CN109603197A - It is a kind of can continuous feeding and discharging supercritical extraction reactor and extracting process - Google Patents
It is a kind of can continuous feeding and discharging supercritical extraction reactor and extracting process Download PDFInfo
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- CN109603197A CN109603197A CN201811633813.9A CN201811633813A CN109603197A CN 109603197 A CN109603197 A CN 109603197A CN 201811633813 A CN201811633813 A CN 201811633813A CN 109603197 A CN109603197 A CN 109603197A
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- extraction
- end cap
- extraction kettle
- valve
- slagging tap
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
- B01D11/02—Solvent extraction of solids
- B01D11/0203—Solvent extraction of solids with a supercritical fluid
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- Extraction Or Liquid Replacement (AREA)
Abstract
It is a kind of can continuous feeding and discharging supercritical extraction reactor, extraction kettle is set on bracket, water bath tube is provided with outside extraction kettle, top cover is provided at the top of the extraction kettle, at least two feed pipe is provided on top cover, inlet valve is provided on feed pipe, charging tube end setting is equipped with the charging end cap of feed pipe, top cap central position is provided with the distance rod of lower end installation scraping wings, distance rod gear is provided on distance rod, distance rod gear is meshed with the motor gear being mounted on motor output shaft, distance rod end is connected with the piston rod of hydraulic cylinder, hydraulic cylinder is connected by solenoid valve with hydraulic pump, extraction kettle bottom is provided at least two residue outlet, valve of slagging tap is provided on residue outlet, the end cap of slagging tap for being equipped with outlet is arranged in tube end of slagging tap, filter layer is provided between residue outlet and end cap of slagging tap；The configuration of the present invention is simple, it is easy to operate, can continuous extraction, use manpower and material resources sparingly, supercritical extract field can be promoted the use of.
Description
Technical field
The invention belongs to the device of physical separation or equipment technical fields, and in particular to it is a kind of can continuous feeding and discharging it is super
Critical extraction kettle and extracting process.
Background technique
When supercritical fluid refers to that substance body is in its critical-temperature and critical pressure above state, at this point, to the state
Gas pressurized, gas will not liquefy, and only density increases, the property with similar liquids, while also retain the performance of gas.It is super
Critical fluids have both the advantages of gas and liquid, and for density close to liquid, solvability is stronger, and viscosity is close with gas,
Diffusion coefficient is much larger than general liquid, is conducive to mass transfer.In addition, supercritical fluid has zero surface tension, it is easy to permeate
It is diffused into the micropore of extract.Therefore, supercritical fluid has good dissolution and mass transfer characteristic, can be with extract quickly
Ground reaches mass transfer balance, realizes efficiently separating for substance.
Supercritical extraction technique is one of the Main way of the following oil extraction.From the point of view of current document report, oil
Rouge extraction process has various features such as " environmentally protective, inexpensive, be easily achieved ", or even by institute, amount of grease manufacturing enterprise
Application is adopted, for producing high-end grease.However, not being widely used yet so far in many decades that the technology has already appeared.
Under traditional supercritical extraction process, for the flow direction of extractant along extraction kettle is prolonged from the bottom to top, extractant import is located at extraction kettle
Bottom, extractant outlet are located on extraction kettle top cover, or positioned at the side of extraction kettle upper end.Although once there is more documents to grind
Study carefully the factors such as the improvement, including extracting pressure, extraction temperature, carbon dioxide flow, extraction time of report supercritical extraction process
Influence to extraction yield, but all it is difficult " persistent ailment " of " production efficiency is relatively low " when improvement supercritical extract grease.
Chinese patent entitled " a kind of quick supercritical extract oil and fat method ", patent No. 201410030959X, work as extraction
When agent flows through extraction kettle from top to bottom, extractant extraction effect can be played but also play the squeezing effect of extractant, extraction effect
Rate can greatly improve, but when extractant flows through extraction kettle from top to bottom, and export pipeline is easy blocking, in material grouts filter cake
Extractant easily goes out into difficulty when layer is thicker, and the material positioned at top is not easy extraction completely, and extraction efficiency is low.
Summary of the invention
Technical problem to be solved by the present invention lies in overcome existing supercritical extraction unit to take out material in extraction process
The shortcomings that troublesome operations such as needing shutdown when slag, pressure release, uncap, secondary charging, then be pressurized, provide a kind of design rationally, structure
Simply, extraction efficiency it is high, it is easy to operate can continuous feeding and discharging supercritical extraction reactor and extracting process.
Solve above-mentioned technical problem the technical solution adopted is that: extraction kettle is set on bracket, is provided with outside extraction kettle
Water bath tube is provided with top cover at the top of the extraction kettle, at least two feed pipe is provided on top cover, be provided on feed pipe into
Expect valve, inlet tube end is provided with charging end cap, and inlet tube is provided in charging end cap, and top cap central position penetrates top cover setting
There is distance rod, distance rod lower end is provided with scraping wings, is provided with distance rod gear on distance rod, distance rod gear and is mounted on electricity
Motor gear on machine output shaft is meshed, and distance rod end is connected with the piston rod of hydraulic cylinder, and hydraulic cylinder passes through electricity
Magnet valve is connected with hydraulic pump, and extraction kettle bottom is provided at least two residue outlet, and valve of slagging tap, residue outlet are provided on residue outlet
End is provided with end cap of slagging tap, and filter layer is provided between residue outlet and end cap of slagging tap, and slag output end, which covers, is provided with outlet, out
Mouth pipe is connected with mass flowmenter and separating still.
Extraction kettle bottom of the invention is provided with 5 residue outlets, and 5 feed pipes are provided on top cover.
Air inlet is machined on scraping wings of the invention.
Filter layer of the invention is that metal powder sintered filter disc or metal work out sieve.
Thermometer is provided on top cover of the invention.
Pressure gauge is provided on top cover of the invention.
It is provided between top cover and extraction kettle of the invention, inlet tube and charging end cap, residue outlet and end cap of slagging tap close
Seal apparatus.
Residue outlet of the invention is small into the horn-like structure gone out greatly.
One kind of the present invention can continuous feeding and discharging supercritical extraction reactor extracting process, comprise the steps of:
S1, control water bath tube carry out extraction kettle water-bath heat preservation, open top cover, material, thrust are rapidly joined into extraction kettle
Bar passes through top cover and is connected with scraping wings, top cover；
S2, solenoid valve is opened, control scraping wings drops to material surface layer, closes solenoid valve, opens motor, and motor drive pushes away
Flitch rotation, smoothes out surface of material, opens solenoid valve control scraping wings and moves down, compaction of the material, at least one feed pipe is made at this time
For extractant import, opens inlet valve and be passed through extractant, extruding extraction is carried out to entire extraction kettle, at least one feed pipe is made
For feed supplement pipe, inlet valve is closed, opens charging end cap, is packed into material, closes charging end cap, opens inlet valve, material is in gravity
With enter extraction kettle under the promotion of extractant, scraping wings rotates again to be moved down, complete charging feed supplement operation；
S3, extractant arrive at separating still after flowing through outlet, mass flowmenter, realize extract and extraction by decompression operation
The separation for taking agent, when mass flowmenter number declines to a great extent, it was demonstrated that the residue outlet at the end is basically completed squeezing extraction, closes
The valve of slagging tap, opening are slagged tap end cap, take out the horn-like filter cake in the residue outlet, after the completion of feeding, are covered end cap of slagging tap, are opened
Corresponding valve of slagging tap, continues the squeezing extraction of the residue outlet, during which at least retains a valve of slagging tap and is in an open state, whole to guarantee
The continuity of a extraction kettle squeezing extraction, remaining valve of slagging tap can be according to the specific of the mass flowmenter registration carried on its outlet
Situation selected section is all closed, and circulation successively takes out the material residue in each residue outlet using the method；
When material is reduced in S4, extraction kettle 2, retain at least one feed pipe as extractant import, remaining each feed pipe
Inlet valve can be closed in whole or in part, opens the charging end cap 5 for being turned off inlet valve, material is added, and feed pipe charging is completed
Afterwards, open corresponding inlet valve, be passed through extractant, the economic benefits and social benefits that gravity and extractant flow should under, the material of feed pipe enters extraction
Kettle is taken, extraction kettle feed supplement is completed in floating and compacting operation by scraping wings, and circulation is fed using the method, until material reaches
To necessary requirement.
The present invention has the advantage that compared with the prior art
1, engine driven supercharging is carried out to material using hydraulic device, the extractant (carbon dioxide) that collaboration enters inner cylinder pushes object
The bed of material moves down, real-time automatic impaction material；Scraping wings pushes material integrally to move down simultaneously, carries out overcritical squeezing to material
Extraction, extraction efficiency are higher.
2, the present invention is turned using the motor gear being meshed with distance rod gear is arranged on motor output shaft by motor
It is dynamic to drive scraping wings rotation, the material in extraction kettle is smoothed out.
3, it is provided at least two feed pipe on top cover of the present invention, by controlling the folding of inlet valve, it can be achieved that a charging
Pipe charging, another feed pipe into extractant function；Extraction kettle bottom is provided at least two residue outlet, is slagged tap by control
The folding of valve realizes that a residue outlet takes out material residue, another residue outlet normally squeezes extraction, extracts to make entirely to squeeze
Cheng Lianxu is uninterrupted.
4, for realize fast slag tapping and increase filter layer area, residue outlet be designed to greatly go out it is small into horn-like structure.
The configuration of the present invention is simple, it is easy to operate, can continuous extraction, use manpower and material resources sparingly, overcritical extraction can be promoted the use of
Take field.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of one embodiment of the invention.
In figure: 1, water bath tube；2, extraction kettle；3, feed pipe；4, inlet valve；5, charging end cap；6, inlet tube；7, pusher
Plate；8, distance rod；9, distance rod gear；10, hydraulic cylinder；11, motor gear；12, motor；13, solenoid valve；14, hydraulic pump；
15, top cover；16, it slags tap valve；17, residue outlet；18, filter layer；19, it slags tap end cap；20, outlet；21, mass flowmenter；22,
Separating still；23, bracket.
Specific embodiment
The present invention is described in further details with reference to the accompanying drawings and examples, but the present invention is not restricted to these implement
Example.
Embodiment 1
In Fig. 1, one kind of the present invention can continuous feeding and discharging supercritical extraction reactor, on bracket 23 install extraction kettle 2, extraction
It takes and is provided with water bath tube 1 outside kettle 2,1 side wall of water bath tube is processed into hollow structure, and hollow structure is provided with water, 1 side wall of water bath tube
Lower end is equipped with the water inlet pipe being connected with 1 side wall of water bath tube, upper end is equipped with the outlet pipe being connected with 1 side wall of water bath tube,
It is fixedly connected at the top of extraction kettle 2 by screw threads for fastening connector and top cover 15 is installed, be equipped between top cover 15 and extraction kettle 2 close
Seal apparatus prevents gas leak in extraction kettle 2 from causing cylinder pressure insufficient, is machined at least two feed pipe 3 on top cover 15, into
Inlet valve 4 is installed, 3 end of feed pipe is equipped with charging end cap 5, is equipped between feed pipe 3 and charging end cap 5 in expects pipe 3
Sealing device prevents gas leak in extraction kettle 2 from causing cylinder pressure insufficient, is equipped with inlet tube 6 in charging end cap 5, extracts
Agent is entered inside extraction kettle 2 by inlet tube 6, and when extraction, at least one feed pipe 3 is used as extractant import, opens inlet valve 4,
Extractant is passed through to extract the material in extraction kettle 2, remaining feed pipe 3 can some or all of closing inlet valve 4, be added
Material after the completion of charging, covers corresponding charging end cap 5, opens corresponding inlet valve 4, falls into material inside extraction kettle 2, preferably
Ground, 2 bottom of extraction kettle of the present embodiment are machined with 5 residue outlets 17,5 feed pipes 3 are machined on top cover 15.
15 center of top cover penetrates top cover 15 and is equipped with distance rod 8, and 8 lower end of distance rod is equipped with scraping wings 7, distance rod
Distance rod gear 9 is installed, distance rod gear 9 is meshed with the motor gear 11 being mounted on 12 output shaft of motor, motor on 7
12 rotation when drive distance rod 8 rotation to drive scraping wings 7 rotate, the material of addition is smoothed out, 8 end of distance rod with
The piston rod of hydraulic cylinder 10 is connected, and hydraulic cylinder 10 is connected by solenoid valve 13 with hydraulic pump 14, and hydraulic pump 14 is this
Invention provides power, moves up and down to drive to move down on distance rod 8 by the piston rod that solenoid valve 13 controls hydraulic cylinder 10
It is dynamic, move up and down scraping wings 7, compaction of the material, after be passed through extractant, the extracting pressure in extraction kettle 2 is kept by booster pump,
Squeezing extraction should be carried out to material by the economic benefits and social benefits of extruding and the extraction of extractant, fine and closely woven air inlet is machined on scraping wings 7,
Ensure that material can not be moved up across scraping wings 7 while extractant can smoothly enter into material.
2 bottom of extraction kettle is machined at least two residue outlet 17, and the residue outlet 17 of the present embodiment is small horn-like into what is gone out greatly
Structure, is equipped with valve 16 of slagging tap in 17 taper end of residue outlet, and 17 thick end of residue outlet is equipped with end cap 19 of slagging tap, residue outlet 17 with go out
Sealing device is installed between slag end cap 19, gas leak is prevented in extraction kettle 2 to cause cylinder pressure insufficient, residue outlet 17 with go out
Filter layer 18 is installed between slag end cap 19, outlet 20 is installed on end cap 19 of slagging tap, outlet 20 is used for extractant and extraction
It takes the discharge of object to collect, mass flowmenter 21 is provided on outlet 20, mass flowmenter 21 is used to monitor the extraction of residue outlet 17
Situation is taken, outlet 20 is connected with separating still 22, and separating still 22 is used for extraction agent and extract.Preferably, of the invention
Filter layer 18 be that metal powder sintered filter disc or metal work out sieve, prevent feed blocking outlet 20, when extraction, at least protect
It stays a valve 16 of slagging tap to be in an open state, collects extract, remaining valve 16 of slagging tap can be closed partly or entirely, open end cap of slagging tap
19, it takes out material grouts filter cake in each residue outlet 17 by the way of auger, after the completion of feeding, covers end cap 19 of slagging tap,
Valve 16 of slagging tap accordingly is opened, squeezing extraction is continued, circulation successively takes out the material cake in residue outlet 17 using the method
Dregs of rice filter cake；The invention can ensure that when feeding or taking out material grouts filter cake, not needing to shut down, not needing in extraction process
Pressure release saves the plenty of time, retains area by the outlet that horn-like slag notch design improves entire extraction kettle, improves
Extraction efficiency is further provided with thermometer and pressure gauge on top cover 15 of the invention.
The extracting process of supercritical extraction reactor for continuous extraction grease of the invention, comprises the steps of:
S1, control water bath tube 1 carry out 2 water-bath of extraction kettle heat preservation, open top cover 15, rapidly join material into extraction kettle 2,
Distance rod 8 passes through top cover 15 and is connected with scraping wings 8, top cover 15；
S2, solenoid valve 13 is opened, control scraping wings 7 drops to material surface layer, closes solenoid valve 13, opens motor 12, electricity
Machine 12 drives scraping wings rotation, smoothes out surface of material, opens the control scraping wings 7 of solenoid valve 13 and moves down, compaction of the material, at this time at least
One feed pipe 3 is used as extractant import, opens inlet valve 4 and is passed through extractant, carries out extruding extraction to entire extraction kettle, until
A few feed pipe 3 is used as feed supplement pipe, closes inlet valve 4, opens charging end cap 5, is packed into material, closes charging end cap 5, opens
Inlet valve 3, material enter extraction kettle 2 under the promotion of gravity and extractant, and scraping wings 7 rotates again to be moved down, and complete charging and mend
Expect operation；
S3, extractant arrive at separating still after flowing through outlet 20, mass flowmenter, by decompression operation realize extract and
The separation of extractant, when 21 number of mass flowmenter declines to a great extent, it was demonstrated that the residue outlet 17 at the end is basically completed squeezing extraction
It takes, closes the valve 16 of slagging tap, opening is slagged tap end cap 19, takes out the horn-like filter cake in the residue outlet 17, after the completion of feeding, is covered
It slags tap end cap 19, opens valve 16 of slagging tap accordingly, continue the squeezing extraction of the residue outlet 17, during which at least retain a valve of slagging tap
16 are in an open state, and to guarantee the continuity of the entire squeezing of extraction kettle 2 extraction, remaining valve 16 of slagging tap can be according on its outlet 20
The concrete condition selected section of 21 registration of mass flowmenter of carrying is all closed, and circulation is successively taken out each using the method
Material residue in residue outlet 17；
When material is reduced in S4, extraction kettle 2, retains at least one feed pipe 3 and be used as extractant import, remaining each feed pipe
3 can close inlet valve 4 in whole or in part, open charging end cap 5, and material is added, and after the completion of feed pipe 3 feeds, open and correspond to
Inlet valve 4, is passed through extractant, the economic benefits and social benefits that gravity and extractant flow should under, the material of feed pipe 3 enters extraction kettle 2, passes through
The floating of scraping wings 7 and compacting operation complete 2 feed supplement of extraction kettle, and circulation is fed using the method, until required for material reaches
It asks.
Claims (9)
1. one kind can continuous feeding and discharging supercritical extraction reactor, extraction kettle is set on bracket, is provided with water-bath outside extraction kettle
Cylinder, it is characterised in that: be provided with top cover at the top of the extraction kettle, at least two feed pipe is provided on top cover, is set on feed pipe
It is equipped with inlet valve, inlet tube end is provided with charging end cap, and inlet tube is provided in charging end cap, and top cap central position penetrates top
Lid is provided with distance rod, and distance rod lower end is provided with scraping wings, and distance rod gear, distance rod gear and peace are provided on distance rod
Motor gear on motor output shaft is meshed, and distance rod end is connected with the piston rod of hydraulic cylinder, hydraulic cylinder
It is connected by solenoid valve with hydraulic pump, extraction kettle bottom is provided at least two residue outlet, it is provided with valve of slagging tap on residue outlet,
Tube end of slagging tap is provided with end cap of slagging tap, and filter layer is provided between residue outlet and end cap of slagging tap, and slag output end is covered and is provided with out
Mouth pipe, outlet are connected with mass flowmenter and separating still.
2. one kind according to claim 1 can continuous feeding and discharging supercritical extraction reactor, it is characterised in that: the extraction
Bottom portion is provided with 5 residue outlets, and 5 feed pipes are provided on top cover.
3. one kind according to claim 1 can continuous feeding and discharging supercritical extraction reactor, it is characterised in that the pusher
Air inlet is machined on plate.
4. one kind according to claim 1 can continuous feeding and discharging supercritical extraction reactor, it is characterised in that: the filtering
Layer is that metal powder sintered filter disc or metal work out sieve.
5. one kind according to claim 1 can continuous feeding and discharging supercritical extraction reactor, it is characterised in that: the top cover
On be provided with thermometer.
6. one kind according to claim 1 can continuous feeding and discharging supercritical extraction reactor, it is characterised in that: the top cover
On be provided with pressure gauge.
7. one kind according to claim 1 can continuous feeding and discharging supercritical extraction reactor, it is characterised in that: the top cover
Sealing device is provided between extraction kettle, inlet tube and charging end cap, residue outlet and end cap of slagging tap.
8. one kind according to claim 1 can continuous feeding and discharging supercritical extraction reactor, it is characterised in that: described slags tap
Guan Wei little into greatly go out horn-like structure.
9. according to one kind described in the claims 1~8 can continuous feeding and discharging supercritical extraction reactor extracting process, it is special
Sign is to comprise the steps of:
S1, control water bath tube carry out extraction kettle water-bath heat preservation, open top cover, material are rapidly joined into extraction kettle, distance rod is worn
It crosses top cover to be connected with scraping wings, top cover；
S2, solenoid valve is opened, control scraping wings drops to material surface layer, closes solenoid valve, opens motor, and motor drives scraping wings
Rotation smoothes out surface of material, opens solenoid valve control scraping wings and moves down, compaction of the material, at least one feed pipe is as extraction at this time
Agent import is taken, inlet valve is opened and is passed through extractant, extruding extraction is carried out to entire extraction kettle, at least one feed pipe is as benefit
Expects pipe closes inlet valve, opens charging end cap, is packed into material, closes charging end cap, opens inlet valve, material is in gravity and extraction
It takes and enters extraction kettle under the promotion of agent, scraping wings rotates again to be moved down, and charging feed supplement operation is completed；
S3, extractant arrive at separating still after flowing through outlet, mass flowmenter, realize extract and extractant by decompression operation
Separation, when mass flowmenter number declines to a great extent, it was demonstrated that the residue outlet at the end be basically completed squeezing extraction, close should go out
Slag valve, opening are slagged tap end cap, take out the horn-like filter cake in the residue outlet, after the completion of feeding, are covered end cap of slagging tap, are opened corresponding
Valve of slagging tap, continue the squeezing extraction of the residue outlet, during which at least retain a valve of slagging tap and be in an open state, to guarantee entire extraction
The continuity of kettle squeezing extraction is taken, remaining valve of slagging tap can be according to the concrete condition of the mass flowmenter registration carried on its outlet
Selected section is all closed, and circulation successively takes out the material residue in each residue outlet using the method；
When material is reduced in S4, extraction kettle 2, retain at least one feed pipe as extractant import, remaining each feed pipe can be complete
Inlet valve is closed in portion or part, opens the charging end cap 5 for being turned off inlet valve, and material is added and beats after the completion of feed pipe charging
Open corresponding inlet valve, be passed through extractant, the economic benefits and social benefits that gravity and extractant flow should under, the material of feed pipe enters extraction kettle,
Extraction kettle feed supplement is completed in floating and compacting operation by scraping wings, and circulation is fed using the method, until needed for material reaches
It is required that.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811633813.9A CN109603197B (en) | 2018-12-29 | 2018-12-29 | Supercritical extraction kettle capable of continuously feeding and discharging materials and extraction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811633813.9A CN109603197B (en) | 2018-12-29 | 2018-12-29 | Supercritical extraction kettle capable of continuously feeding and discharging materials and extraction method |
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| CN109603197A true CN109603197A (en) | 2019-04-12 |
| CN109603197B CN109603197B (en) | 2021-04-02 |
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ID=66016146
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114405058A (en) * | 2022-01-21 | 2022-04-29 | 南通市华安超临界萃取有限公司 | Supercritical carbon dioxide extraction device capable of improving material replacement efficiency |
| CN114870429A (en) * | 2022-04-25 | 2022-08-09 | 贵州航天乌江机电设备有限责任公司 | Wall thickness variable continuous extractor barrel and continuous extractor |
| CN115445235A (en) * | 2022-09-19 | 2022-12-09 | 烟台中亚至宝药业有限公司 | Supercritical fluid extraction device and method for semen cuscutae total flavonoids |
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| CN204815780U (en) * | 2015-08-01 | 2015-12-02 | 陕西森弗高科实业有限公司 | It puts to prevent floating canning of drawing of blockking up |
| CN106807112A (en) * | 2015-11-27 | 2017-06-09 | 王竞甜 | Novel fluid shunt cylinder |
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| CN86106852A (en) * | 1985-09-10 | 1988-04-20 | 维他命公司 | The method and apparatus of extraction liquids from solid |
| US20170240841A1 (en) * | 2013-01-04 | 2017-08-24 | Matthew Ellis | Continuous-flow extraction system and method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114405058A (en) * | 2022-01-21 | 2022-04-29 | 南通市华安超临界萃取有限公司 | Supercritical carbon dioxide extraction device capable of improving material replacement efficiency |
| CN114870429A (en) * | 2022-04-25 | 2022-08-09 | 贵州航天乌江机电设备有限责任公司 | Wall thickness variable continuous extractor barrel and continuous extractor |
| CN114870429B (en) * | 2022-04-25 | 2023-08-04 | 贵州航天乌江机电设备有限责任公司 | Wall thickness variable continuous extraction device cylinder and continuous extraction device |
| CN115445235A (en) * | 2022-09-19 | 2022-12-09 | 烟台中亚至宝药业有限公司 | Supercritical fluid extraction device and method for semen cuscutae total flavonoids |
| CN115445235B (en) * | 2022-09-19 | 2023-12-29 | 烟台中亚至宝药业有限公司 | Supercritical fluid extraction device and method for total flavonoids of semen cuscutae |
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| CN109603197B (en) | 2021-04-02 |
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