Method for PEG abduction cloud point abstraction and organic compound inverse abstraction

An organic compound and extraction technology, applied in the direction of liquid solution solvent extraction, etc., to achieve the effect of overcoming separation difficulties

Inactive Publication Date: 2008-09-24
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Further searches found no reports of successful separation of non-volatile or

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0023] Add 0.2g / 100ml of 1-naphthol to Triton X-100 and PEG-20000 aqueous solutions with mass fractions of 20g / 100ml and 6.2g / 100ml respectively, and separate phases at 25 degrees. The recovery rate of the surfactant in the concentrated surfactant phase is 91%, and the mass recovery rate of the organic compound in the concentrated surfactant phase is 90%. Add the organic solvent butanol to the concentrated surfactant phase according to the volume ratio of the concentrated surfactant phase to the organic solvent butanol of 5:3 in the cloud point system, and form Winsor II microemulsion at 25 degrees. The recoveries of surfactants and organic compounds in the water-in-oil phase were 96% and 95%, respectively. The water-in-oil phase in the WinsorII microemulsion was evaporated to remove the solvent butanol under the condition of 40 degrees and 0.08 MPa to obtain a recovery rate of more than 99% of the surfactant and the organic compound. Add ether and water to the mixture of rec...

Embodiment 2

[0025] Add 0.2g / 100ml of 1-naphthol to Triton X-100 and PEG-20000 aqueous solutions with mass fractions of 6g / 100ml and 3g / 100ml respectively, and separate phases at 25 degrees. The recovery rate of the surfactant in the concentrated surfactant phase is 86%, and the mass recovery rate of the organic compound in the concentrated surfactant phase is 88%. Add the organic solvent butanol to the concentrated surfactant phase according to the volume ratio of the concentrated surfactant phase to the organic solvent butanol of 5:3 in the cloud point system, and form Winsor II microemulsion at 25 degrees. The recoveries of surfactants and organic compounds in the water-in-oil phase were 97% and 96%, respectively. The water-in-oil phase in the Winsor II microemulsion was evaporated to remove the solvent butanol under the condition of 40 degrees and 0.08 MPa to obtain a recovery rate of more than 99% of the surfactant and the organic compound. Add ether and water to the mixture of recov...

Embodiment 3

[0027]Add 0.2g / 100ml of 1-naphthol to Triton X-100 and PEG-6000 aqueous solutions with mass fractions of 6g / 100ml and 6g / 100ml, respectively, and separate phases at 25 degrees. The recovery rate of the surfactant in the concentrated surfactant phase is 90%, and the mass recovery rate of the organic compound in the concentrated surfactant phase is 90%. Add the organic solvent butanol to the concentrated surfactant phase according to the volume ratio of the concentrated surfactant phase to the organic solvent butanol of 5:3 in the cloud point system, and form Winsor II microemulsion at 25 degrees. The recoveries of surfactants and organic compounds in the water-in-oil phase were 98% and 93%, respectively. The water-in-oil phase in the Winsor II microemulsion was evaporated to remove the solvent butanol under the condition of 40 degrees and 0.08 MPa to obtain a recovery rate of more than 99% of the surfactant and the organic compound. Add ether and water to the mixture of recove...

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Abstract

The invention discloses a method of PEG-induced cloud point extracting and back extracting organic compound in the chemical engineering technology field, which uses the property that polyethyleneglycol induces hydrophilic surfactant to form two-phase distribution system at room temperature to achieve the extraction of organic compound, and causes the organic compound to be concentrated in the concentrated surfactant phase of the cloud point system. Since the PEG is hydrophilic and is distributed in the superfluous water phase, Winsor 2 micro-emulsion is used to remove the small amount of PEG in the concentrated surfactant phase, the surfactant and the organic compound are obtained after the water-in-oil phase in Winsor 2 micro-emulsion is further vaporized. Winsor 1 micro-emulsion is used for separating the surfactant from the organic compound, then the surfactant in the concentrated surfactant phase in the cloud point system is separated from involatile organic compound, and the surfactant can be recovered.

Description

technical field [0001] The invention relates to a separation method in the technical field of chemical engineering, in particular to a method for extracting and back-extracting organic compounds by PEG-induced cloud point system. Background technique [0002] The nonionic surfactant solution is automatically separated into a concentrated surfactant phase with a high surfactant concentration and a dilute surfactant phase with a small surfactant under certain temperature conditions. This system is called a cloud point system. The application of cloud point system in the separation and concentration of biological macromolecules, metal ions and small organic molecules has attracted the attention of many scholars. Cloud point systems also have potential applications in extractive biotransformation. [0003] Hydrophilic surfactants, such as Triton X-100, have a high cloud point and cannot form a cloud point system at room temperature. Additives, such as salt, PEG, etc., have the...

Claims

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Application Information

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IPC IPC(8): B01D11/04
Inventor 王志龙梁蕊齐瀚实
Owner SHANGHAI JIAO TONG UNIV
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