Manufacture of copper arsenite and application of the same

A copper arsenite, reaction technology, applied in the direction of arsenate/arsenite, process efficiency improvement, photography process, etc., can solve the problem of high solubility of extraction agent, cumbersome treatment process, long follow-up process of chemical precipitation method, etc. problem, to achieve the effect of improving physical quality and chemical quality, improving physical and chemical quality, and remarkable removal effect

Active Publication Date: 2008-01-23
CENT SOUTH UNIV +1
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although electrodeposition copper removal and arsenic removal have made great progress, there are still the following disadvantages: 1) using insoluble anode electrolysis, low current efficiency and high energy consumption; 2) when the concentration of copper ions in the solution is reduced to a certain value, the cathode It will precipitate highly toxic arsine gas; 3) black copper with high content of arsenic, antimony, and bismuth circulates in the smelting and electrolytic refining system, and the arsenic, antimony, and bismuth cannot be completely opened in the form of products; 4) copper ions in the electrolyte Depletion, high acid content, it is difficult to achieve copper and acid balance even through reverse dis

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  • Manufacture of copper arsenite and application of the same

Examples

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Embodiment 1

[0023] Example 1: Weigh 40g of arsenic trioxide and add it to 800mL of sodium hydroxide solution with a concentration of 1mol / L. After stirring for 1 hour, add concentrated sulfuric acid to adjust the pH value of the solution to 8.0, add 150g of copper sulfate pentahydrate, stir to dissolve, and add 6mol / L sodium hydroxide solution to adjust the pH value of the solution to 6.0, stir and react at this acidity for 1 hour and then filter to obtain green copper arsenite, bake it at 110°C for 8 hours to obtain dry copper arsenite, its chemical formula is Cu 5 As 4 o 12 h 2 .

[0024] Take 20g of copper arsenite and add it into 1L of copper electrolyte, stir and react at 65°C for 8h, then filter.

[0025] The comparison of electrolyte composition before and after purification is shown in Table 1.

[0026] Table 1 Composition / g·L of electrolyte before and after purification -1

[0027] the element

[0028] It can be seen from Table 1 that the removal rates of Sb and...

example 2

[0029] Example 2: Weigh 200kg of arsenic trioxide and add to 4m 3 Concentration is in the sodium hydroxide solution of 1mol / L, after stirring for 2 hours, add concentrated sulfuric acid to adjust the pH value of the solution to 7.0, add 800kg copper sulfate pentahydrate, stir and dissolve, add 6mol / L sodium hydroxide solution to adjust the pH value of the solution 6.8, stirred and reacted at this acidity for 2 hours, then settled and washed 4 times, then filtered with a belt filter, dried and packaged.

[0030] Take 2100kg of copper arsenite prepared by the above method and add it to the electrolytic cell in batches, and inject it into the 40m 3 In the copper electrolyte, the dissolved electrolyte flows into the low-level tank, and is pumped into the high-level tank by the circulation pump and into the filter by the circulation pump, and the circulation is repeated for 16 hours. The filter capacity is to filter once every 4 hours. The circulation temperature is 63~65℃, and th...

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Abstract

A method for preparing the cupric arsenite is provided. Water is firstly added in the reactor, and sodium hydroxide or potassium hydroxide lye is added in accordance with the 0.5mol/L to 5mol/L quantity volume concentration of matters and is stirred to dissolve. The arsenic trioxide is added in accordance with the mol ratio of 3 : 2 to 3 : 1 between the hydroxyl and the arsenic of the arsenic-alkali and the pH value of the solution is adjusted to 6.0 to 10.. Under 0 DEG C. to 40 DEG C., the copper sulfate solid is added in accordance with the mol ratio of 1 : 1 to 2 : 1 between the copper and the arsenic. The caustic lye is added and the pH value of the solution is adjusted to 6.0 to 10. reversely. The cupric arsenite is gained after filtering and washing and is repeatedly washed by clear water and is added in the copper electrolyte or the decoppering final solution; the sedimentation containing As, Sb and Bi produced after reaction is filtered and removed and the removal rate of the Sb and Bi impurities in the copper electrolyte highly reaches 50 per cent to 70 per cent. The cupric arsenite added in the copper electrolyte is characterized by strong purification capacity, simple process and low cost.

Description

technical field [0001] The technical invention relates to the preparation of copper arsenite and the application of copper arsenite in the purification of copper electrolyte. Background technique [0002] Arsenic and arsenic compounds are toxic, but they are also important industrial raw materials. How to deal with and utilize arsenic and its compounds has always been a difficult problem for smelters at home and abroad. [0003] In the 18th century, the Swedish chemist Scheler first discovered copper arsenite and named it Scheler Green, which was used as a green pigment. In the middle of the 19th century, a pesticide with copper arsenite as the main component began to be used and became the first registered pesticide in the world. [0004] The traditional copper electrolyte purification method is electrowinning copper removal and arsenic removal. In recent years, researchers around the world have made some improvements on this basis, such as continuous decopper and arseni...

Claims

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Application Information

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IPC IPC(8): C01G28/02C22B3/44C22B15/00C25C1/12
CPCY02P10/20
Inventor 郑雅杰肖发新王勇王根鲍霞杰
Owner CENT SOUTH UNIV
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