季膦盐离子液体/表面活性剂/盐双水相的性质及萃取效果研究

doi:10.11962/1006-4990.2020-0322

Abstract

Abstract:

Dyes are the most commonly used raw materials in the leather and textile industries, thereinto, printing and dyeing waste water has the characteristics of large amount, high content of organic pollutants, deep chroma, large alkalinity and large changes in water quality, which is difficult to treat.Therefore, it is of great significance to study the extraction and separation of dyes.Solvent extraction is one of the effective methods to purify printing and dyeing waste water.Ionic liquid aqueous two phase system can be used for extraction and separation of substances.The aqueous two phase system of ionic liquid/surfactant system meets the requirements of green chemistry and the research is rare at present.The ionic liquid of tetrabutylphosphonate ferric chloride and tetradecyltributylphosphine ferric chloride（[P4444]FeCl₄, [P44414]FeCl₄） and two surfactants of sodium dodecyl sulfate and sodium dodecyl benzene sulfonate（SDS, SDBS） and sodium citrate were mixed to form an aqueous two phase system.The phase diagram of[P4444] FeCl₄（[P44414] FeCl₄）/SDS（SDBS）/salt system was drawn.It was found that the particle size of the upper phase was about 60~80 nm, and the particle size of the lower phase was too small to be detected.The effects of aqueous two phase system on the extraction of dyes with different properties were studied by UV-vis spec trophotometry.The results showed that the length of hydrophobic chain of ionic liquid and the presence of benzene ring on the hydrophobic chain of surfactant affected the region of aqueous two phase system.The four aqueous two phase systems had good extraction performance on water soluble dyes but the extraction performance on oil soluble dyes was not good.This study promotes the development and utilization of ionic liquids in chemical separation region.

Key words: ionic liquid, surfactant, aqueous two phase systems, extraction

CLC Number:

TF804.2

Wang Jia,Liu Jinyan,Gao Jun,Wang Lu,Wang Yongli. Study on properties and extraction efficiency of quaternary phosphonium salt ionic liquid/Surfactant/salt aqueous two phase systems[J]. Inorganic Chemicals Industry, 2021, 53(4): 43-47.

Figures/Tables 7

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References 17

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体系	V（SDS）/ μL	V（SDBS）/ μL	V（[P4444] FeCl₄）/μL	V（[P44414] FeCl₄）/μL	ρ_salt/ （g·L^-1）
[P4444] FeCl₄/SDS/盐	1 800	─	2 200	─	85.25
[P4444] FeCl₄/SDBS/盐	─	2 000	2 150	─	32.28
[P44414]FeCl₄/SDS/盐	1 550	─	─	2 450	130.25
[P44414] FeCl₄ /SDBS/盐	─	2 050	─	1 950	98.00

体系	萃取率/%
体系	荧光素	甲基橙	二甲基酚橙	亚甲基蓝
[P4444]FeCl₄/SDS/盐	50	92	92	92
[P4444]FeCl₄/SDBS/盐	26	82	87	80
[P44414]FeCl₄/SDS/盐	57	95	96	96
[P44414]FeCl₄/SDBS/盐	40	87	94	86

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Study on properties and extraction efficiency of quaternary phosphonium salt ionic liquid/Surfactant/salt aqueous two phase systems

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