CN105435487A - Vertical mixing, clarifying and extracting apparatus, tower extraction method and application of method - Google Patents
Vertical mixing, clarifying and extracting apparatus, tower extraction method and application of method Download PDFInfo
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Abstract
The invention discloses a vertical mixing, clarifying and extracting apparatus, a tower extraction method and an application of the method. The tower extraction method comprises the following steps: determining an organic phase or a water phase entering a tower as a continuous phase or a disperse phase according to an ion system to be extracted; selecting a hydrophilic material as a two-phase disperse contact material in the tower when the organic phase entering the tower is the continuous phase and the water phase entering the tower is the disperse phase; and selecting a hydrophobic material as a two-phase disperse contact material in the tower when the organic phase entering the tower is the disperse phase and the water phase entering the tower is the continuous phase. The tower extraction method can be used to separate or purify metal ions, such as lithium, rubidium and cesium in salt lake brine or seawater. The apparatus and the method are used to make the disperse phase be maximally crushed and aggregated by adopting a material having good wettability with the disperse phase, so the mass transfer in the extraction process is enhanced. A filler having good wettability with the continuous phase can be used to realize alternate use, so crushing-polymerization-recrushing cycle of the disperse phase is well realized, and the mass transfer in the extraction process is enhanced.
Description
Technical field
The invention belongs to the abstraction technique field in chemical separating, be specifically related to a kind of vertical mixing clarifying extraction equipment and tower extracting technological method and application.
Background technology
Solvent extraction technology utilizes liquid extractant process immiscible bi-component or Multi component with it, realizes the mass transfer separation process of Component seperation.Owing to and requiring to select suitable extractant and flow process according to separate object, therefore there is selective height, good separating effect, be easy to realize the advantage such as large-scale continuous production and strong adaptability.Along with the development of solvent extraction technology and the application in various fields.Conventional liquid-liquid extraction equipment is centrifugal extraction equipment, mixer-settler, tower extraction equipment, and this several capital equipment has its pluses and minuses.
Centrifugal extraction equipment has the advantages such as compact conformation, disposal ability are large, smooth running, low in energy consumption, clean and maintenance is convenient, applicable process two-phase density contrast is little, viscosity is large and the system of easy emulsification, but the shortcomings such as centrifugal extraction equipment also exists complex structure, processing request is high, manufacturing cost is expensive, inconvenient maintenance.
Mixer-settler extractor is made up of mixing chamber and clarifying chamber.In mixing chamber, material liquid makes wherein one be broken into drop mutually and be scattered in another phase with the effect of extractant by agitating device, and two-phase fully mixes in mixing chamber, to strengthen phase border contact area and to improve mass transfer rate.After two-phase dispersion stops certain hour in mixing chamber, mass transport process is close to balance, enter opposite side clarifying chamber again, in clarifying chamber, gently, heavy two-phase relies on density contrast to carry out gravitational settling (or rising floating), and under the effect of interfacial tension agglomerate layered, form extraction phase and raffinate phase.It is large that mixer-settler extractor has treating capacity, and liquid phase flow-rate ratio scope is large; Structure is simple, is easy to amplify, and easily realize multistage continued operation, mass-transfer efficiency is high; Easy to operate, adaptable advantage.But shortcoming be mixer-settler extractor according to time horizontal, occupation area of equipment is large, and the solvent reserves in liquid storage box are large, and mixing is not mated with clarification rate, and every grade is equipped with agitating device, and inter-stage need establish delivery pump, and installation cost and operating cost are all higher, and energy ezpenditure is more.And use due to generally uncovered and regulate, equipment is not easily airtight, the loss of solvent and operation link pollute comparatively obvious.
In tower extraction equipment, two-phase is done the flowing of upper and lower continuous flow upstream respectively and is carried out contacting and mass transfer in vertical tower or post.Tower extraction equipment is of a great variety, and the form given according to energy has pulse, of reciprocating vibration etc., has rotating disk, sieve plate, filler etc. according to modular construction form.Turntable extracting tower arranges several ring baffles at a certain distance on tower body wall, installs several rotating disks on center shaft by same spacing, and rotating disk makes with central shaft High Rotation Speed to play stirring action extraction equipment to two-phase.Rotating disc column has the advantages such as structure is simple, flux is large, cost is low, operating maintenance is convenient, but easily causes the serious and liquid flooding of axial backmixing due to the impact of rotating speed.Pulsed extraction tower refers to because External Force Acting makes liquid produce the extraction tower of impulse movement in tower, and the waveform of pulse can be sinusoidal wave or other waveforms.Pulsed extraction equipment efficiency is high, but flux is little, limits its range of application.
Reciprocating oscillating screen plate tower is fixed together at a certain distance by some layers of sieve plate by a central shaft, driven and reciprocating extraction equipment by the transmission mechanism of tower top.Mechanical energy is applied to uniformly and is full of in the whole tower body of feed liquid, and the amplitude of vibration and frequency can regulate, and the waveform of vibration can be sinusoidal wave or other waveforms.Heavy phase from top to bottom, the reverse flow from bottom to top of light phase, in tower, the effect of sieve plate reduces the serious convection current of continuous phase or axial backmixing, and the dispersion-polymerization providing surface area to promote decentralized photo-disperse again, sieve plate first by continuous phase soak, decentralized photo rises or decline with the form of the droplet cluster be separated, in this extraction process, liquid liquid contact surface is constantly updated, and carries out quality transmission.
This kind of extraction tower flux is large and efficiency is higher, and structure is simple, easily amplifies, maintenance and operating cost lower, floor space is few, and power consumption is low, is easy to closed-loop operation.But this kind of extraction equipment uses comparatively common material to be stainless steel at present, its wettability is general, bad to the dispersion effect of decentralized photo.Roughly have its processing method: permanganimetric method, alkali lye air oxidation process, hot-air oxidizing process etc.But can due to the defect of metal surface and stress corrosion cracking (SCC), and make the metal surface after process occur local corrosion to metallic surface process.
CN102772914A patent discloses a kind of air stirring vertical multi-stage mixing clarification extraction equipment.Described device by 3 ~ 30 grade stainless steel materials mixed settler extractor from bottom to top staggered stacking be in series.Every grade of extraction tank is divided into mixing channel and defecator, and mixing channel at different levels and defecator left and right oscillation sorting.Air agitator is provided with in mixing channel.This device is specially adapted to greatly different phase ratio easy emulsifying system, can realize Homogeneous phase mixing, complete extraction under two-phase interface clearly situation.But this new structure more complicated, in tower, material adopts stainless steel, when the organic extractant phase system that process corrosivity is stronger, needs service life to be tested.
CN1256999C patent discloses a kind of bubbling sieve-plate tower extracting process and device therefor thereof.Described method is that heavy phase is flowed into from the top of tower, flow out below tower through some pieces of sieve plates, gently flow into from the below of tower, flow out through the top of some pieces of sieve plates from tower, gas is entered equably bottom extraction tower by distributor at the bottom of tower, flows out from the top of tower after sieve plate.The method reaches the contact of strengthening liquid-liquid diphase and the object of mass transfer, impels two-phase smoothly by sieve aperture, thus has increased substantially heightening efficiency and disposal ability.But the more difficult operation of this implementation method, and very easily formation liquid returns.
CN200960416Y patent discloses a kind of filling and stirring convolution multiple stage of countercurrent liquid-liquid extraction tower, be made up of the extraction phase section of leaving standstill, extraction tower section, the raffinate phase section of leaving standstill three part, adopt Multi-stage stirring and filled plastics ball, described shaft high-quality steel OCr18Ni9Ti processing and manufacturing.Filled plastics ball adopts polytetrafluoroethylmaterial material to make, and filled plastics ball accounts for extraction section volume 50%, and described method makes solvent contact as far as possible with original mixture, improves separating effect.But the method makes treating capacity in tower obviously decline, and reach identical treating capacity, need to increase corresponding tower height.
So the material of extraction filler or sieve plate, should consider the requirement of extraction process to filler or sieve plate, consider that filler or sieve plate material surface are on the impact of extraction process again.Therefore needing to develop a kind of vertical extraction equipment, effectively to solve the problem of vertical extraction equipment height equivalent to a theoretical plate and material corrosion, is the difficult problem that art faces.
Summary of the invention
The object of the invention is, a kind of vertical mixing clarifying extraction equipment and tower extracting technological method and application are provided, the wetability of dispersion to decentralized photo mainly solved in prior art in tower extraction process in tower is bad, makes decentralized photo degree of scatter not high, the technical problem that mass-transfer efficiency is low.
The present invention is as follows for solving the problems of the technologies described above adopted technical scheme:
A kind of vertical mixing clarifying extraction equipment, this equipment comprises tower body, two-phase dispersing contact material, main shaft and vibrating motor, and described main shaft runs through the two ends up and down of described tower body cavity, and described vibrating motor is connected with main shaft, drives motion of main shaft; Described two-phase dispersing contact material is chosen according to the character of the decentralized photo in extraction process; When decentralized photo be organic phase, continuous phase be aqueous phase time, described two-phase dispersing contact material selection hydrophobic material; When decentralized photo be aqueous phase, continuous phase be organic phase time, described two-phase dispersing contact material selection water wetted material.Main shaft top in described tower, by being connected with tower top eccentric wheel, is rotated under the drive of vibrating motor.
In vertical mixing clarifying extraction equipment, heavy phase flows into from the top of tower, and the below from tower after theoretical stages some in tower is flowed out, and gently flows into from the below of tower, flows out after some theoretical stages from the top of tower.In tower, some theoretical stages are in series from bottom to top; Every grade of theoretical stage is divided into mixing section and settling section, and mixing section at different levels and settling section are alternately arranged.
The tower body upper and lower side of described vertical mixing clarifying extraction equipment is all connected with one section of hollow cylinder cavity being more than or equal to tower body diameter as the defecator of heavy phase with light phase.Described defecator and the connected mode of tower body be weld, screw thread is fixed, any one in Flange joint.The outer wall of described heavy phase, light phase defecator is provided with liquid level gauge, and effect is heavy phase, the position, light-phase liquid face of observation tower body upper and lower side settling section.
The material of described tower body is any one in metal, glass or macromolecular material, and tower body inner surface does preservative treatment, and tower body outer surface establishes visual windows.
The structure of described two-phase dispersing contact material includes one in sieve plate, dumped packing, structured packing or at least two kinds of versions.Dumped packing is preferably ring packing, saddle packing, ring saddle packing, Ball-type packing.Structured packing is preferably ripple packing, grid packing, Impulse packing, protruded corrugated sheet packing, screen waviness packings, mellapak packing and net corrugated filling.
The material of described two-phase dispersing contact material is selected from polyvinyl chloride, paste polyvinyl chloride resin, polypropylene, polytetrafluoroethylene (PTFE), ethylene-vinyl alcohol copolymer, nylon.
When decentralized photo be organic phase, continuous phase be aqueous phase time, described two-phase dispersing contact material is selected from polypropylene, polytetrafluoroethylene (PTFE); When decentralized photo be aqueous phase, continuous phase be organic phase time, described two-phase dispersing contact material is selected from ethylene-vinyl alcohol copolymer, nylon.
Also comprise filler in described tower body, described filler infiltrates in continuous phase, and when continuous phase is organic phase, hydrophobic material chosen by filler, and when continuous phase is aqueous phase, water wetted material chosen by filler.
Vertical mixing clarifying extraction equipment as above carries out the method for liquid liquid continuous extration, is reached by following measures:
Described equipment, when adopting aqueous phase as continuous phase, fills material by described equipment charging aperture by aqueous phase in tower, and after tower body part is full of material, aqueous phase stops charging; Open vibrating device, frequency is adjusted to 50 ~ 250 turns/min, is 1.5 ~ 5, is entered to comprise the organic phase of extractant by organic phase import to described equipment according to the flow-rate ratio of organic phase and aqueous phase, treat that interface is set up, the defecator started through bottom is exported by aqueous phase discharges raffinate aqueous phase; Organic extractant phase agent starts defecator via top by after organic phase outlet overflow, and the feed inlet and outlet of organic phase and aqueous phase has extractant and material turnover respectively by above-mentioned flow-rate ratio.
Described equipment, when adopting organic phase to be continuous phase, fills material by described equipment charging aperture by organic phase in tower, and after tower body part is full of material, organic phase stops charging; Open vibrating device, frequency is adjusted to 50 ~ 250 turns/min, is 1.5 ~ 5 according to the flow-rate ratio of organic phase and aqueous phase, by aqueous phase import to described equipment water inlet phase, treats that interface is set up, and the defecator started through bottom is exported by aqueous phase discharges raffinate aqueous phase; After organic extractant phase agent starts the defecator organic phase outlet overflow via top, the feed inlet and outlet of organic phase and aqueous phase has extractant and material turnover respectively by above-mentioned flow-rate ratio.
Described equipment, can be used for single-stage continuous extraction operation or the operation of plural serial stage counter current continuous extraction.When described equipment being used for the operation of plural serial stage counter current continuous extraction, the heavy-phase liquid stream of being derived by upper level mixer-settler introduces the heavy-fluid import of next stage mixer-settler, the light liquid import of next stage mixer-settler introduced by light liquid, after two-phase fully mixes in the vertical mixing clarifying extraction equipment of next stage, the defecator entering upper end and lower end is separately separated.So repeatedly, weight two phase countercurrent flow mass transfer can be realized, reach extract and separate object.
Described equipment, can be used for metal ion in isolation and purification salt lake bittern or seawater as lithium, rubidium, caesium, and with seawater or salt lake bittern for raw material produces metallic salt, as lithium chloride, lithium carbonate, lithium hydroxide, lithium nitrate, cesium chloride, rubidium chloride, cesium nitrate, rubidium chloride, rubidium nitrate.Above-mentioned separation and purification is by carrying out the PROCESS FOR TREATMENT systems such as extract and separate, washing, back extraction and extractant recovery to metal ion compound.In described PROCESS FOR TREATMENT system, organic phase system is made up of extractant and diluent, extractant can adopt tributyl phosphate, 1-phenyl-azo bisnaphthol, 4-sec-butyl-2 (α-methylbenzyl) phenol, the 4-tert-butyl group-2 (α-methylbenzyl) phenol etc., and its mass percent scope can be 5-80%; Diluent includes: kerosene, aviation kerosine, sulfonated kerosene, o-dichlorohenzene, nitroethane etc., its mass percent scope 20-95%.
The present invention also provides a kind of tower extracting technological method, comprises the steps:
Step 1, according to ionic system to be extracted, determining that organic phase or aqueous phase enter in tower is as continuous phase or decentralized photo;
Step 2 is continuous phase entering the organic phase in tower, and when aqueous phase is decentralized photo, the two-phase dispersing contact material in tower is selected from water wetted material; Be decentralized photo entering the organic phase in tower, when aqueous phase is continuous phase, the two-phase dispersing contact material in tower is selected from hydrophobic material.
Further, the water wetted material that described two-phase dispersing contact material is selected from is ethylene-vinyl alcohol copolymer or nylon; The hydrophobic material that described two-phase dispersing contact material is selected from is polypropylene, polytetrafluoroethylene (PTFE).
Further, in described tower, add filler, described filler infiltrates in continuous phase, and when continuous phase is organic phase, hydrophobic material chosen by filler, and when continuous phase is aqueous phase, water wetted material chosen by filler.
Described tower extracting technological method can be applicable to metal ion in isolated or purified salt lake bittern or seawater.The metal ion of institute's isolated or purified is lithium, rubidium, caesium.
Further, organic phase in extraction process is made up of extractant and diluent, described extractant is for being selected from tributyl phosphate, 1-phenyl-azo bisnaphthol, 4-sec-butyl-2 (α-methylbenzyl) phenol, the 4-tert-butyl group-2 (α-methylbenzyl) phenol, and its mass percent scope is 5 ~ 80%; Described diluent is selected from kerosene, aviation kerosine, sulfonated kerosene, o-dichlorohenzene, nitroethane, and its mass percent scope is 20 ~ 95%.
Compared with prior art, beneficial effect of the present invention is as follows:
1, the alternate mixing mass transfer of the tower body two of equipment of the present invention relies on the material wetting property of theoretical plate, select the two-phase dispersion similar to the hydrophilic/hydrophobic of decentralized photo, make decentralized photo reach better dispersion effect, mass transfer enhancement process, improve effect of extracting.
2, tower extracting technological method of the present invention, determine to use corresponding two-phase dispersing contact material according to the decentralized photo in extraction process, select the two-phase dispersing contact material good with decentralized photo effect of impregnation, when compatibility increases, two-phase dispersing contact material can make contacted decentralized photo reach better dispersion effect, is separated into and upgrades little drop; The degree of scatter of decentralized photo is higher, and the contact area of itself and continuous phase is also larger, and such mass transfer effect will be better.
3, device structure of the present invention is simple, and have good automatically cleaning ability, economize energy, cost, be easy to Enlargement Design, installation, maintenance and easy and simple to handle.
4, the invention provides the technical scheme of Isolation and purification metal ion from salt lake bittern or seawater effectively.Extraction experiments through different system proves: it is feasible that technical solution of the present invention extracts metal ion from salt lake bittern and seawater, has good application prospect.
Accompanying drawing explanation
Fig. 1 is the device schematic diagram of the vertical mixing clarifying extraction equipment of the present invention.
Fig. 2 is the theoretical stage two-phase phase-splitting schematic diagram that extraction equipment of the present invention extracts metal ion.
Detailed description of the invention
Embodiment 1
In the vertical mixing clarifying extraction equipment of internal diameter φ 50mm, the sieve diameter of sieve plate is φ 3mm, percent opening 48%, and distance between plates 50mm, has the gap of 0.2mm between column plate and tower.Adopt tributyl phosphate-kerosene (wherein, the mass fraction 80% of tributyl phosphate) as decentralized photo, bittern, as continuous phase, adopts this equipment to carry out the extraction of lithium ion.Composition of tower shell material selects glass, and the main shaft in tower body, sieve plate are two-phase dispersing contact material of the present invention.Due to continuous phase be aqueous phase, decentralized photo is organic phase, therefore selects the polypropylene material of hydrophobic oleophilic oil as the tower inner main axis of two-phase dispersing contact material and sieve plate.Continuous phase, when driving, is first filled sieve-plate tower by described vertical mixing clarifying extraction equipment, then opens decentralized photo pump, and Stationary liquid is than operation.Until decentralized photo after tower top condenses certain thickness liquid layer, by the interface of the position adjustments two-phase of Π type pipe in continuous phase export pipeline in certain altitude, the constant of two-phase interface in liquid trap in operation, should be maintained.By the size regulating DC speed regulator rotating speed to control external energy, observe and decide external energy is on the impact of extraction process.Vibration frequency: 78 times/min, organic phase flow: 175mL/min, bittern flow 50mL/min, Π type pipe height: 20-25cm, icp analysis Li concentration is carried out in sampling, and the extraction efficiency of lithium ion is 100%.
See Fig. 1, this figure is the device schematic diagram of the vertical mixing clarifying extraction equipment of the present invention.Vibration generating arrangement 1 drives the motion of main shaft in tower body 2, plays the effect promoting two-phase mixtures.In liquid-liquid diphase extraction process, heavy-fluid that what density was relatively large is, relatively light be light liquid.Light liquid in light liquid groove 3 enters in tower body by peristaltic pump 7 at the bottom of tower, and the heavy-fluid in heavy-fluid groove 5 enters in tower body from tower top, and after light liquid and heavy-fluid fully mix in tower body, light liquid flows out from light liquid outlet slot 4, and heavy-fluid flows out from heavy liquid exit groove 6.
See Fig. 2, this figure is the theoretical stage two-phase phase-splitting schematic diagram that extraction equipment of the present invention extracts metal ion.Mixing section 1 and settling section 2 is divided in extraction process.In 1 grade of theoretical stage, decentralized photo is polymerized at mixing section 1, then rises in settling section 2 with the form of droplet cluster after fragmentation or decline.
Embodiment 2
In the vertical mixing clarifying extraction equipment of internal diameter φ 50mm, the sieve diameter of sieve plate is φ 2mm, and percent opening 50%, sieve plate is piled up the screen waviness packings that 20mm is high, has the gap of 0.5mm between column plate and tower.Composition of tower shell material selects glass.Continuous phase is di-2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester (the P507)-kerosene organic solution (wherein, the mass percent of P507 is 50%) containing cobalt metal ion, and cobalt content in organic phase is 3.2g/L; Decentralized photo is the oxalic acid aqueous solution of 0.25g/L.Due to continuous phase be organic phase, decentralized photo is aqueous phase, therefore selects hydrophilic material vinyl ethenol copolymer (Eval) as the tower inner main axis of two-phase dispersing contact material and sieve plate.In addition, the screen waviness packings infiltrated in continuous phase selects the material good with continuous phase wetability, and because continuous phase is organic phase, therefore screen waviness packings selects polypropylene (PP).
In extraction process, continuous phase flow is 20mL/h, and decentralized photo flow is 100mL/h.Method of operating is identical with embodiment 1.Gather organic phase sample from organic phase fluid outlet and send analysis, the back extraction ratio of cobalt is 99%.
Embodiment 3
In the vertical mixing clarifying extraction equipment of internal diameter φ 50mm, in tower body, sieve plate piled up the high screen waviness packings of 30mm by lower before this from upper, and then piled up the Ball-type packing in bulk that 30mm is high, alternately pile up until tower top.Composition of tower shell material selects glass.Continuous phase is aqueous phase, and wherein, RbCl concentration 4g/L, CsCl concentration are 3g/L.Adopting sulfonated kerosene 200# to prepare the 4-tert-butyl group-2 (α-methylbenzyl) phenol (purity >95%) concentration is that the organic phase solution of 1mol/L is as decentralized photo.Select the material of hydrophobic oleophilic oil as two-phase dispersing contact material, tower inner main axis and screen waviness packings select polypropylene (PP), and Ball-type packing selects nylon.Extract above-mentioned feed liquid, compare 1:1, method of operating is identical with embodiment 1.Chemical analysis is carried out to raffinate phase, adopts WFX-120 atomic absorption spectrophotometer to measure.The effect of extracting of analog material liquid is better, and the median extraction rate of rubidium reaches 83.1%, and the median extraction rate of caesium reaches 99.9%.
Above are only part preferred embodiment of the present invention, the present invention is not limited in the content of embodiment.To those skilled in the art, can have various change and change in the concept of technical solution of the present invention, any change done and change, all within scope.
Claims (10)
1. a vertical mixing clarifying extraction equipment, this equipment comprises tower body, two-phase dispersing contact material, main shaft and vibrating motor, described main shaft runs through the two ends up and down of described tower body cavity, described vibrating motor is connected with main shaft, drive motion of main shaft, it is characterized in that: described two-phase dispersing contact material is chosen according to the character of the decentralized photo in extraction process; When decentralized photo be organic phase, continuous phase be aqueous phase time, described two-phase dispersing contact material selection hydrophobic material; When decentralized photo be aqueous phase, continuous phase be organic phase time, described two-phase dispersing contact material selection water wetted material.
2. a kind of vertical mixing clarifying extraction equipment as claimed in claim 1, is characterized in that: the material of described two-phase dispersing contact material is selected from polyvinyl chloride, paste polyvinyl chloride resin, polypropylene, polytetrafluoroethylene (PTFE), ethylene-vinyl alcohol copolymer, nylon.
3. a kind of vertical mixing clarifying extraction equipment as claimed in claim 1, is characterized in that: when decentralized photo be organic phase, continuous phase be aqueous phase time, described two-phase dispersing contact material is selected from polypropylene, polytetrafluoroethylene (PTFE); When decentralized photo be aqueous phase, continuous phase be organic phase time, described two-phase dispersing contact material is selected from ethylene-vinyl alcohol copolymer, nylon.
4. a kind of vertical mixing clarifying extraction equipment as claimed in claim 1, it is characterized in that: in described tower body, also comprise filler, described filler infiltrates in continuous phase, and when continuous phase is organic phase, hydrophobic material chosen by filler, and when continuous phase is aqueous phase, water wetted material chosen by filler.
5. a tower extracting technological method, comprises the steps:
Step 1, according to ionic system to be extracted, determining that organic phase or aqueous phase enter in tower is as continuous phase or decentralized photo;
Step 2 is continuous phase entering the organic phase in tower, and when aqueous phase is decentralized photo, the two-phase dispersing contact material in tower is selected from water wetted material; Be decentralized photo entering the organic phase in tower, when aqueous phase is continuous phase, the two-phase dispersing contact material in tower is selected from hydrophobic material.
6. a kind of tower extracting technological method as claimed in claim 5, is characterized in that: the water wetted material that described two-phase dispersing contact material is selected from is ethylene-vinyl alcohol copolymer or nylon; The hydrophobic material that described two-phase dispersing contact material is selected from is polypropylene, polytetrafluoroethylene (PTFE).
7. described a kind of tower extracting technological method as claimed in claim 5, it is characterized in that, described method also comprises: in tower, add filler, and described filler infiltrates in continuous phase, when continuous phase is organic phase, hydrophobic material chosen by filler, and when continuous phase is aqueous phase, water wetted material chosen by filler.
8. the application of the tower extracting technological method metal ion in isolated or purified salt lake bittern or seawater described in any one of claim 5-7.
9. the application of described tower extracting technological method as claimed in claim 8 metal ion in isolated or purified salt lake bittern or seawater, it is characterized in that: the organic phase in extraction process is made up of extractant and diluent, described extractant is selected from tributyl phosphate, 1-phenyl-azo bisnaphthol, 4-sec-butyl-2 (α-methylbenzyl) phenol, the 4-tert-butyl group-2 (α-methylbenzyl) phenol, and its mass percent scope is 5 ~ 80%; Described diluent is selected from kerosene, aviation kerosine, sulfonated kerosene, o-dichlorohenzene, nitroethane, and its mass percent scope is 20 ~ 95%.
10. the application of described tower extracting technological method as claimed in claim 8 metal ion in isolated or purified salt lake bittern or seawater, is characterized in that: the metal ion of described isolated or purified is lithium, rubidium, caesium.
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| CN106435180A (en) * | 2016-07-14 | 2017-02-22 | 中国恩菲工程技术有限公司 | Extraction method for rubidium ions and cesium ions |
| CN110314409A (en) * | 2019-07-29 | 2019-10-11 | 潍坊益华化工有限公司 | A kind of multi-stage continuous extraction tower and technique |
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Application publication date: 20160330 |