CN110548312A - method for separating water-in-oil or oil-in-water emulsion by using fly ash - Google Patents
method for separating water-in-oil or oil-in-water emulsion by using fly ash Download PDFInfo
- Publication number
- CN110548312A CN110548312A CN201910788394.4A CN201910788394A CN110548312A CN 110548312 A CN110548312 A CN 110548312A CN 201910788394 A CN201910788394 A CN 201910788394A CN 110548312 A CN110548312 A CN 110548312A
- Authority
- CN
- China
- Prior art keywords
- water
- oil
- fly ash
- emulsion
- separation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/0208—Separation of non-miscible liquids by sedimentation
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention belongs to the technical field of preparation of environment functional materials, and relates to a method for separating water-in-oil or oil-in-water emulsions by using fly ash; the method comprises the following steps: washing the fly ash with deionized water, then drying, grinding and screening after drying; spreading the fly ash obtained after screening into a fly ash layer as a separation layer; pre-wetting before emulsion separation; when the oil-in-water emulsion is separated, water is firstly used for pre-wetting; when separating the water-in-oil emulsion, firstly, oil is used for pre-wetting; after prewetting, emulsion separation can be carried out; the raw materials are cheap and easy to obtain, and the recycling of wastes is realized; the used fly ash layer shows underwater super oleophobic and oil super hydrophobic properties, and simultaneously realizes the water and oil resistance function; the method has the advantages of simple process, low equipment requirement, environmental protection, no need of additional chemical treatment and external force, excellent separation function and recycling property, and wide prospect in the field of industrial wastewater treatment.
Description
Technical Field
The invention belongs to the technical field of pollutant treatment, and particularly relates to a method for separating a water-in-oil or oil-in-water emulsion by using fly ash.
Background
The vigorous development of manufacturing industry, textile industry, food industry and the like inevitably forms a large amount of oily wastewater, and meanwhile, frequent accidents of crude oil leakage and oil spill around the world seriously threaten the ecological environment and related human activities, and greatly influence the sustainable development of human beings and society. With the increasing proposal of environmental protection concept, the problem of oil-water separation has attracted more and more attention. Oily wastewater is often in various forms, and can be generally divided into free oil, dispersed oil, emulsified oil and dissolved oil according to the physical state of oil and water, wherein the separation difficulty of the emulsified oil, including oil-in-water emulsion and water-in-oil emulsion, is the greatest because the liquid size is small, generally less than 20 μm. The traditional oil-water separation technology comprises a flotation method, a high-pressure electrostatic method, a gravity method, a microbiological method and the like, and the traditional oil-water separation technology has the problems of high cost, complex process, high equipment requirement, easiness in secondary pollution and the like, so that the wide application of the traditional oil-water separation technology in the field of oil-water emulsion separation is limited.
in recent years, materials having a specific wettability to water or oil have been the focus of discussion in the field of oil-water emulsion separation. These materials are generally classified into two types, oil-blocking type and water-blocking type, according to different interface effects; wherein, the oil-resistant material has underwater super-oleophobic property, namely, under the environment of an aqueous medium, the surface of the material shows an oil contact angle of more than 150 degrees. Such oil barrier materials can selectively separate oil from an oil-in-water emulsion, water can permeate through the material, and oil is hindered. Vice versa, the water-blocking material exhibits an oily superhydrophobicity, i.e. the material exhibits a water contact angle greater than 150 ° in an oily medium environment. When a water-in-oil emulsion is passed through the material, water is blocked thereon and oil can pass; furthermore, there is very little material that can simultaneously perform both water and oil blocking functions.
Common materials with the above-mentioned special wettability for oil-water separation include: metal meshes, polymeric films, syntactic foams, and the like. These materials are often limited by the disadvantages of complicated preparation means, high cost, poor stability, possible addition of additional toxic and harmful chemicals, need of additional driving force, etc., and are rarely put into practical use. The fly ash is a byproduct of industrial production and solid waste, so that dust pollution to the environment and resource waste are easily caused. If the fly ash can be used with high value, additional chemical cost and raw materials are not needed, and the problem of emulsion in industrial wastewater can be solved, which fully accords with the green concept of sustainable development. Therefore, it is very important to develop an oil-water separation material with low cost, environmental protection, strong stability and high efficiency.
Disclosure of Invention
In view of the deficiencies of the prior art, the present invention is directed to solving one of the problems; the method for separating the oil-in-water or oil-in-water emulsion by using the fly ash as the solid waste uses the oil-in-water superhydrophobic property and the oil-in-water superoleophobic property of the fly ash as the raw material, and the material can be used for separating the oil-in-water or oil-in-water emulsion by pre-wetting without additional auxiliary materials and chemical treatment, thereby reflecting the high-value utilization of the fly ash. The separation process has high efficiency, large flux, high stability, low cost and environmental protection, and greatly solves the problem of emulsion in industrial wastewater.
In order to achieve the above purpose, the specific steps are as follows:
(1) Washing the fly ash with deionized water, filtering out the solution after washing, drying the washed fly ash, and grinding and screening the dried fly ash to obtain the fly ash with a certain particle size;
(2) Spreading the fly ash obtained after screening in the step (1) into a fly ash layer with a certain thickness to be used as a separation layer; before emulsion separation, pre-wetting the surface of a separation layer according to different emulsion types; when the oil-in-water emulsion is separated, water is firstly used for pre-wetting; when separating the water-in-oil emulsion, firstly, oil is used for pre-wetting; after prewetting, emulsion separation can be carried out.
preferably, the deionized water cleaning mode in the step (1) is ultrasonic cleaning.
Preferably, the ultrasonic cleaning time in the step (1) is 10-30 min.
preferably, the drying temperature in the step (1) is 50-100 ℃, and the drying time is 5-10 h.
preferably, the particle size of the fly ash with a certain particle size in the step (1) is 1-300 μm.
Preferably, the thickness of the fly ash layer with a certain thickness in the step (2) is 0.5-8 cm;
Further, the thickness of the fly ash layer is 1-3 cm.
the invention uses fly ash to separate water-in-oil or oil-in-water emulsion, and the method comprises the following steps:
Three oils were chosen for the water-in-oil or oil-in-water emulsion formulation: water and oil (diesel or n-hexane or kerosene) were mixed at 95: 5 is mixed with span 80, the mixture is stirred vigorously for 6 hours to form white emulsion, and no emulsion breaking phenomenon is observed within 12 hours at room temperature; a water-in-oil emulsion containing 5% deionized water, 95% oil (diesel or n-hexane or kerosene) was prepared according to the same procedure. The prepared fly ash is fixed between the contact of the glass tube and the conical flask, and the single-layer stainless steel net is spread on the lower layer of the fly ash to prevent the fly ash from leaking to the conical flask. The surface of the fly ash is pre-wetted as required, then the emulsion is poured into an upright glass tube, passes through a fly ash layer, and oil-water separation is realized through gravity driving.
The invention has the beneficial effects that:
(1) the fly ash used in the process is an industrial solid waste; the invention realizes high-value utilization of the fly ash through simple treatment without additional chemical treatment and additional energy drive.
(2) the fly ash used in the process is a loose and porous material with a micro-nano composite structure, shows underwater super-oleophobic and oil-underwater super-hydrophobic properties, simultaneously realizes the functions of water and oil resistance, and can be used for separating oil-in-water emulsion and water-in-oil emulsion; when the coal ash layer is used for separating oil-in-water (diesel oil, kerosene or normal hexane) emulsions, three different oil-in-water emulsions are separated, the flux values of the three oil-in-water emulsions exceed 1000, and the separation efficiency is higher than 98.3%; wherein, the separation effect of the diesel oil in water reaches 99.1 percent; and the flux values of the three water-in-oil emulsions are all over 950, the separation efficiency is more than 99.0%, wherein the water-in-diesel oil separation effect reaches 99.5%, the high-value utilization of industrial solid waste is reflected, and a foundation is provided for the treatment of industrial wastewater.
(3) The method has the advantages of simple and easy operation, low cost, good effect, suitability for large-scale application and capability of treating various oil-water separation problems.
Drawings
FIG. 1 is a schematic representation of the contact angles of wettability of the fly ash of example 6 in different states: wherein (a) is a hydrophilic graph of fly ash in air; (b) is an oleophylic graph of fly ash in air; (c) is an oleophobic picture of fly ash in water; (d) is the hydrophobic pattern of fly ash in oil.
FIG. 2 is a graph of the operation of fly ash prepared under example 6 for separating a diesel oil-in-water emulsion; wherein a is a device diagram for separating the diesel oil emulsion in water by using fly ash, b and c are process diagrams for separating the diesel oil emulsion in water, D is a finished diagram for separating the diesel oil emulsion in water, and D is a partial enlarged view of diesel oil in a separation pipe; the right picture in e is a picture of the diesel oil-in-water emulsion, and the left picture is a microscope picture of the diesel oil-in-water emulsion; the right picture in f is a picture of the water solution after the diesel oil-in-water emulsion is separated, and the left picture is a microscope picture of the water solution after the diesel oil-in-water emulsion is separated.
FIG. 3 is a graph of the separation efficiency and flux for the separation of oil-in-water emulsions using fly ash in example 6.
FIG. 4 is an operational diagram of separating a water-in-diesel emulsion using fly ash in example 6; wherein a is a device diagram for separating the water-in-diesel emulsion by using the fly ash, b and c are diagrams of a process for separating the water-in-diesel emulsion, and d is a completion diagram for separating the water-in-diesel emulsion; the right picture in e is a picture of the water-in-diesel emulsion, and the left picture is a microscope picture of the water-in-diesel emulsion; the right picture in f is a picture of the water solution after the separation of the water-in-diesel emulsion, and the left picture is a picture of a microscope of the water solution after the separation of the water-in-diesel emulsion.
FIG. 5 is a graph of separation efficiency and flux for the separation of water-in-oil emulsions using fly ash of example 6.
Fig. 6 is a graph of separation efficiency and flux for different thickness fly ash layers for separating diesel oil-in-water emulsion (a) and diesel water-in-water emulsion (b).
FIG. 7 is a graph of the separation efficiency of fly ash treated with hydrochloric acid in comparative example 1 and sodium hydroxide in comparative example 2 for separating diesel in water from diesel in water.
Detailed Description
the following further describes embodiments of the present invention with reference to the drawings.
comparative example 1:
(1) Adding 40g of fly ash into 0.1mol/L hydrochloric acid, completely submerging, uniformly stirring, filtering, then washing with deionized water, washing, filtering to remove the solution, drying the washed fly ash in a drying oven at 100 ℃ for 5 hours to obtain dried fly ash, grinding, and screening by using a 50-mesh screen;
(2) Spreading the screened fly ash into a fly ash layer with the thickness of 2cm, wetting the surface of the fly ash layer by using 5mL of deionized water before separating the diesel oil emulsion in the water bag, and then pouring the diesel oil emulsion in the water bag with the span 80 stability into a separating device for separation; before separating the water-in-diesel emulsion, 5mL of diesel oil is used for wetting the surface of the fly ash layer, and then the stable water-in-diesel emulsion of span 80 is poured into a separating device for separation.
Comparative example 2:
(1) Adding 40g of fly ash into 0.1mol/L sodium hydroxide solution, completely submerging, uniformly stirring, filtering, washing with deionized water, washing, filtering to remove the solution, drying the washed fly ash in a drying oven at 100 ℃ for 5 hours to obtain dried fly ash, grinding, and screening by using a 50-mesh screen;
(2) Spreading the screened fly ash into a fly ash layer with the thickness of 2cm, wetting the surface of the fly ash layer by using 5mL of deionized water before separating the diesel oil emulsion in the water bag, and then pouring the diesel oil emulsion in the water bag with the span 80 stability into a separating device for separation; before separating the water-in-diesel emulsion, 5mL of diesel oil is used for wetting the surface of the fly ash layer, and then the stable water-in-diesel emulsion of span 80 is poured into a separating device for separation.
Example 1:
(1) putting the fly ash into deionized water for ultrasonic cleaning, wherein the ultrasonic cleaning time is 10 min; filtering the solution after cleaning, drying the cleaned fly ash in a 50 ℃ oven for 10h to obtain the dried fly ash, grinding, and screening by using a 50-mesh screen;
(2) spreading the screened fly ash into a fly ash layer with the thickness of 0.5cm, wetting the surface of the fly ash layer by using 5mL of deionized water before separating the diesel oil emulsion in the water bag, and then pouring the diesel oil emulsion in the water bag with span 80 stability into a separating device for separation; before separating the water-in-diesel emulsion, 5mL of diesel oil is used for wetting the surface of the fly ash layer, and then the stable water-in-diesel emulsion of span 80 is poured into a separating device for separation.
Example 2:
(1) Putting the fly ash into deionized water for ultrasonic cleaning, wherein the ultrasonic cleaning time is 20 min; filtering out the solution after cleaning, drying the cleaned fly ash in an oven at 60 ℃ for 9 hours to obtain the dried fly ash, grinding the fly ash, and screening by using a 50-mesh screen;
(2) Spreading the screened fly ash into a fly ash layer with the thickness of 1cm, wetting the surface of the fly ash layer by using 5mL of deionized water before separating the diesel oil emulsion in the water bag, and then pouring the diesel oil emulsion in the water bag with the span 80 stability into a separation device for separation; before separating the water-in-diesel emulsion, 5mL of diesel oil is used for wetting the surface of the fly ash layer, and then the stable water-in-diesel emulsion of span 80 is poured into a separating device for separation.
Example 3:
(1) putting the fly ash into deionized water for ultrasonic cleaning, wherein the ultrasonic cleaning time is 20 min; filtering out the solution after cleaning, drying the cleaned fly ash in an oven at 70 ℃ for 8h to obtain the dried fly ash, grinding, and screening by using a 50-mesh screen;
(2) Spreading the screened fly ash into a fly ash layer with the thickness of 3cm, wetting the surface of the fly ash layer by using 5mL of deionized water before separating the diesel oil emulsion in the water bag, and then pouring the diesel oil emulsion in the water bag with the span 80 stability into a separating device for separation; before separating the water-in-diesel emulsion, 5mL of diesel oil is used for wetting the surface of the fly ash layer, and then the stable water-in-diesel emulsion of span 80 is poured into a separating device for separation.
Example 4:
(1) putting the fly ash into deionized water for ultrasonic cleaning, wherein the ultrasonic cleaning time is 20 min; filtering out the solution after cleaning, drying the cleaned fly ash in an oven at 80 ℃ for 7h to obtain the dried fly ash, grinding, and screening by using a 50-mesh screen;
(2) spreading the screened fly ash into a fly ash layer with the thickness of 5cm, wetting the surface of the fly ash layer by using 5mL of deionized water before separating the diesel oil emulsion in the water bag, and then pouring the diesel oil emulsion in the water bag with the span 80 stability into a separation device for separation; before separating the water-in-diesel emulsion, 5mL of diesel oil is used for wetting the surface of the fly ash layer, and then the stable water-in-diesel emulsion of span 80 is poured into a separating device for separation.
Example 5:
(1) Putting the fly ash into deionized water for ultrasonic cleaning, wherein the ultrasonic cleaning time is 30 min; filtering out the solution after cleaning, drying the cleaned fly ash in a drying oven at 90 ℃ for 6 hours to obtain the dried fly ash, grinding the fly ash, and screening by using a 50-mesh screen;
(2) spreading the screened fly ash into a fly ash layer with the thickness of 8cm, wetting the surface of the fly ash layer by using 5mL of deionized water before separating the diesel oil emulsion in the water bag, and then pouring the diesel oil emulsion in the water bag with the span 80 stability into a separation device for separation; before separating the water-in-diesel emulsion, 5mL of diesel oil is used for wetting the surface of the fly ash layer, and then the stable water-in-diesel emulsion of span 80 is poured into a separating device for separation.
Example 6:
(1) Putting the fly ash into deionized water for ultrasonic cleaning, wherein the ultrasonic cleaning time is 30 min; filtering out the solution after cleaning, drying the cleaned fly ash in an oven at 100 ℃ for 5 hours to obtain the dried fly ash, grinding, and screening by using a 50-mesh screen;
(2) spreading the screened fly ash into a fly ash layer with the thickness of 2cm, wetting the surface of the fly ash layer by using 5mL of deionized water before separating diesel oil in water, kerosene in water and normal hexane emulsion in water, and then pouring the emulsion with span 80 stability into a separation device for separation;
Wetting the surface of the fly ash layer with 5mL of diesel before separating the water-in-diesel emulsion, and wetting the surface of the fly ash layer with 5mL of kerosene before separating the water-in-kerosene emulsion; wetting the surface of the fly ash layer by using 5mL of normal hexane before separating the normal hexane-in-water emulsion, and wetting the surface of the fly ash layer by using 5mL of water when separating the oil-in-water (diesel oil or kerosene or normal hexane) emulsion; the span 80 stable emulsion was then poured into a separation device for separation.
FIG. 1 is a schematic representation of the wetting contact angles of fly ash from example 6 in different states: wherein (a) is a hydrophilic picture of the fly ash in the air, and the fly ash shows super-hydrophilicity in the air; (b) the oil-water separation agent is an oleophylic graph of fly ash in air, and the fly ash shows super lipophilicity in the air; (c) the oil-repellent coating is an oil-repellent graph of fly ash in water, wherein the contact angle is 156 degrees, and the fly ash shows super oil-repellent property under water; (d) the hydrophobic pattern of the fly ash in oil is shown, the contact angle is 151 degrees, and the fly ash shows super-hydrophobicity in oil.
FIG. 2 is a graph of the operation of the screened fly ash layer of example 6 for separating a diesel oil-in-water emulsion; wherein a is a device diagram for separating the diesel oil emulsion in water by using fly ash, b and c are process diagrams for separating the diesel oil emulsion in water, D is a finished diagram for separating the diesel oil emulsion in water, and D is a partial enlarged view of diesel oil in a separation pipe; the right picture in e is a picture of the diesel oil-in-water emulsion, and the left picture is a microscope picture of the diesel oil-in-water emulsion; the right picture in f is a picture of the water solution after the diesel oil-in-water emulsion is separated, and the left picture is a microscope picture of the water solution after the diesel oil-in-water emulsion is separated.
The experimental result shows that the filtered water is collected in the conical flask, and the trace kerosene is resisted due to the super-oleophobic property of the fly ash; e and f show that the liquid before separation is white emulsion with different particle sizes, the separated aqueous solution is transparent, no liquid drop is displayed by a light mirror, no tiny oil drop is found, and a good separation effect is embodied.
FIG. 3 is a graph of the separation efficiency and flux for separating a diesel-in-water (diesel/water) emulsion, a kerosene-in-water (kerosene/water) emulsion, and a n-hexane-in-water (n-hexane/water) emulsion for a fly ash layer prepared under example 6; the flux values of three different oil-in-water emulsions are more than 1000, the separation efficiency is more than 98.3%, wherein the separation effect of the oil-in-water diesel oil emulsion reaches 99.1%, and the high-value utilization of industrial solid waste is reflected.
FIG. 4 is an operational diagram of separating a water-in-diesel emulsion using fly ash in example 6; wherein a is a device diagram for separating the water-in-diesel emulsion by using the fly ash, b and c are diagrams of a process for separating the water-in-diesel emulsion, and d is a completion diagram for separating the water-in-diesel emulsion; the right picture in e is a picture of the water-in-diesel emulsion, and the left picture is a microscope picture of the water-in-diesel emulsion; the right picture in f is a picture of the water solution after the separation of the water-in-diesel emulsion, and the left picture is a picture of a microscope of the water solution after the separation of the water-in-diesel emulsion. Experimental results show that the filtered diesel oil is collected in the conical flask, and trace water is resisted due to the super-hydrophobicity of the fly ash. e and f show that the liquid before separation is yellow green emulsion and has different particle sizes, the liquid obtained after separation is clear, and a light mirror shows no liquid drop, so that a good separation effect is embodied.
FIG. 5 is a graph of the separation efficiency and flux of fly ash prepared under example 6 for separating a water-in-diesel (water/diesel) emulsion, a water-in-kerosene (water/kerosene) emulsion, and a water-in-hexane (water/n-hexane) emulsion; the flux values of three different water-in-oil emulsions are separated, the flux values are all over 950, the separation efficiency is all more than 99.0%, wherein the separation effect of the water-in-diesel emulsion reaches 99.5%, and a foundation is provided for the treatment of industrial wastewater.
FIG. 6 is a graph of separation efficiency and flux for fly ash separation diesel oil-in-water emulsion (a) and diesel oil-in-water emulsion (b) of different thicknesses. Experimental results show that no matter the coal ash is in a diesel oil-in-water emulsion or a diesel oil-in-water emulsion, the coal ash with the thickness of 0.5cm cannot be effectively separated, and the separation efficiency is lower than 59%; for the fly ash separation water-in-water diesel oil with the thickness of 1cm, the flux value is 1068, the separation efficiency is only 97.5%, the separation efficiency of the fly ash separation water-in-water diesel oil with the thickness of 3cm reaches 98.9%, the flux value is only 750, and relatively speaking, the effect of the fly ash separation water-in-water diesel oil with the thickness of 2cm is the best, the flux value reaches 1050, and the separation efficiency reaches 99.1%; vice versa, the water-in-diesel separation effect of the fly ash with the thickness of 2cm is the best, the flux value reaches 925, and the separation efficiency reaches 99.5%; when the fly ash with the thickness of 5cm and 8cm is used for separating diesel oil in water or diesel oil in water emulsion, the separation efficiency is slightly reduced, but the flux is obviously reduced, and the separation time is too long, so that the effectiveness and the rapidity of emulsion separation cannot be achieved. In a word, the larger the thickness of the fly ash is, the relatively improved separation effect is, but the flux is obviously reduced, and the smaller the thickness of the fly ash is, the lower the separation efficiency is. This is because the higher the fly ash is stacked, the better the compactness is, the stronger the ability of catching liquid drops is, resulting in more or less catching of oil drops and water drops, thereby reducing the separation efficiency, while the weaker the stacking is, the looser is, the stronger is the liquid drop permeability.
FIG. 7 is a graph showing the separation efficiency of a 2cm thick fly ash layer prepared under comparative examples 1 and 2 for separating diesel oil-in-water and water-in-diesel oil. Experimental results show that the efficiency of separating the diesel oil emulsion from the fly ash is obviously lower than that of the fly ash directly treated by water after the treatment of hydrochloric acid or sodium hydroxide, which probably results in that the surface layer structure of the fly ash is damaged by the hydrochloric acid or the sodium hydroxide, so that the capacity of capturing liquid drops is weakened. The fly ash directly treated by water is not required to be treated by a chemical reagent, but is directly used as a separation material, so that the high-value utilization of the fly ash in the field of industrial wastewater is reflected.
Description of the drawings: the above embodiments are only used to illustrate the present invention and do not limit the technical solutions described in the present invention; thus, although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted; all such modifications and variations that do not depart from the spirit and scope of the invention are intended to be included within the scope of the appended claims.
Claims (7)
1. A method for separating water-in-oil or oil-in-water emulsion by using fly ash is characterized by comprising the following steps:
(1) Washing the fly ash with deionized water, filtering out the solution after washing, drying the washed fly ash, and grinding and screening the dried fly ash to obtain the fly ash with a certain particle size;
(2) Spreading the fly ash obtained after screening in the step (1) into a fly ash layer with a certain thickness to be used as a separation layer; before emulsion separation, pre-wetting the surface of a separation layer according to different emulsion types; when the oil-in-water emulsion is separated, water is firstly used for pre-wetting; when separating the water-in-oil emulsion, firstly, oil is used for pre-wetting; after prewetting, emulsion separation can be carried out.
2. the method for separating water-in-oil or oil-in-water emulsion by using fly ash as claimed in claim 1, wherein the washing with deionized water in step (1) is ultrasonic washing.
3. the method for separating the water-in-oil or oil-in-water emulsion by using the fly ash as claimed in claim 1, wherein the ultrasonic cleaning time in the step (1) is 10-30 min.
4. The method for separating a water-in-oil or oil-in-water emulsion by using fly ash as claimed in claim 1, wherein the drying temperature in the step (1) is 50-100 ℃ and the drying time is 5-10 h.
5. The method for separating a water-in-oil or oil-in-water emulsion by using fly ash as claimed in claim 1, wherein the particle size of the fly ash with a certain particle size in the step (1) is 1 μm to 300 μm.
6. The method for separating a water-in-oil or oil-in-water emulsion by using fly ash as claimed in claim 1, wherein the thickness of the layer of fly ash with a certain thickness in the step (2) is 0.5-8 cm.
7. The method for separating a water-in-oil or oil-in-water emulsion by using fly ash as claimed in claim 1, wherein the thickness of the fly ash layer with a certain thickness in the step (2) is 1-3 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910788394.4A CN110548312A (en) | 2019-08-26 | 2019-08-26 | method for separating water-in-oil or oil-in-water emulsion by using fly ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910788394.4A CN110548312A (en) | 2019-08-26 | 2019-08-26 | method for separating water-in-oil or oil-in-water emulsion by using fly ash |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110548312A true CN110548312A (en) | 2019-12-10 |
Family
ID=68738192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910788394.4A Pending CN110548312A (en) | 2019-08-26 | 2019-08-26 | method for separating water-in-oil or oil-in-water emulsion by using fly ash |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110548312A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111359264A (en) * | 2020-03-06 | 2020-07-03 | 华南理工大学 | Application of coal cinder in separating emulsified oil/water mixture |
| CN111686478A (en) * | 2020-06-30 | 2020-09-22 | 成都大学 | Carbon foam membrane material for oil-water emulsion separation, preparation method and application |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4600501A (en) * | 1983-11-22 | 1986-07-15 | Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of Energy, Mines And Resources | Process for breaking emulsions produced during recovery of bitumens and heavy oils |
| CN105327526A (en) * | 2015-11-30 | 2016-02-17 | 东南大学 | Metal fiber felt used for separating emulsifying oil and modification method and application thereof |
| CN106076248A (en) * | 2016-06-17 | 2016-11-09 | 广东省资源综合利用研究所 | A kind of preparation method of rare earth modified flyash |
| CN107175063A (en) * | 2016-03-09 | 2017-09-19 | 北方民族大学 | A kind of water-oil separating material and its preparation method and application |
| CN108992972A (en) * | 2018-07-23 | 2018-12-14 | 江苏大学 | A kind of on-demand oil-water separation column biomass filler and preparation method thereof |
| CN109157868A (en) * | 2018-10-16 | 2019-01-08 | 西北师范大学 | Method using discarded cigaratte filter preparation water-oil separationg film and the application in water-oil separating |
| CN110079274A (en) * | 2019-06-04 | 2019-08-02 | 南京大学 | A kind of hydrophilic, oleophylic both sexes dust inhibitor and its preparation method and application |
-
2019
- 2019-08-26 CN CN201910788394.4A patent/CN110548312A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4600501A (en) * | 1983-11-22 | 1986-07-15 | Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of Energy, Mines And Resources | Process for breaking emulsions produced during recovery of bitumens and heavy oils |
| CN105327526A (en) * | 2015-11-30 | 2016-02-17 | 东南大学 | Metal fiber felt used for separating emulsifying oil and modification method and application thereof |
| CN107175063A (en) * | 2016-03-09 | 2017-09-19 | 北方民族大学 | A kind of water-oil separating material and its preparation method and application |
| CN106076248A (en) * | 2016-06-17 | 2016-11-09 | 广东省资源综合利用研究所 | A kind of preparation method of rare earth modified flyash |
| CN108992972A (en) * | 2018-07-23 | 2018-12-14 | 江苏大学 | A kind of on-demand oil-water separation column biomass filler and preparation method thereof |
| CN109157868A (en) * | 2018-10-16 | 2019-01-08 | 西北师范大学 | Method using discarded cigaratte filter preparation water-oil separationg film and the application in water-oil separating |
| CN110079274A (en) * | 2019-06-04 | 2019-08-02 | 南京大学 | A kind of hydrophilic, oleophylic both sexes dust inhibitor and its preparation method and application |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111359264A (en) * | 2020-03-06 | 2020-07-03 | 华南理工大学 | Application of coal cinder in separating emulsified oil/water mixture |
| CN111686478A (en) * | 2020-06-30 | 2020-09-22 | 成都大学 | Carbon foam membrane material for oil-water emulsion separation, preparation method and application |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Ali et al. | Design, engineering and analytical perspectives of membrane materials with smart surfaces for efficient oil/water separation | |
| Li et al. | Study on the application of waste bricks in emulsified oil-water separation | |
| Bhushan | Bioinspired oil–water separation approaches for oil spill clean-up and water purification | |
| Xie et al. | Ultrafast separation of oil/water mixtures with layered double hydroxide coated stainless steel meshes (LDH-SSMs) | |
| Ma et al. | Functionalized superwettable fabric with switchable wettability for efficient oily wastewater purification, in situ chemical reaction system separation, and photocatalysis degradation | |
| Wang et al. | Highly-efficient separation of oil and water enabled by a silica nanoparticle coating with pH-triggered tunable surface wettability | |
| Zhang et al. | Cost-effective one-pot surface modified method to engineer a green superhydrophobic sponge for efficient oil/water mixtures as well as emulsions separation | |
| Shami et al. | Multifunctional pH-switched superwetting copolymer nanotextile: surface engineered toward on-demand light oil–water separation on superhydrophilic–underwater low-adhesive superoleophobic nonwoven mesh | |
| CN110697843B (en) | Double-surface special infiltration material for demulsification and separation of oil-in-water emulsion | |
| CN110548312A (en) | method for separating water-in-oil or oil-in-water emulsion by using fly ash | |
| CN111978856A (en) | Super-hydrophilic/underwater super-oleophobic copper mesh, preparation method thereof and application of copper mesh in separation of emulsified oil-in-water | |
| CN107175063B (en) | Oil-water separation material and preparation method and application thereof | |
| Gao et al. | Superhydrophobic copper foam modified with n-dodecyl mercaptan-CeO2 nanosheets for efficient oil/water separation and oil spill cleanup | |
| CN105536554A (en) | Preparation method and application of separation membrane for separating organic mixed liquid on basis of liquid surface tension differences | |
| Qu et al. | Facile fabrication of TiO2-functionalized material with tunable superwettability for continuous and controllable oil/water separation, emulsified oil purification, and hazardous organics photodegradation | |
| Yuan et al. | Robust and switchable superwetting sponge-like membrane: Towards on-demand emulsion separation and aqueous pollutant degradation | |
| Wang et al. | Tune wastepaper to hydrophobic membranes through metal-ion-induced lignocellulose nanofibril crosslinking for oil-water separation | |
| Wang et al. | Constructing a highly tough, durable, and renewable flexible filter by epitaxial growth of a glass fiber fabric for high flux and superefficient oil-water separation | |
| CN108341990A (en) | A kind of simple, the super-hydrophobic composite material of low cost preparation method | |
| CN109647004A (en) | The method for realizing water flowing oil resistance formula water-oil separating using super-amphiphobic or double thin nethike embranes | |
| CN112723458B (en) | Oil-water separation demulsification method based on concrete waste | |
| CN111893766A (en) | Preparation method of multifunctional pH-responsive super-wetting material and application of multifunctional pH-responsive super-wetting material in oil-water separation | |
| Bubakir et al. | Fabrication and surface functionalization of melt electrospun nanofibers for marine oil spill treatment | |
| Zhang et al. | 3D printed cellulose-based high-efficiency oil-water separation mesh | |
| Moatmed et al. | Multifunctional nanofiber membrane for high removal efficiency of biological/organic contaminations and oil-in-water emulsion under gravity-driven separation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191210 |