which uses arsenic in antimony oxide powder to prepare copper arsenate, which belongs to non-ferrous metal hydrometallurgy and chemical industry. technical background [0002] Antimony oxide powder: Molecular formula: Sb 2 o 3 Chinese name: antimony white powder, antimony trioxide; antimony oxide powder is an important chemical raw material, and there are serious problems of arsenic damage when processing this material. Arsenic and arsenic compounds are highly toxic substances. Finding an effective arsenic removal method that can ensure a high recovery rate of the main valuable metals in arsenic-containing materials is beneficial to better recovery of valuable metals and prevention of arsenic pollution to the environment. is of great significance. The traditional fire and wet treatment of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B30/02C01G28/02C01D5/00
CPCY02P10/20
Inventor 粟明辉谢兆凤蒋朝金黄海飞刘万里覃小龙谭霖柴承平
Owner CHENZHOU CITY JINGUI SILVER IND CO LTD
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