Method for recycling waste mercury sulfate reagent

A recovery method and waste sulfuric acid technology, applied in separation methods, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems such as high cost and complicated mercury sulfate treatment process

Inactive Publication Date: 2020-10-23
SHENYANG ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of complicated and high-cost mercuric sulfate treatment process, and provide a method for recovering waste mercuric sulfate reagent, which is simple in operation, low in treatment cost, realizes the recovery of elemental mercury, and has strong applicability

Method used

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  • Method for recycling waste mercury sulfate reagent

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Take 5g of waste mercuric sulfate reagent and add it to 1L of deionized water (temperature 80°C), stir to dissolve, then move it into a 2L reaction kettle, add 2.5g of Zn powder to it, stir evenly, and react at a controlled temperature of 50°C for 0.2h.

[0019] Cool to room temperature at the end of the reaction to generate metal crude Hg and ZnSO 4 solution, the metal crude Hg is filtered and purified to obtain the elemental mercury product, and the purity of mercury is 98.42% after testing.

Embodiment 2

[0021] Take 5g of waste mercuric sulfate reagent and add it to 1L of deionized water (temperature 80°C), stir to dissolve, then move it into a 2L reaction kettle, add 2.5g of Fe powder to it, stir evenly, and react for 0.2h at a controlled temperature of 50°C.

[0022] Cool to room temperature at the end of the reaction to generate metal crude Hg and FeSO 4 solution, the crude metal Hg is filtered and purified to obtain the elemental mercury product, and the purity of mercury is 97.78% after testing.

Embodiment 3

[0024] Take 5g of waste mercuric sulfate reagent and add it to 1L of deionized water (temperature 80°C), stir to dissolve, then move it into a 2L reactor, add 4g of Zn powder to it, stir evenly, and react at a controlled temperature of 80°C for 0.5h.

[0025] Cool to room temperature at the end of the reaction to generate metal crude Hg and ZnSO 4 solution, the metal crude Hg is filtered and purified to obtain the elemental mercury product, and the purity of mercury is 98.73% after testing.

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Abstract

The invention relates to the technical field of mercury sulfate reagent recovery, in particular to a method for recycling a waste mercury sulfate reagent. The technical points comprise the following steps: 1) Mixing and replacing reaction: adding the waste mercury sulfate reagent into a reactor and adding a certain amount of zinc powder (Zn) or iron powder (Fe), stir uniformly to fully dissolve the zinc powder and iron powder, controlling a reaction temperature and time, occurring a replacing reaction in the reactor, and obtaining an elemental mercury product after purification; and 2) Treatment and discharging: carrying out condensation and activated carbon adsorption treatment to mercury-containing waste gas produced in step 1), discharging after reaching the standard, carrying out precipitation treatment to the wastewater produced in step 1), and discharging after reaching the standard. With simple operation and low processing cost, the recovery of the elemental mercury is realized,and the applicability is strong.

Description

technical field [0001] The invention relates to the technical field of mercury sulfate reagent recovery, in particular to a method for recovering waste mercury sulfate reagent. Background technique [0002] At present, the pollution of mercury-containing wastewater has become one of the global environmental problems. As a country that produces primary mercury, due to people's improper treatment of mercury, the water contains mercury and pollutes the environment. Among them, the sources of mercury are mainly the production of mercury mines, chlor-alkali chemical plants, non-ferrous metal smelters, pesticide plants, batteries, fluorescent tubes, and thermometers. In addition, pharmaceuticals, cosmetics, and hospital laboratories also have a certain amount of mercury-containing wastewater. emission. [0003] Mercury sulfate, as a toxic substance that is frequently used in batteries, factory production and laboratories, etc. and contains high mercury content, is more harmful to...

Claims

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Application Information

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IPC IPC(8): C22B43/00C22B7/00C02F9/04B01D53/00B01D53/04C02F101/20
CPCC22B43/00C22B7/006C02F1/705C02F1/52B01D53/002B01D53/04C02F2101/20
Inventor 李宝磊祁国恕侯海盟赵岩曾乐孔德勇闫向阳
Owner SHENYANG ACAD OF ENVIRONMENTAL SCI
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