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Enrichment of phenol from water using [c4mim]pf6‑tbp binary extractant

A PF6-TBP and extraction agent technology, applied in the field of enrichment of phenol, can solve the problems of complex sampling, high density, uneven dispersion, etc., and achieve the effect of simple sampling operation, maximized contact area, and improved enrichment effect

Inactive Publication Date: 2017-07-04
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The present invention aims at the problems of high viscosity, complex sampling, high density, uneven dispersion and poor enrichment effect of the above ionic liquid micro-extraction system, and proposes to utilize [C 4 mim]PF 6 -Method for enriching phenol from water with TBP binary extractant

Method used

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  • Enrichment of phenol from water using [c4mim]pf6‑tbp binary extractant
  • Enrichment of phenol from water using [c4mim]pf6‑tbp binary extractant
  • Enrichment of phenol from water using [c4mim]pf6‑tbp binary extractant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0035] Take 5 parts with a concentration of 5×10 -4 Put 3 mL of mol / L phenol solution in a 10 mL centrifuge tube, add 2 mL of distilled water, 30 μL [C 4 mim]PF 6Then, add 30, 50, 70, 90, 110 μL of TBP (tributyl phosphate) respectively, shake it by hand for 1 minute, then ultrasonicate at 30°C for 10 minutes to form a milky white microemulsion, and carry out dispersion liquid phase microextraction under this condition . The extracted system was centrifuged in a high-speed centrifuge at 8000 rpm for 4 minutes, the ionic liquid was deposited at the bottom of the centrifuge tube, and phenol was enriched in the ionic liquid phase. Pipette 20 μL of the ionic liquid phase with a microsyringe, dilute it to 3 mL with absolute ethanol, measure its absorbance at a wavelength of 271.50 nm with a UV-Vis instrument, and calculate the phenol content and enrichment factor. The blank is an aqueous solution without phenol. The enrichment factor EF is calculated according to formula 1, and ...

Embodiment 6-11

[0039] Take 6 parts with a concentration of 5×10 -4 Put 3 mL of mol / L phenol solution in a 10 mL centrifuge tube, add 2 mL of distilled water and 50 μL of TBP to each centrifuge tube, and then add 30, 40, 50, 70, 90, 110 μL [C 4 mim]PF 6 , shaken by hand for 1 minute, then ultrasonicated at 30°C for 10 minutes to form a milky white microemulsion, and carried out dispersion liquid phase microextraction under this condition. The extracted system was centrifuged in a high-speed centrifuge at 8000 rpm for 4 minutes, the ionic liquid was deposited at the bottom of the centrifuge tube, and phenol was enriched in the ionic liquid phase. Pipette 20 μL of the ionic liquid phase with a microsyringe, dilute it to 3 mL with absolute ethanol, measure its absorbance at a wavelength of 271.50 nm with a UV-Vis instrument, and calculate the phenol content and enrichment factor. The blank is an aqueous solution without phenol. The enrichment factor EF is calculated according to formula 1, an...

Embodiment 12-17

[0042] Take 6 parts with a concentration of 5×10 -4 Put 3 mL of mol / L phenol solution in a 10 mL centrifuge tube, add 2 mL of distilled water and 30 μL [C 4 mim]PF 6 and 30 μL TBP, shaken by hand for 1 minute, then ultrasonicated at 0, 10, 20, 30, 40, and 50°C for 10 minutes to form a milky white microemulsion, and carried out dispersion liquid phase microextraction under these conditions. The extracted system was centrifuged in a high-speed centrifuge at 8000 rpm for 4 minutes, the ionic liquid was deposited at the bottom of the centrifuge tube, and phenol was enriched in the ionic liquid phase. Pipette 20 μL of the ionic liquid phase with a microsyringe, dilute it to 3 mL with absolute ethanol, measure its absorbance at a wavelength of 271.50 nm with a UV-Vis instrument, and calculate the phenol content and enrichment factor. The blank is an aqueous solution without phenol. The enrichment factor EF is calculated according to formula 1, and the result is as follows image...

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Abstract

The invention provides a method for enriching phenol in water by utilizing a [C4mim]PF6-TBP binary extractant, which comprises the steps of (1) placing a phenol solution into a centrifugal tube, adding a dispersion liquid and a binary extractant successively, uniformly mixing the above components, ultrasonically dispersing the obtained mixture at 0-50 DEG C for 3-25 minutes to form a highly dispersed and uniform micro-emulsion, wherein the binary extractant is composed of [C4mim]PF6 and TBP in the volume ratio of 1: 0.4 to 3.7 correspondingly; (2) after the ultrasonic treatment, centrifuging the micro-emulsion at a centrifugal speed of 7000- 10000 rpm for 1-16 minutes to obtain an aqueous precipitation ionic liquid, wherein phenol is enriched at the bottom of the centrifugal tube. The ionic liquid ionic liquid system is free from being limited by density and hydrophily / hydrophobicity, flexible, adjustable, and wide in range of application.

Description

technical field [0001] The present invention relates to a kind of utilizing ionic liquid [C 4 mim]PF 6 A method for enriching phenol from water with TBP binary extractant. Background technique [0002] With the progress of society and the continuous improvement of the quality of life, environmental hygiene, food safety and other issues closely related to human health have been paid more and more attention. Therefore, the detection of environmental sanitation and food safety is very important. At present, in sample detection, common modern analysis methods, such as atomic absorption spectrometry, atomic fluorescence analysis, plasma emission spectrometry, etc., can quickly and accurately analyze and detect samples, and the accuracy of the above methods must be based on Sample pretreatment is the first and critical step. [0003] At present, for micro or trace samples, common pretreatment methods include solid phase microextraction (SPME) and liquid phase microextraction (...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/40
Inventor 陈玉焕邓雨晨孟艳山张姝明张颖王桂香
Owner HEBEI UNIV OF TECH
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