Method for extracting and separating phenolic compound in oil-phenol mixture by using quaternary ammonium dication liquid

A phenolic compound, dication technology, applied in the field of phenolic compounds

Active Publication Date: 2017-12-22
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a method for efficiently separating phenolic compounds in view of the existing problems in the separation of phenolic compounds in oil-phenol mixtures

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In this example, phenol and toluene are respectively selected as the analog components of phenolic compounds and oil in the oleophenol mixture. First, add 150.00g of phenolic compound to a beaker containing toluene, stir to dissolve, transfer it to a 500mL volumetric flask, add toluene, shake well and dilute to obtain a simulated oleophenol mixture. The concentration of the compound is 300.00g / L.

[0022] Take 20mL of the above simulated oleylphenol mixture in a 50mL graduated test tube, and add 12.4323g of 1,2-bis(N-triethyl)-1,2-dibromoethane salt, 1,2-bis(N- The molar ratio of triethyl)-1,2-dibromoethane salt [molecular weight is 390g / mol] to phenolic compounds is 0.5, and then placed in a water bath at 25°C and magnetically stirred for 30 minutes, standing for 20 minutes, using a separatory funnel After phase separation, 17.2 mL of phenol-removed oil phase and 3.5 mL of eutectic solvent were obtained.

[0023] The composition of the dephenolic oil phase was analyzed by...

Embodiment 2

[0027] In this example, phenol and toluene are respectively selected as the analog components of phenolic compound and oil in the oleophenol mixture. First, add 50.00g of phenolic compound to a beaker containing toluene, stir to dissolve, transfer it to a 500mL volumetric flask, add toluene, shake well, and dilute to obtain a simulated oleophenol mixture. The concentration of the compound is 100.00g / L.

[0028] Take 20mL of the above-mentioned simulated oleophenol mixture into a 50mL graduated test tube, and add 0.8288g of 1,2-bis(N-triethyl)-1,2-dibromoethane salt, 1,2-bis(N- The molar ratio of triethyl)-1,2-dibromoethane salt [molecular weight is 390g / mol] to phenolic compounds is 0.1, and then placed in a 60℃ water bath and magnetically stirred for 30 minutes, standing for 20 minutes, using a separatory funnel After phase separation, 19.5 mL of the phenol-removed oil phase and 0.8 mL of the eutectic solvent were obtained.

[0029] The composition of the dephenolic oil phase wa...

Embodiment 3

[0033] In this example, phenol and n-hexane are respectively selected as the analog components of phenolic compounds and oil in the oleophenol mixture. First, add 5.00g of phenolic compound to a beaker containing n-hexane, stir to dissolve, transfer it to a 500mL volumetric flask, add n-hexane to it, shake well, and dilute to obtain a simulated oleophenol mixture. The concentration of phenolic compounds is 10.00 g / L.

[0034] Take 20mL of the above simulated oleylphenol mixture in a 50mL graduated test tube, and add 1.6577g of 1,2-bis(N-triethyl)-1,2-dibromoethane salt, 1,2-bis(N- The molar ratio of triethyl)-1,2-dibromoethane salt [molecular weight is 390g / mol] to phenolic compounds is 2.0, and then placed in a 0℃ water bath and magnetically stirred for 30 minutes, standing for 20 minutes, using a separatory funnel Phase separation was performed to obtain 19.5 mL of the phenol-removed oil phase and 0.6 mL of the eutectic solvent.

[0035] An ultraviolet-visible spectrophotometer...

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Abstract

The invention provides a method for extracting and separating a phenolic compound in an oil-phenol mixture by using quaternary ammonium dication liquid. The method comprises the following steps: adding a given amount of quaternary ammonium dication liquid extracting agent into an oil-phenol mixture, stirring at given temperature, enabling the phenolic compound in the oil-phenol mixture to form a deep-eutectic solvent with the quaternary ammonium dication liquid extracting agent, and separating from an oil phase, thus separating the phenolic compound in the oil-phenol mixture, wherein by virtue of a liquid separation method, the deep-eutectic solvent is separated, then a back-extractant is added into the deep-eutectic solvent, the quaternary ammonium dication liquid extracting agent is precipitated in a solid form, and the quaternary ammonium dication liquid extracting agent is obtained by virtue of filtering and separating can be repeatedly used; the phenolic compound in the back-extractant is recovered in a distilling method, and the back-extractant is repeatedly used. The quaternary ammonium dication liquid extracting agent used in the method is environmentally friendly, good in heat stability, not soluble in the oil phase, high in extraction rate and reusable.

Description

Technical field [0001] The invention relates to a method for extracting and separating phenolic compounds in an oleophenol mixture with a quaternary amino double cation liquid. Background technique [0002] Phenolic compound refers to the compound produced by replacing the hydrogen atom on the benzene ring in the aromatic hydrocarbon by the hydroxyl group, and is the hydroxyl-containing derivative of the aromatic hydrocarbon. Common phenolic compounds mainly include phenol, cresol, xylenol and so on. Phenolic compounds are an important chemical intermediate, widely used in synthetic fibers, engineering plastics, pesticides, medicine, explosives and other fields, and have high commercial value. Phenolic compounds are mainly derived from direct coal liquefied oil, coal tar, and biomass pyrolysis oil. The extraction of phenolic compounds from these oil mixtures has been considered an important step in the further refining or application of these oils. The method of separating phe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C37/70C07C37/72C07C37/74C07C39/02C07C39/04B01D11/02B01D11/04
CPCB01D11/0288B01D11/0492C07C37/007C07C37/685C07C39/02C07C39/04
Inventor 吴卫泽纪柚安
Owner BEIJING UNIV OF CHEM TECH
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