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Compound ionic liquid extraction agent used for extracting copper ions in wastewater and application

A liquid extractant and composite ion technology, which is applied in the extraction of water/sewage treatment, solvent extraction, liquid solution solvent extraction, etc. Good stability, mild operating conditions, and the effect of simplifying the preparation process

Inactive Publication Date: 2019-07-16
LIAONING PETROCCHEM VOCATIONAL & TECH COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Physicochemical extraction and separation can add extractant or chelating agent to ionic liquid, but the storage of ionic liquid is unstable, the extraction rate is low, and volatile substances are easily produced, causing secondary pollution. Therefore, the application of ionic liquid extractant remains to be seen. further development

Method used

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  • Compound ionic liquid extraction agent used for extracting copper ions in wastewater and application
  • Compound ionic liquid extraction agent used for extracting copper ions in wastewater and application
  • Compound ionic liquid extraction agent used for extracting copper ions in wastewater and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add bromo-n-butane and 1-methylimidazole molar ratio 1:1.4 (excessive) to the round-bottom three-necked flask into the reactor, and react in an oil bath at a constant temperature of 85°C for 10 hours to obtain a yellow and clear Liquid, under 0.5 standard atmospheric pressure, the temperature is 70 ° C to remove light components under reduced pressure; add potassium hexafluorophosphate to the reactor according to the molar ratio of n-bromobutane and potassium hexafluorophosphate at a ratio of 1:1 and continue at constant temperature React in an oil bath at 85°C for 10 hours, separate and remove the upper layer, keep the brown oily liquid in the lower layer, put it in a vacuum drying oven at room temperature and dry to constant weight, and obtain composite ions for extracting copper ions in wastewater liquid extractant.

[0024] 2.1 Extraction method

[0025] Take 6mL of the copper ion-containing wastewater solution and place it in a centrifuge tube, add 2mL of the reac...

Embodiment 2

[0042]Add bromo-n-butane and 1-methylimidazole molar ratio 1:1.4 (excessive) into the reactor into the three-necked round-bottomed flask, and react in an oil bath at a constant temperature of 80°C for 10 hours to obtain a yellow clear Liquid, under 0.5 standard atmospheric pressure, the temperature is 70 ° C to remove light components under reduced pressure; add potassium hexafluorophosphate to the reactor according to the molar ratio of n-bromobutane and potassium hexafluorophosphate at a ratio of 1:1 and continue at constant temperature React in an oil bath at 80°C for 10 hours, separate and remove the upper layer, keep the brown oily liquid in the lower layer, put it in a vacuum drying oven at room temperature and dry to constant weight, and obtain the compound ion for extracting copper ions in wastewater liquid extractant.

[0043] 2.1 Extraction method

[0044] Take 6mL of the copper ion-containing wastewater solution and place it in a centrifuge tube, add 1.5mL of the r...

Embodiment 3

[0046] Add bromo-n-butane and 1-methylimidazole molar ratio 1:1.4 (excessive) to the round-bottomed three-necked flask into the reactor, react in an oil bath at a constant temperature of 90°C for 10 hours, and obtain yellow and clear Liquid, under 0.5 standard atmospheric pressure, the temperature is 70 ° C to remove light components under reduced pressure; add potassium hexafluorophosphate to the reactor according to the molar ratio of n-bromobutane and potassium hexafluorophosphate at a ratio of 1:1 and continue at constant temperature React in an oil bath at 90°C for 10 hours, separate and remove the upper layer, keep the brown oily liquid in the lower layer, put it in a vacuum drying oven at room temperature and dry to constant weight, and obtain the composite ion for extracting copper ions in wastewater liquid extractant.

[0047] 2.1 Extraction method

[0048] Take 6mL of the copper ion-containing wastewater solution and place it in a centrifuge tube, add 1.8mL of the r...

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Abstract

The invention discloses a compound ionic liquid extraction agent used for extracting copper ions in wastewater and application. A production method comprises the steps of placing n-butyl bromide and 1-methylimidazole in a reactor in a round-bottom three-necked flask, carrying out reaction in a constant-temperature oil bath pot for 10 hours, and conducting reduced pressure distillation to remove alight component; and according to a molar ratio of the n-butyl bromide to potassium hexafluorophosphate of 1 to 1, adding the potassium hexafluorophosphate into the reactor, continuously carrying outreaction in the constant-temperature oil bath pot for 10 hours, conducting layering after standing, conducting separation to remove supernatant, keeping lower-layer oily liquid, and placing the lower-layer oily liquid in a vacuum drying box for constant-temperature drying until constant weight to obtain the target product. The compound ionic liquid extraction agent used for extracting the copper ions in the wastewater has the advantages that the technology is simple, and design is reasonable. According to the compound ionic liquid extraction agent, ionic liquid production and extraction agentcompounding are completed at the same time, the stability is good, the extraction agent has the characters of being environmentally friendly and efficient, and meanwhile, a process of adding a chelating agent for compounding in addition is omitted.

Description

technical field [0001] The invention relates to a composite ionic liquid extractant for extracting copper ions in waste water and its application. Background technique [0002] Room temperature ionic liquids are usually composed of cations and anions. They are in a liquid state at room temperature, have no vapor pressure, and do not evaporate, so they are not easy to pollute the environment. This type of ionic liquid belongs to organic salts, and its cations, anions, and substituents can be combined and changed at will to change its physical and chemical properties. [0003] The wide application of copper and its compounds in electroplating, smelting, metal processing, electronic materials, machinery manufacturing, organic synthesis and other fields has resulted in the production of a large amount of copper-containing wastewater, including copper-zinc mining and smelting, metal processing, machinery manufacturing, and steel production , electroplating and other wastewaters ...

Claims

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Application Information

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IPC IPC(8): B01D11/04C02F1/26C02F101/20
CPCB01D11/0492C02F1/26C02F2101/20
Inventor 温泉贾威刘进季宏祥赵婷婷刘鑫明姜楠李显哲王巧莲
Owner LIAONING PETROCCHEM VOCATIONAL & TECH COLLEGE
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