CN107096384A - Lithium isotope is extracted using centrifugal extractor6Li method - Google Patents
Lithium isotope is extracted using centrifugal extractor6Li method Download PDFInfo
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- CN107096384A CN107096384A CN201710341644.0A CN201710341644A CN107096384A CN 107096384 A CN107096384 A CN 107096384A CN 201710341644 A CN201710341644 A CN 201710341644A CN 107096384 A CN107096384 A CN 107096384A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D59/00—Separation of different isotopes of the same chemical element
- B01D59/22—Separation by extracting
- B01D59/24—Separation by extracting by solvent extraction
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D59/00—Separation of different isotopes of the same chemical element
- B01D59/20—Separation by centrifuging
Abstract
Lithium isotope is extracted the invention discloses one kind application centrifugal extractor6Li method, including extraction section, alkali wash section and back extraction section.The lithium isotope extraction equipment that the present invention is provided is a kind of new and effective centrifugal extraction equipment, after the technology of solvent extraction extraction lithium isotope is combined with equipment of the present invention, drastically increase stage efficiency and separating effect, reduce extraction series, increase treating capacity, the rate of recovery of extractant is improved simultaneously, the problem of high cost present in prior art, small treating capacity and difficult separation is solved, with good market application foreground.
Description
Technical field
The present invention relates to a kind of lithium isotope6Li extracting method, is extracted more particularly, to one kind application centrifugal extractor
Lithium isotope6Li method.
Background technology
Lithium is nature most light metal, and it is in the presence of two kinds of stable isotopes6Li and7Li, relative abundance is respectively6Li is 7.53%,7Li is 92.47%.In nuclear power industry,6Li and7Li has different nuclear reactivity energy, in nuclear material
Occupy critical role.Therefore, the research topic always paid attention to their separation.
The separation method of current lithium isotope has a lot, is broadly divided into chemical method and physical method.Chemical method bag
Method containing lithium amalgam, solvent extraction, ion-exchange chromatography, fractional precipitation and fractional crystallization etc..Physical includes electromagnetic method, fused salt
Electrolysis, electron transfer, molecular distillation and separation by laser etc..Wherein, lithium amalgam method is current separation highest and real throwing
Enter the method for actual production, but the disadvantage of this method, which is a large amount of mercury used in separation process, will bring environment and peace
Full problem；The shortcoming of ion exchange mechansim lithium isotope is to struggle small coefficient, equilibration time length, operation discontinuously and exchange
Agent stability difference etc.；Although laser method improves separation, but this method requires high to technology and material installation, point
It is low from yield.
The solvent extraction of lithium isotope is separated for mercury-free, because lithium ion has very big hydratability, with commonly having
The complexing of machine solvent is very weak, little to the separating effect of lithium isotope, very tired applied to lithium isotope is separated in industry
It is difficult.In addition also there is the shortcomings of solvent selection is more troublesome, cost is higher, separation is smaller, treating capacity is few in this method.In the presence of
On the one hand the reason for above mentioned problem is that system separation is small, and traditional extraction equipment can not two phases were separated well opens, and enters
And need to increase extraction series, cause equipment investment and energy consumption increase, substantially increase processing cost；On the other hand, segregative line
The larger excellent extractant of number is generally the crown ether of more difficult synthesis, cave ethers organic matter, and which increases being extracted into for lithium isotope
This.
The content of the invention
In view of this, the purpose of the present invention is to be extracted in view of the shortcomings of the prior art there is provided one kind application centrifugal extractor
Lithium isotope6Li method, solves the problems such as cost is higher, separation is smaller, treating capacity is few while having reached higher
Recovery rate.
To reach above-mentioned purpose, the present invention uses following technical scheme：
One kind application centrifugal extractor extracts lithium isotope6Li method, including following steps：
(1) extraction section：Lithium hydroxide aqueous solution and extractant are mixed to join centrifugal extractor using volume ratio as 1: 1-6
Extracted；Normal temperature, the extraction of 5-6 stage countercurrents；
(2) alkali wash section：By step 1) extraction gained organic be added in centrifugal extractor carry out alkali cleaning, normal temperature, 2-3 grades
Counter-current extraction；The organic phase and the volume ratio of alkali lye are 1-3: 1；
(3) it is stripped section：By step 2) gained organic phase be stripped in the centrifugal extractor, normal temperature, 4-5 grades
Countercurrent reextraction takes；The organic phase and the volume ratio of strippant are 3-6: 1；Strippant is the sulfuric acid that mass concentration is 25%
Sodium water solution.
Further, step 1) extractant is tributyl phosphate and kerosene, its volume ratio is, tributyl phosphate/coal
Oil=1: 2-4.
Further, step 2) alkali lye is sodium hydroxide solution that mass concentration is 20%-30%.
Further, the centrifugal extractor, including frame, motor, shell, heavy phase weir plate and horizontal cover, the level
Lid and shell are individually fixed in frame, and the side wall of outer shell is provided with heavy out and light phase export, the horizontal cover
Portion is symmetrically arranged with snubber block；The motor is fixed on above horizontal cover；Also include the rotary drum being hung on by axle suspension in horizontal cover,
The rotary drum is fixed on axle by locknut, and the outer wall of described shell is provided with the charging aperture tangent with housing, the charging aperture
Including heavy phase charging aperture and light phase charging aperture, upper inside wall is provided with heavy phase liquid collecting cavity, light phase liquid collecting cavity, and inner wall lower is provided with water conservancy diversion
Leaf, housing bottom inner surface, which is provided with the middle of eddy-current disc, eddy-current disc, is provided with baiting valve；Described axle is customization motor shaft, is motor
Axle is integrally lengthened.
Further, the rotary drum is inside and outside double-layer structure or four-layer structure.
Further, the rotary drum is hung in horizontal cover, its underpart bearing-free, without mechanical seal, and rotary drum is composite wood
Material is molded, and material is polypropylene or perfluoroalkoxy resin.
Further, described shell is the Unitarily molded shaping of composite, and material is polypropylene or perfluoro alkoxy tree
Fat.
Further, the heavy phase weir plate is is divided into multiple segmental arcs, and heavy phase weir plate is spliced by the plurality of segmental arc.
Further, the charging aperture, heavy out, light phase export are using flanged (FLGD) elbow and the ripple of telescopic tube
Line pipe is connected, and pipeline connection is the Unitarily molded shaping of composite, and material is polypropylene or perfluoroalkoxy resin.
Described centrifugal extractor heavy out, light phase export are provided with sampling valve, temperature detection mouthful.
In order to improve extraction efficiency, the centrifugal extractor and extraction process of the present invention are effectively combined, We conducted
Substantial amounts of experimental exploring, it is especially desirable to, it is noted that the selection of extractant, the selection of multi-stage counter current extraction test solvent and parameter
Setting, the selection of multistage back extraction experiment rank and being set in whole effect of extracting for test parameters be particularly important.
Our screenings to extractant below, the setting of multi-stage counter current extraction experiment parameter, the setting of multistage back extraction experiment parameter are real
Test etc. and briefly to enumerate and carry out brief analysis.
Experiment 1：The choice experiment of extractant
Select cave ether [2,2,1]-chloroform, TBP-N503- kerosene, TBP- kerosene as the composition of extractant, change extraction
Agent species and proportioning, carry out pilot plant test.The extractant of zymotic fluid and variety classes and proportioning is separately heated to 30 DEG C, divided
Shake flat experiment is carried out in liquid funnel, after after two-phase completely layering, sampling is detected.Experimental result is as follows.
Shaking flask extraction experiments result under the variety classes extractant of table 1.
It can be seen from the experimental result in upper table：From cave ether [2,2,1]:Chloroform=1:1 as extractant when, extraction yield
Highest, but cave ether extration agent producing process is complicated, cost is high, and is not easily recycled, it is impossible to realize industrial applications, comprehensive
Consider, from TBP：Sulfonated kerosene=1:4 extractant system is optimal.
Experiment 2：Multi-stage counter current extraction is tested
It is 180ml/min in flux, volume ratio is 5: 1, under feeding temperature is normal temperature, the operating condition of counter-current extraction, adopts
With CWL50-M Novel series efficient centrifugal extracters as extraction equipment, change extraction series, observation experiment effect.LiOH water
Solution enters equipment with 30ml/min inlet amount from the heavy phase charging aperture of extractor, and extractant is with 150ml/min inlet amount
Enter equipment from the light phase charging aperture of extractor, after two-phase discharges stabilization, sampling detection, while observing two-phase situation.Extraction
Series is taken to set gradually for 1,2,3,4,5,6,7, repetition aforesaid operations, experimental result such as table 2：
The multi-stage counter current extraction experimental result of table 2.
| Sequence number | Extract series | Extraction yield/% | Separating effect |
| 1 | 1 | 14.23 | Aqueous phase is without muddiness, and organic phase is more muddy |
| 2 | 2 | 26.44 | Aqueous phase is without muddiness, and organic phase is more muddy |
| 3 | 3 | 36.90 | Aqueous phase is without muddiness, organic phase slight haze |
| 4 | 4 | 45.88 | Aqueous phase is without muddiness, organic phase slight haze |
| 5 | 5 | 53.58 | Aqueous phase and organic phase are without muddiness |
| 6 | 6 | 60.16 | Aqueous phase and organic phase are without muddiness |
| 7 | 7 | 61.05 | Aqueous phase and organic phase are without muddiness |
It can be seen from the experimental result in upper table：After extraction,6Li with the form of complex compound enter organic phase in,7Li
Then enter aqueous phase, with the increase of extraction series, extraction yield gradually rises, and separating effect gradually improves, but extracted after 7 grades of extractions
Rate has no obvious increase compared to 6 grades, therefore selection 6 stage countercurrents extraction is optimal.
Experiment 3：Multi-stage countercurrent back extraction experiment
It is 180ml/min in flux, volume ratio is 5: 1, feeding temperature is 35 DEG C, under the operating condition that countercurrent reextraction takes,
Using CWL50-M Novel series efficient centrifugal extracters as back extraction taking equipment, change back extraction series, observation experiment effect.
Strippant enters equipment with 30ml/min inlet amount from the heavy phase charging aperture of extractor, and load organic phases are with 150ml/min
Inlet amount enter equipment from the light phase charging aperture of extractor, after two-phase discharge it is stable after, sampling detection, while observing separation
Effect.Extraction series is set gradually as 1,2,3,4,5,6, repetition aforesaid operations, experimental result such as table 3：
The multi-stage countercurrent of table 3. is stripped experimental result
| Sequence number | It is stripped series | Stripping rate/% | Separating effect |
| 1 | 1 | 21.72 | Aqueous phase and organic phase are without muddiness |
| 2 | 2 | 38.70 | Aqueous phase and organic phase are without muddiness |
| 3 | 3 | 52.03 | Aqueous phase and organic phase are without muddiness |
| 4 | 4 | 62.45 | Aqueous phase and organic phase are without muddiness |
| 5 | 5 | 70.62 | Aqueous phase and organic phase are without muddiness |
| 6 | 6 | 70.88 | Aqueous phase and organic phase are without muddiness |
It can be seen from the experimental result in upper table：By back extraction,6Li is with Li2SO4 form enters aqueous phase, and extractant is obtained
Regeneration.With the increase of back extraction series, stripping rate gradually rises, and good separating effect, is stripped by 5 stage countercurrents
Afterwards, stripping rate can reach 70.62%, and 6 grades of back extraction ratios do not occur substantially increase trend compared to 5 grades, therefore, from 5 grades
Countercurrent reextraction takes most preferably.
Lithium isotope is extracted using CWL-M Series Centrifugals extracter, the LiOH aqueous solution is extracted by 6 stage countercurrents, 3 grades of alkali
Wash, after the back extraction of 5 stage countercurrents,6Li extraction yield has reached 60.16%, and final products are Li2SO4, purity reaches 80%.
The beneficial effects of the invention are as follows：
Beneficial effects of the present invention
1. the centrifugal extractor that the present invention is provided is a kind of extraction equipment of new and effective lithium isotope, with corrosion-resistant
Property strong, delicate structure, the significant advantage such as extraction yield height.Centrifugal extractor housing, rotary drum and pipeline are the overall mould of composite
Type is moulded into, material is polypropylene, and perfluoroalkoxy resin effectively raises the decay resistance of equipment.Centrifugal extractor leads to
Crossing motor drives extraction reactor to carry out extractive reaction, realizes the semi-automatic and integration of extraction, back extraction and pickling, together
When, because the rotary drum of centrifugal extractor used in the present invention is inside and outside double-layer structure or four-layer structure, multilayer separation is conducive to improving
Separative efficiency.
2. the extracting method for the lithium isotope that the present invention is provided, higher degree is obtained by extraction, alkali cleaning and back extraction6Li isotopes, extraction stages preferably phosphoric acid tributyl/kerosene=1: 2, as extractant, both ensure that higher recovery rate, together
When obtain6Li isotopic purities are up to 80%,6Li isotopic purities obtain marked improvement in extracting.Both reduced production into
This, and easy to utilize and industrialized production.
3. lithium isotope extraction equipment of the present invention is a kind of new and effective centrifugal extraction equipment, solvent extraction
After the technology of extraction lithium isotope is combined with equipment of the present invention, stage efficiency and separating effect are drastically increased, is reduced
Extraction series, increases treating capacity, while improving the rate of recovery of extractant, solves cost present in prior art
The problem of high, treating capacity is small and separates difficult, with good market application foreground.
Brief description of the drawings
Fig. 1 is workflow diagram of the invention；
Fig. 2 is the structural representation of the centrifugal extractor of the present invention.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples.
Embodiment 1
One kind application centrifugal extractor extracts lithium isotope6Li method, including following steps：
(1) extraction section：Lithium hydroxide aqueous solution and extractant are mixed to join into centrifugal extractor as 1: 1 using volume ratio to enter
Row extraction；Normal temperature, the extraction of 5 stage countercurrents；The extractant is tributyl phosphate and kerosene, and its volume ratio is, tributyl phosphate/coal
Oil=1: 2；
(2) alkali wash section：By step 1) extraction gained organic be added in centrifugal extractor carry out alkali cleaning, normal temperature, 2-3 grades
Counter-current extraction；The organic phase and the volume of alkali lye are 1: 1；The alkali lye is the sodium hydroxide solution that mass concentration is 20%；
(3) it is stripped section：By step 2) gained organic phase be stripped in the centrifugal extractor, normal temperature, 4-5 grades
Countercurrent reextraction takes；The organic phase and the volume of strippant are 3: 1；Strippant is the sodium sulphate water that mass concentration is 25%
Solution.
Including frame 14, motor 1, shell 13, heavy phase weir plate 4 and horizontal cover 2, horizontal cover 2 and shell 13 are individually fixed in
In frame 14, the side wall of shell 13 is provided with heavy out 5 and light phase export 16, and the bottom of horizontal cover 2 is symmetrically arranged with snubber block
3；Motor 1 is fixed on the top of horizontal cover 2；The centrifugal extractor of the present invention also includes the rotary drum hung on by axle 6 in horizontal cover 2
12, rotary drum 12 is fixed on axle 6 by locknut 7, and the outer wall of shell 13 is provided with the charging aperture 11 tangent with the housing of shell 13, charging
Mouth 11 includes heavy phase charging aperture and light phase charging aperture, and upper inside wall is provided with heavy phase liquid collecting cavity 15, light phase liquid collecting cavity 17, inner wall lower
Provided with water conservancy diversion leaf 8, the bottom interior surface of shell 13 is provided with the middle of eddy-current disc 9, eddy-current disc 9 and is provided with baiting valve 10；Its axis 6 is customization
Motor shaft, is that motor shaft is integrally lengthened.Rotary drum 12 is inside and outside double-layer structure or four-layer structure.Rotary drum 12 is hung in horizontal cover 2,
Its underpart bearing-free, without mechanical seal, rotary drum 12 is that composite is molded, and material is polypropylene or perfluoro alkoxy tree
Fat.Shell 13 be the Unitarily molded shaping of composite, material be polypropylene or perfluoroalkoxy resin.Heavy phase weir plate 4 is equal
It is divided into multiple segmental arcs, heavy phase weir plate 4 is spliced by the plurality of segmental arc.Centrifugical extraction machine inlet 11, heavy out 5, light phase
Outlet 16 is using the bellows connection of flanged (FLGD) elbow and telescopic tube, and pipeline connection is that composite is integrally molded to
Type, material is polypropylene or perfluoroalkoxy resin；Heavy out 5, light phase export 16 are provided with sampling valve, temperature detection mouthful.
As shown in figure 1, giving the workflow diagram of the present invention.(a) it is lithium hydroxide aqueous solution, provides it to extraction
In reactor (b), it is contacted with extractant (c) herein.The raffinate (e) of outflow it will be discharged from novel extraction reactor (b).
The load organic liquid (d) of outflow will provide into alkali cleaning extraction reactor (f) from the extraction reactor (b), make herein it and
Alkali lye (g) contact of offer.Will from the alkali cleaning extraction reactor (f) outflow alkali cleaning extraction raffinate (h) discharge, by pipeline by alkali cleaning
Load organic liquid (i) afterwards is supplied to new reverse extractor (j), it is contacted with the strippant (k) provided herein.It is logical
Piping the regeneration organic liquid (l) of outflow will be provided in organic phase storage tank (n) from the back extraction device (j), Ran Houzai
It is recycled in extraction reactor (b), the aqueous solution (m) of outflow is product from back extraction device (j).The extraction reactor
(b), alkali cleaning extraction reactor (f) and back extraction device (j) are the structure of extraction reactor of the present invention.
Embodiment 2
One kind application centrifugal extractor extracts lithium isotope6Li method, including following steps：
(1) extraction section：Lithium hydroxide aqueous solution and extractant are mixed to join into centrifugal extractor as 1: 6 using volume ratio to enter
Row extraction；Normal temperature, the extraction of 6 stage countercurrents；The extractant is tributyl phosphate and kerosene, and its volume ratio is, tributyl phosphate/coal
Oil=1: 4；
(2) alkali wash section：By step 1) extraction gained organic be added in centrifugal extractor carry out alkali cleaning, normal temperature, 3 grades inverse
Stream extraction；The organic phase and the volume ratio of alkali lye are 3: 1；The alkali lye is the sodium hydroxide solution that mass concentration is 30%；
(3) it is stripped section：By step 2) gained organic phase be stripped in the centrifugal extractor, normal temperature, 4-5 grades
Countercurrent reextraction takes；The organic phase and the volume of strippant are than 6: 1；Strippant is the sodium sulphate that mass concentration is 25%
The aqueous solution.
The structure of the centrifugal extractor is shown in embodiment 1.
Embodiment 3
One kind application centrifugal extractor extracts lithium isotope6Li method, including following steps：
(1) extraction section：Lithium hydroxide aqueous solution and extractant are mixed to join into centrifugal extractor as 1: 5 using volume ratio to enter
Row extraction；Normal temperature, the extraction of 5 stage countercurrents；The extractant is tributyl phosphate and kerosene, and its volume ratio is, tributyl phosphate/coal
Oil=1: 3；
(2) alkali wash section：By step 1) extraction gained organic be added in centrifugal extractor carry out alkali cleaning, normal temperature, 3 grades inverse
Stream extraction；The organic phase and the volume ratio of alkali lye are 2: 1；The alkali lye is the sodium hydroxide solution that mass concentration is 25%；
(3) it is stripped section：By step 2) gained organic phase be stripped in the centrifugal extractor, normal temperature, 4 grades inverse
Stream back extraction；The organic phase and the volume ratio of strippant are 5: 1；Strippant is the sodium sulphate water that mass concentration is 25%
Solution.
The structure of the centrifugal extractor is shown in embodiment 1.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, this area is common
Other modifications or equivalent substitution that technical staff is made to technical scheme, without departing from technical solution of the present invention
Spirit and scope, all should cover among scope of the presently claimed invention.
Claims (10)
1. one kind application centrifugal extractor extracts lithium isotope6Li method, it is characterised in that including following steps：
（1）Extraction section：Lithium hydroxide aqueous solution and extractant are mixed to join into centrifugal extractor as 1: 1-6 using volume ratio to carry out
Extraction；Normal temperature, the extraction of 5-6 stage countercurrents；
（2）Alkali wash section：By step 1）Organic be added in centrifugal extractor of extraction gained carries out alkali cleaning, normal temperature, 2-3 stage countercurrents
Extraction；The organic phase and the volume ratio of alkali lye are 1-3: 1；
（3）It is stripped section：By step 2）Gained organic phase is stripped in the centrifugal extractor, normal temperature, 4-5 stage countercurrents
Back extraction；The organic phase and the volume ratio of strippant are 3-6: 1；Strippant is the sodium sulphate water that mass concentration is 25%
Solution.
2. application centrifugal extractor according to claim 1 extracts lithium isotope6Li method, it is characterised in that step 1）
The extractant is tributyl phosphate and kerosene, and its volume ratio is, tributyl phosphate/kerosene=1: 2-4.
3. application centrifugal extractor according to claim 1 extracts lithium isotope6Li method, it is characterised in that step 2）
The alkali lye is the sodium hydroxide solution that mass concentration is 20%-30%.
4. application centrifugal extractor according to claim 1 extracts lithium isotope6Li method, it is characterised in that it is described from
Heart extracter, including frame（14）, motor（1）, shell (13), heavy phase weir plate（4）With horizontal cover (2), the horizontal cover (2) and
Shell (13) is individually fixed in frame (14), and shell (13) side wall is provided with heavy out (5) and light phase export (16),
The bottom of the horizontal cover (2) is symmetrically arranged with snubber block (3)；The motor (1) is fixed on above horizontal cover (2)；Also include
The rotary drum (12) hung on by axle (6) in horizontal cover (2), the rotary drum (12) is fixed on axle (6) by locknut (7), institute
The outer wall for the shell (13) stated is provided with the charging aperture (11) tangent with housing, and the charging aperture (11) includes heavy phase charging aperture and light
Phase charging aperture, upper inside wall is provided with heavy phase liquid collecting cavity (15), light phase liquid collecting cavity (17), and inner wall lower is provided with water conservancy diversion leaf (8), shell
(13) bottom interior surface, which is provided with the middle of eddy-current disc (9), eddy-current disc (9), is provided with baiting valve (10)；Described axle (6) is customization motor
Axle, is that motor shaft is integrally lengthened.
5. application centrifugal extractor according to claim 4 extracts lithium isotope6Li method, it is characterised in that described turn
Drum (12) is inside and outside double-layer structure or four-layer structure.
6. application centrifugal extractor according to claim 4 extracts lithium isotope6Li method, it is characterised in that described turn
Drum (12) is hung in horizontal cover (2), its underpart bearing-free, without mechanical seal, and rotary drum (12) is that composite is molded, material
Matter is polypropylene or perfluoroalkoxy resin.
7. application centrifugal extractor according to claim 4 extracts lithium isotope6Li method, it is characterised in that described
Shell (13) is the Unitarily molded shaping of composite, and material is polypropylene or perfluoroalkoxy resin.
8. application centrifugal extractor according to claim 4 extracts lithium isotope6Li method, it is characterised in that described heavy
Phase weir plate (4) is is divided into multiple segmental arcs, and heavy phase weir plate (4) is spliced by the plurality of segmental arc.
9. application centrifugal extractor according to claim 4 extracts lithium isotope6Li method, it is characterised in that it is described enter
Material mouth（11）, heavy out（5）, light phase export（16）Using the bellows connection of flanged (FLGD) elbow and telescopic tube, pipe
Road connection is the Unitarily molded shaping of composite, and material is polypropylene or perfluoroalkoxy resin.
10. application centrifugal extractor according to claim 4 extracts lithium isotope6Li method, it is characterised in that described
Heavy out（5）, light phase export（16）It is provided with sampling valve, temperature detection mouthful.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108619909A (en) * | 2018-02-05 | 2018-10-09 | 天津工业大学 | A kind of method of Multistage Membranes chromatography concatenation technology separation lithium isotope |
| CN112058088A (en) * | 2020-09-10 | 2020-12-11 | 中国科学院青海盐湖研究所 | Extraction separation method of lithium isotope based on multi-stage oscillation |
| CN115105857A (en) * | 2021-03-23 | 2022-09-27 | 郑州天一萃取科技有限公司 | Purifying treatment agent and purifying method for tributyl phosphate waste organic phase |
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| CN115105857A (en) * | 2021-03-23 | 2022-09-27 | 郑州天一萃取科技有限公司 | Purifying treatment agent and purifying method for tributyl phosphate waste organic phase |
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Inventor after: Wang Lijun Inventor after: Yang Pengfei Inventor before: Wang Lijun |