CN101954201B - Extraction and separation method - Google Patents
Extraction and separation method Download PDFInfo
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- CN101954201B CN101954201B CN201010276589A CN201010276589A CN101954201B CN 101954201 B CN101954201 B CN 101954201B CN 201010276589 A CN201010276589 A CN 201010276589A CN 201010276589 A CN201010276589 A CN 201010276589A CN 101954201 B CN101954201 B CN 101954201B
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Abstract
The invention relates to an extraction and separation method, which comprises the following steps of: mixing and dispersing an organic solvent serving as an extractant, solid particles and water under the action of stirring, shearing, oscillation or ultrasound to prepare oil-in-water solid stable emulsion, and extracting by taking dispersed phase droplets of the solid stable emulsion as an extraction material. By taking the dispersed phase droplets of the solid stable emulsion as the extraction material, the contact area of the extraction material and aqueous solution to be separated can be increased, and the extracting efficiency can be improved. Particularly, the dispersed phase droplets of the solid stable emulsion can be taken as fillers to be filled in a filled column or a filled tower, and the aqueous solution to be separated is allowed to flow through the filled column or the filled tower for continuous extraction and separation.
Description
Technical field
The present invention relates to a kind of separation method, particularly relate to a kind of extraction separating method.
Background technology
Extraction is to utilize that component has the unit operations that different solubilities comes separating mixture in the system in solvent.According to the difference that is extracted mixture thing phase, extraction can be divided into two kinds: (1) liquid-liquid extraction, and with certain component in the selected separated from solvent liquid mixture.Solvent must be immiscible with the mixture liquid that is extracted, and has optionally solvability, and possess good heat endurance and chemical stability, and less toxicity and corrosivity.(2) leaching is also named leaching, with certain component in the separated from solvent solid mixture.
The mixture that is extracted is the aqueous solution as a rule, and the extractant of employing is generally and the immiscible organic solvent of water.In order to improve extraction efficiency, the mixture and the contact area of extractant that take usually to stir, vibration, mode such as centrifugal are extracted when increasing extraction with the raising mass transfer rate, often need increase separation costs than complex apparatus and operating process.
Summary of the invention
The objective of the invention is to propose the mixture that a kind of increase is extracted and the contact area of extractant, and then improve the extraction separating method of extraction efficiency.
The concrete technical scheme that the present invention adopts is:
A kind of extraction separating method; It is characterized in that will be as organic solvent and solids and water mixed and dispersed under the perhaps ultrasonication of stirring, shear, vibrate of extractant; Be prepared into the oil-in-water type Pickering emulsion, the dispersed phase drop with Pickering emulsion carries out extracting operation as the extraction material then.
Extracting operation carries out in two ways:
(1), the dispersed phase drop of said Pickering emulsion mixes, stirs with the aqueous solution to be separated, and carries out the operation of batch (-type) extract and separate.
(2), the dispersed phase drop of said Pickering emulsion is as filler, is seated in filled column or the packed tower, makes the aqueous solution to be separated flow through filled column or packed tower, carries out the operation of continous way extract and separate.
Said organic solvent, for the immiscible a kind of organic solvent of water, also can be mixture with the immiscible several kinds of organic solvents of water.
Said solids are the particle to extractant and stabilized aqueous solution to be separated.
Said solids are a kind of particle, or the stuff and other stuff of several kinds of particles.
The particle diameter of said solids is between 5 nanometers～30 micron.
The mass ratio of said solids and water is 0.005～0.1, is 0.1～0.7 as the organic solvent of extractant and the mass ratio of water.
The present invention compared with prior art has the following advantages:
As the extraction material, the contact area of extraction material and the aqueous solution to be separated improves extraction efficiency in the time of can increasing extraction with the dispersed phase drop of Pickering emulsion.Particularly can be seated in filled column or the packed tower, make the aqueous solution to be separated flow through filled column or packed tower, carry out the operation of continous way extract and separate with the dispersed phase drop of Pickering emulsion as filler.
The specific embodiment
Embodiment 1: with 0.005 gram particle directly is silicon dioxide granule, 1 gram water and the 0.1 gram chloroform mixed and dispersed under agitation of 5 nanometers, makes the oil-in-water type Pickering emulsion.With gained Pickering emulsion and 10 ml concns is the crystal violet aqueous solution of 1 mg/litre, stirs after 30 minutes, and the crystal violet concentration of aqueous solution drops to 0.8 mg/litre.
Embodiment 2: with 0.1 gram particle directly is 20 microns zinc oxide particle, 1 gram water and 0.7 gram chloroform mixed and dispersed under agitation, makes the oil-in-water type Pickering emulsion.With the gained Pickering emulsion internal diameter of packing into is that the dispersed phase drop of Pickering emulsion sinks to the bottom of glass column, makes the filler splitter in 1 centimetre the glass column.The crystal violet solution that with 10 ml concns is 10 mg/litre flows through this splitter from top to bottom with the speed of 1 ml/min.Crystal violet concentration drops to 0.1 mg/litre from the solution that splitter flows out.
Embodiment 3: with 0.02 gram particle directly is 30 microns TiO 2 particles, 2 gram water and 1 gram toluene mixed and dispersed under agitation, makes the oil-in-water type Pickering emulsion.With the gained Pickering emulsion internal diameter of packing into is in 1 centimetre the glass column, and the floating top to glass column of the dispersed phase drop of Pickering emulsion makes splitter.Will with 10 ml concns be the crystal violet solution of 12 mg/litre with the speed of 1 ml/min from bottom to top through this splitter.Crystal violet concentration drops to 0.2 mg/litre from the solution that splitter flows out.
Embodiment 4: 0.2 gram stuff and other stuff (0.1 gram particle directly is that 1 micron silicon dioxide granule, zinc oxide particle and 0.06 gram particle that 0.04 gram particle directly is 40 nanometers directly are the stuff and other stuff of the tri-iron tetroxide particle of 300 nanometers), 2 gram water, 1 are restrained mixed organic solvents (mixed organic solvents of 0.7 gram chloroform and 0.3 gram toluene) mixed and dispersed under agitation, make the oil-in-water type Pickering emulsion.With gained Pickering emulsion and 10 ml concns is the crystal violet aqueous solution of 1 mg/litre.Stir after 30 minutes, the concentration of the crystal violet aqueous solution drops to 0.1 mg/litre.
As the extraction material, the contact area of extraction material and the aqueous solution to be separated improves extraction efficiency in the time of can increasing extraction with the dispersed phase drop of Pickering emulsion.Particularly can be seated in filled column or the packed tower, make the aqueous solution to be separated flow through filled column or packed tower, carry out the operation of continous way extract and separate with the dispersed phase drop of Pickering emulsion as filler.
Claims (4)
1. extraction separating method; It is characterized in that: directly be silicon dioxide granule, 1 gram water and the 0.1 gram chloroform mixed and dispersed under agitation of 5 nanometers with 0.005 gram particle; Make the oil-in-water type Pickering emulsion; With gained Pickering emulsion and 10 ml concns is the crystal violet aqueous solution of 1 mg/litre, stirs after 30 minutes, and the crystal violet concentration of aqueous solution drops to 0.8 mg/litre.
2. extraction separating method is characterized in that: with 0.1 gram particle directly is 20 microns zinc oxide particle, 1 gram water and 0.7 gram chloroform mixed and dispersed under agitation, makes the oil-in-water type Pickering emulsion; With the gained Pickering emulsion internal diameter of packing into is that the dispersed phase drop of Pickering emulsion sinks to the bottom of glass column, makes the filler splitter in 1 centimetre the glass column; The crystal violet solution that with 10 ml concns is 10 mg/litre flows through this splitter from top to bottom with the speed of 1 ml/min; Crystal violet concentration drops to 0.1 mg/litre from the solution that splitter flows out.
3. extraction separating method is characterized in that: with 0.02 gram particle directly is 30 microns TiO 2 particles, 2 gram water and 1 gram toluene mixed and dispersed under agitation, makes the oil-in-water type Pickering emulsion; With the gained Pickering emulsion internal diameter of packing into is in 1 centimetre the glass column, and the floating top to glass column of the dispersed phase drop of Pickering emulsion makes splitter; Will with 10 ml concns be the crystal violet solution of 12 mg/litre with the speed of 1 ml/min from bottom to top through this splitter; Crystal violet concentration drops to 0.2 mg/litre from the solution that splitter flows out.
4. extraction separating method; It is characterized in that: with 0.2 gram stuff and other stuff, stuff and other stuff directly is that the tri-iron tetroxide particle that 1 micron silicon dioxide granule, zinc oxide particle that 0.04 gram particle directly is 40 nanometers and 0.06 gram particle directly are 300 nanometers is formed by 0.1 gram particle; 2 gram water; 1 gram mixed organic solvents, mixed organic solvents is made up of 0.7 gram chloroform and 0.3 gram toluene; Under agitation mixed and dispersed makes the oil-in-water type Pickering emulsion; With gained Pickering emulsion and 10 ml concns is the crystal violet aqueous solution of 1 mg/litre; Stir after 30 minutes, the concentration of the crystal violet aqueous solution drops to 0.1 mg/litre.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010276589A CN101954201B (en) | 2010-09-09 | 2010-09-09 | Extraction and separation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010276589A CN101954201B (en) | 2010-09-09 | 2010-09-09 | Extraction and separation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101954201A CN101954201A (en) | 2011-01-26 |
| CN101954201B true CN101954201B (en) | 2012-10-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201010276589A Expired - Fee Related CN101954201B (en) | 2010-09-09 | 2010-09-09 | Extraction and separation method |
Country Status (1)
| Country | Link |
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Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4268395A (en) * | 1978-10-04 | 1981-05-19 | Babcock-Brown Boveri Reaktor Gmbh | Extraction by solid stabilized emulsions |
| CA2040173A1 (en) * | 1990-04-23 | 1991-10-24 | Stephen C. Paspek | Process for separating extractable organic material from compositions comprising oil-in-water emulsions comprising said extractable organic material and solids |
| CN101269275B (en) * | 2008-05-15 | 2010-08-25 | 上海交通大学 | Method for PEG abduction cloud point abstraction and organic compound inverse abstraction |
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| CN101954201A (en) | 2011-01-26 |
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Granted publication date: 20121017 Termination date: 20130909 |