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Sustained release vulcanizing agent, preparation method thereof, and method of using sustained release vulcanizing agent to remove heavy metals and arsenic from acidic solution

An acid solution, vulcanizing agent technology, applied in chemical instruments and methods, calcium/strontium/barium sulfate, special compound water treatment, etc., can solve the problems of high harm, high cost, low efficiency, etc. Harm, improve utilization, reduce the effect of cost of use

Active Publication Date: 2017-09-22
CHANGSHA HASKY ENVIRONMENTAL PROTECTION TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Various methods for treating arsenic and heavy metals in acidic solutions in the prior art have high cost, low efficiency, H 2 S has defects such as great harm, and the purpose of the present invention is to provide a kind of S 2- Utilize high, no H 2 S-hazardous slow-release vulcanizing agent, especially suitable for the removal of heavy metals and arsenic in acidic solutions

Method used

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  • Sustained release vulcanizing agent, preparation method thereof, and method of using sustained release vulcanizing agent to remove heavy metals and arsenic from acidic solution

Examples

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Effect test

Embodiment 1

[0049] Using this process to treat the sewage acid of a smelter in Chenzhou, the As content of the sewage acid is as high as 17-20g / L, and the Zn content is as high as about 10g / L. Separately configure Fe with a certain ion concentration 2+ , Mn 2+ , Zn 2+ 1mol / L solution respectively, mix evenly according to the molar ratio of 5:1:1, add vulcanizing agent (sodium sulfide) to the mixed solution at a certain temperature (50°C), and add surfactant butyl xanthate Sodium (C 4 h 6 OCSSNa) and sodium dodecylsulfonate at a molar ratio of 1:1, while stirring at a high speed for 20-30 minutes, and filtering to obtain the desired slow-release vulcanizing agent. Add the slow-release vulcanizing agent into the acidic solution, the amount of the added slow-release vulcanizing agent is 1.2 times of the theoretical amount, stir and react for 0.5h, the reaction temperature is 55°C, after the reaction is completed, add flocculant to settle quickly, and filter and separate, It is high-arse...

Embodiment 2

[0055] Using this process to treat the high-arsenic zinc leach solution of a Chenzhou smelter, the As content of the polluted acid is as high as 22.1g / L, and the Zn content is as high as about 128g / L. Separately configure Fe with a certain ion concentration 2+ , Mn 2+ , Zn 2+ 1mol / L solution respectively, mix evenly according to the molar ratio of 5:1:1, add vulcanizing agent (sodium hydrosulfide) to the mixed solution at a certain temperature (50°C), and add surfactant butyl xanthogen A mixture of sodium dodecyl sulfate sodium (C4H6OCSSNa) and sodium dodecylsulfonate with a molar ratio of 1:1, while stirring at high speed for 20-30 minutes, and filtering to obtain the required slow-release vulcanizing agent. Add the slow-release vulcanizing agent into the acidic solution, the amount of the added slow-release vulcanizing agent is 1.2 times of the theoretical amount, stir and react for 0.5h, the reaction temperature is 60°C, after the reaction is completed, add flocculant to ...

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Abstract

The invention discloses a sustained release vulcanizing agent, a preparation method thereof, and a method of using the sustained release vulcanizing agent to remove heavy metals and arsenic from an acidic solution. A sulfur source and a surfactant are added into a solution containing Fe<2+>, Mn<2+>, and Zn<2+> to carry out reactions to obtain the nano-millimeter metal sulfide sol sustained release vulcanizing agent, which can slowly release S<2-> under a strongly acidic condition; the surface activity is guaranteed, at the same time, the utilization rate of S<2-> is improved; the vulcanizing agent is used to remove heavy metals and arsenic from an acidic solution and has the advantages of high removal efficiency, low using amount, and low hydrogen sulfide release amount; the problems that the using amount of a conventional vulcanizing agent is large, the utilization rate is low, and the H2S pollution is severe can be solved, and the method for removing heavy metals and arsenic from an acidic solution has the advantages of simple process and convenient operation and is suitable for industrial production.

Description

technical field [0001] The invention relates to a slow-release vulcanizing agent, in particular to a slow-release vulcanizing agent for purifying heavy metals and arsenic in acidic solutions, and belongs to the technical field of comprehensive utilization of sewage resources. Background technique [0002] Arsenic and its compounds are highly volatile, and more than 30,000 tons of arsenic enter non-ferrous metal dust every year. During the "Twelfth Five-Year Plan" period, the dust containing arsenic increased geometrically. question. Arsenic and metals such as copper, lead, zinc, cobalt, tin, antimony, gold and silver often co-exist together, and part of arsenic inevitably enters the concentrate and enters the smoke dust in the process of non-ferrous metallurgy industry. The most important arsenic-containing soot resources in the pyrometallurgical process of non-ferrous metals include: copper smelting soot, lead smelting soot, tin smelting soot, sub-zinc oxide and high-arsen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/12C02F1/42C01F11/46C02F101/10C02F101/20
CPCC01F11/46C02F1/001C02F1/42C02F1/488C02F1/52C02F9/00C02F2001/007C02F2101/103C02F2101/20C02F2305/04
Inventor 孙伟胡岳华韩海生程鹏飞
Owner CHANGSHA HASKY ENVIRONMENTAL PROTECTION TECH DEV CO LTD
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