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Method for recovering chlorine and preparing chlorine salt based on solvent extraction and salting-out effect integrated technology

A salting-out effect and extraction technology, applied in chemical instruments and methods, extraction water/sewage treatment, alkali metal chloride, etc., can solve the problems that the separation and interception method stays in the laboratory stage and is difficult to realize industrial application, and achieves cost Low, easy to industrialize, high purity effect

Pending Publication Date: 2021-02-02
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application of the separation and interception method mostly stays in the laboratory stage, and it is difficult to realize industrial application

Method used

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  • Method for recovering chlorine and preparing chlorine salt based on solvent extraction and salting-out effect integrated technology
  • Method for recovering chlorine and preparing chlorine salt based on solvent extraction and salting-out effect integrated technology
  • Method for recovering chlorine and preparing chlorine salt based on solvent extraction and salting-out effect integrated technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] This method of utilizing solvent extraction and salting-out effect integrated technology to efficiently recycle chlorine and prepare chlorine salts is implemented in accordance with figure 1 shown, including the following steps:

[0050] (1) First, detect whether the industrial wastewater contains other metal ions, and if there are metal ions, they need to be removed; filter the wastewater to remove the suspended particles. The chlorine ion concentration of the detected wastewater was 30.96g / L.

[0051] (2) Acidify the organic phase, the organic phase is configured according to the volume ratio, trioctylamine (v.%): isooctyl alcohol (v.%): sulfonated kerosene (v.%)=3:3:4, 1mol / Mix L sulfuric acid with the organic phase, the ratio (O:A)=1:1, the acidification time is 60min, stand still, and separate the phases.

[0052] (3) Extraction, after acidification, the organic phase is mixed with the waste water, the phase ratio (O:A)=3:2 is set, the extraction time is 30min,...

Embodiment 2

[0057] This method of utilizing solvent extraction and salting-out effect integrated technology to efficiently recycle chlorine and prepare chlorine salts is implemented in accordance with figure 1 shown, including the following steps:

[0058] (1) First, detect whether the industrial wastewater contains other metal ions, and if there are metal ions, they need to be removed; in addition, filter the wastewater to remove the suspended particles. The chlorine ion concentration of the detected wastewater was 45.96g / L.

[0059] (2), acidify the organic phase, the organic phase is configured according to the volume ratio, N235 (v.%): isooctyl alcohol (v.%): kerosene (v.%) = 3:2:5, 1mol / L sulfuric acid and organic Phase mixing, phase ratio (O:A)=1:1, acidification time 60min, standing still, phase separation.

[0060] (3) Extraction. After acidification, the organic phase is mixed with waste water, and the ratio (O:A)=3:2 is set. The extraction time is 30 minutes. The initial pH o...

Embodiment 3

[0065] This method of utilizing solvent extraction and salting-out effect integrated technology to efficiently recycle chlorine and prepare chlorine salts is implemented in accordance with figure 1 shown, including the following steps:

[0066] (1) First, detect that the industrial wastewater does not contain metal ions that will form precipitates and hinder the extraction operation, filter to remove the suspended particles, and measure the chlorine ion concentration of the wastewater to be 12.39 g / L.

[0067] (2), acidify the organic phase, the organic phase is configured according to the volume ratio, N235 (v.%): isooctyl alcohol (v.%): kerosene (v.%) = 3:2:5, 1mol / L sulfuric acid and organic Phase mixing, phase ratio (O:A)=1:1, acidification time 30min, standing still, phase separation.

[0068] (3) Extraction. After acidification, the organic phase is mixed with the wastewater, and the phase ratio (O:A)=2:1 is set. The extraction time is 20 minutes. The initial pH of the...

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Abstract

The invention belongs to the technical field of wastewater treatment, and particularly relates to a method for recovering chlorine and preparing chlorine salt based on a solvent extraction and salting-out effect integrated technology. By adopting a solvent extraction method and combining the process steps of wastewater pretreatment, acidification, extraction, reverse extraction and salting-out inthe method, the extraction effect on the ultrahigh-concentration chlorine-containing wastewater is remarkable, and a feasible scheme is provided for treatment of the ultrahigh-concentration industrialchlorine-containing wastewater. In the whole process flow, the cost is reduced to the minimum, the extraction agent is recycled, the purity of the product obtained by salting out is high, the filtered solution returns to the reverse extraction process, and secondary pollution is avoided. By adding the phase modifier, the problems of low extraction rate, layering of the extraction agent and the like caused by high viscosity of the extraction agent are solved, and the extraction agent is easy to obtain, high in phase splitting speed, low in investment, low in cost, convenient to use, safe, reliable and convenient for industrialization.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a method for recovering chlorine and preparing chlorine salt based on the integrated technology of solvent extraction and salting-out effect. Background technique [0002] With the continuous development of industrial society, water resources are increasingly scarce, and waste acid discharge standards are becoming stricter year by year. People are committed to recycling industrial wastewater and improving water utilization efficiency. The main sources of industrial chlorine-containing wastewater are industrial raw materials and chemical reagents added in industrial operations. In recent years, with the continuous mining of mineral resources, the ore tends to be poor, fine and miscellaneous, resulting in low concentrate grade and high impurity content, which brings high concentration of chlorides in the hydrometallurgy process. The rare earth industry pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C01D3/04
CPCC02F9/00C01D3/04C02F1/52C02F1/001C02F1/26C02F2301/08
Inventor 尹少华张良静吕鹏李世伟张利波彭金辉李亚丽陈楷华
Owner KUNMING UNIV OF SCI & TECH
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