WO1994016791A1 - Procede d'extraction par solvant et unite d'extraction a cet effet, ainsi qu'appareil en ligne realise avec de telles unites d'extraction, notamment avec recuperation du solvant - Google Patents

Procede d'extraction par solvant et unite d'extraction a cet effet, ainsi qu'appareil en ligne realise avec de telles unites d'extraction, notamment avec recuperation du solvant Download PDF

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Publication number
WO1994016791A1
WO1994016791A1 PCT/DE1994/000039 DE9400039W WO9416791A1 WO 1994016791 A1 WO1994016791 A1 WO 1994016791A1 DE 9400039 W DE9400039 W DE 9400039W WO 9416791 A1 WO9416791 A1 WO 9416791A1
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WO
WIPO (PCT)
Prior art keywords
extraction
solvent
overflow
unit
sample
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/DE1994/000039
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German (de)
English (en)
Inventor
Witoslaw Wenta
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
C Gerhardt GmbH and Co KG
Original Assignee
C Gerhardt Fabrik und Lager Chemischer Apparate GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by C Gerhardt Fabrik und Lager Chemischer Apparate GmbH and Co KG filed Critical C Gerhardt Fabrik und Lager Chemischer Apparate GmbH and Co KG
Publication of WO1994016791A1 publication Critical patent/WO1994016791A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L99/00—Subject matter not provided for in other groups of this subclass
    • 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
    • B01D11/0215—Solid material in other stationary receptacles
    • 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
    • B01D11/0292—Treatment of the solvent
    • B01D11/0296—Condensation of solvent vapours
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/34—Purifying; Cleaning
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/40—Concentrating samples
    • G01N1/4055—Concentrating samples by solubility techniques
    • G01N2001/4061—Solvent extraction

Definitions

  • the present invention relates to a method for solvent extraction using an extraction unit consisting of a sample vessel for receiving the extraction solvent and a sample basket for the sample to be examined, from a heating plate for the sample vessel, and from a water cooler for the rising vapors of the extraction solvent, whereby an upward open overflow unit with a collection space open to the water cooler with a defined limited volume is arranged in a center piece of the extraction unit between the water cooler and the sample vessel above the sample basket, which has an outlet with a drain pipe to one has outer solvent collecting vessel and an inflow or overflow to the sample vessel, and wherein when the overflow unit is closed, the extraction by boiling the sample in the extraction solvent by means of liquid extraction and by additional leaving steam extraction as well as the collection of the solvent for solvent recovery takes place, - and whereby either on the one hand through the drain on the Sequence of the changeover from liquid to steam extraction by lowering the level in the solvent vessel below the.
  • the sample and the changeover to the removal of the collected extraction solvent is carried out, and - in the boiling phase, the rising solvent vapors condense in the water cooler and are completely returned to the sample vessel as condensate in the overflow unit and via their overflow or inflow with the drain closed, as well as in the steam phase the extraction solvent overflows or runs off in the overflow unit, so that the wetted sample is washed out during steam extraction, or that after the boiling phase the sample basket is only adjusted above the liquid level via a longitudinal adjustment device of the extraction solvent is drawn in order to carry out the washing out of the sample in the condensed solvent vapors during the steam extraction, the level then then being reduced.
  • the collection space has a ' defined known volume, which is limited by the arrangement of the overflow to the sample vessel, and also a drain to the outer solvent collecting vessel.
  • the entire level of the extraction solvent is carried out by a continuous outflow process of the vapors of the extraction solvent that collect in the funnel-shaped overflow unit and condense on the water cooler by merely lowering the level of the external barrier to be actuated ⁇ or control valve, which is opened via a time program until the solvent level is below the sample, for example during the transition from liquid to vapor extraction. Due to its weight, the extraction solvent runs independently through the open shut-off or control valve into the outer, lower-lying solvent collecting vessel.
  • the sample basket is only removed without lowering the Liquid levels above this with a length adjustment. pulled towards.
  • a simple overflow unit is used, which only serves to collect the solvent to be recovered.
  • the extraction solvent drips directly through a lower opening into the sample vessel.
  • the object of the invention is therefore to provide a method and a device for solvent extraction, in which a change in the extracted part during the lowering and collection of the extraction solvent to be recovered, in particular also in the case of automated extraction units in multi-digit operation, is avoided as. no different residual amounts of solvent are formed.
  • the invention is based on the idea of improving the known methods in such a way that the setting and changing of the liquid level in the sample vessel programs for solvent extraction and / or for lowering the liquid level during the solvent recovery of the extraction solvent, in particular predetermined, repeatable amounts takes place, the residual amounts of the extraction solvent occurring after a certain time being reproducible within narrow limits. It should, in particular, certain "residual amounts of the extraction solvent has been present with the extracted part in the sample container after the end of solvent recovery. In this respect, a change in extracted components (eg fats) during the lowering and collection of the extraction solvent to be extracted in automated, multi-digit operation is particularly intended existing series device can be avoided.
  • extracted components eg fats
  • a method according to claim 1 is provided in a method of the type mentioned at the outset.
  • the extraction solvent evaporates and several equal amounts by repeated complete
  • the filling and emptying of the collecting space of the overflow unit is collected, lowered and passed into the outer solvent collecting vessel until only a predetermined remainder of the extraction solvent with the constituent to be extracted is present in the sample vessel, and b) that the collecting space of the Overflow unit is then emptied for a short time after filling its predetermined defined volume in order to lower the liquid level of the solvent to a remaining amount predetermined at a certain defined point in time, even if the energy supply is imprecise the collecting space also includes the amount of extraction solvent present in the drain pipe to the solvent collecting vessel upstream of a siphon valve or a suction pump, and that c) subsequently or later the residual solvent is evaporated without changing the component then extracted.
  • a new lowering principle is thus used in the transition between the boiling phase and the vapor phase and for collecting the extraction solvent to be recovered in the overflow unit, by arranging one with a collecting space in the sample vessel instead of a mere funnel-shaped overflow unit, which has a defined amount of the evaporation solvent not only can be absorbed, but which can also be repeatedly removed. This amount is collected several times in accordance with the type of solvent and is emptied exactly several times at certain times. For solvent recovery, it is provided that the solvent is only lowered and discharged into the collection container until there is only a residue of preferably 1-2 mm of solvent in the sample vessel.
  • the sample vessel is lifted off the heating plate, for example slightly (5 mm), so that the remaining solvent evaporates without the component to be extracted changing, ie without the fat to be extracted being oxidized, for example.
  • the present invention is therefore based on the idea that an exact lowering of the level can be achieved if a quantized emptying of the overflow unit or of the individual collecting spaces having a predetermined constant volume is possible, and an emptying at certain times, thus takes place in suitably short periods of time, for example by means of a suction or compressed air pulse.
  • Such short emptying times of the extraction solvents present in the collecting rooms with certain predetermined volumes are possible that a different drip rate which arises due to inaccurate energy supply does not fail. has an impact. It is possible that. Limit the error limit with regard to the amount of the remaining amount of the extraction solvent with the extracted constituent (eg fat) in the sample vessel to below + 1 / -1%.
  • the liquid level must be reduced discontinuously, several times with the time required to empty the collecting space, to the level of steam extraction or the residual solvent quantity, between the beginning there are sufficient periods of time for the filling and the subsequent emptying and the emptying takes place only at certain points in time, that is to say in such short-term periods of time that the quantity of the extraction solvent drawn through the collecting space cannot be falsified despite the indefinite supply of energy and heating.
  • control of the short-term emptying of the collecting space takes place in each case by a pressure emptying, a pressure medium being supplied above the overflow unit in the water cooler which is open at the top, or by the suction effect of a pump connected to the outflow of the collecting space, which only works during the discharge of the defined volume of the extraction solvent is effective in the collecting space.
  • the defined volume of extraction solvent accommodated in the collecting space is pressed through the drain pipe connected to the outlet of the collecting space and leading to the outer solvent collecting vessel. It is preferably provided in this pipe section a U-pipe section of a suitable height, so that the extraction solvent present in the collecting space can be removed without a shut-off valve only during the short supply of compressed air. It is also possible to empty the collecting space by arranging a diaphragm pump in the drain pipe and, for example, by arranging the solvent collecting vessel below the collecting space of the overflow unit and by opening a shut-off valve in the drain pipe.
  • the setting of the different extraction phases is carried out at defined times by a time programmer. It is thereby ensured that there are no different residual amounts of extraction solvents in the different extraction units, so that this is at the bottom of the sample vessel Permanent, extracted fat is not oxidized.
  • the extraction unit is particularly suitable for determining the fat of a sample.
  • the device according to claim 9 is used to carry out the method according to the invention for solvent extraction according to the new lowering principle and the new evaporation phase for solvent recovery. Thereafter, during the lowering phase, defined amounts of extraction solvent are used in each case by the overflow unit used with a collecting space through the defined volume of the collecting space after the collection space has been emptied, these being discharged exactly by emptying the collection space in each case. The remaining amount of extraction solvent thus arises exactly according to a previously feasible calculation.
  • Fig. 1 A longitudinal section through an extraction unit according to a preferred embodiment of the invention, showing a sample vessel mounted on a hot plate with a water cooler arranged above it, and a center piece of the extraction unit arranged between them, in which an opening that opens upwards below the water cooler Overflow unit is arranged, which comes to rest centrally above the sample vessel and the sample basket.
  • FIG. 2 A side view of the cylindrical overflow unit with the lower outlet of the extraction unit according to FIG. 1.
  • FIG. 3 A longitudinal section through the overflow unit according to section AA of FIG. 2, showing one in the lower half. created collection space, an overflow channel extending laterally therefrom from an overflow to the underside of the overflow unit and a supply space located above the collection space.
  • FIG. 4 A top view of the top of the overflow unit according to FIG. 2, showing the inlet openings of the overflow channels, which are arranged over uniform angular sections on a concentric circle around the cylindrical collecting space.
  • FIG. 5 A top view of the underside of the overflow unit according to arrow B of Fig. 2; showing the outlets of the overflow channels, which are laterally distributed in a concentric ring around the central drip tip of the underside.
  • FIG. 6 The front view of a row device composed of 6 identical extraction units according to FIG. 1, showing a device for lifting the sample vessel from the heating plate.
  • the water cooler (5) is connected to a cooling water circuit via connections (31).
  • a preferred extraction method, in particular for determining the fat content, is described below: To carry out the first extraction phase (liquid extraction), the sample vessel (2) is first filled with solvent up to level I in accordance with FIG. 1, and the sample becomes then entered into the sample basket (3), this over a seal or a conical section of the Middle piece (6) is flanged.
  • the solvent is brought to a boil by heating the solvent with the heating plate (4), the rising solvent vapors condensing from the water cooler (5) and dropping into the cylindrical overflow unit (7).
  • the outlet (8) of the overflow unit (7) remains closed, as a result of which the condensate collected rises in the overflow unit (7) and flows out at an overflow (29) into the sample vessel, which flows inside the overflow unit in a step-like manner
  • Overflow web (32) is created at the transition between a lower collecting space (13) and a supply space (21) widening opposite it.
  • the overflow (29) consists of 11 inlet openings (30) which are led to the underside (18) of the overflow unit through overflow channels (19 a, b, c) into the outlet openings there.
  • the cooking phase is controlled by a time programmer (not shown). Part of the fat to be extracted from the sample is boiled and dissolved.
  • the solvent is lowered from level I to level II by opening drain (8) according to FIG. Since the outlet (8) is created in a lower recess (22) in the bottom part of the collecting space (13), the entire solvent which is found exclusively in the collecting space (13) is removed via the outlet pipe (9) emanating from this outlet (8).
  • the overflow unit is in an outer solvent collecting vessel (10) in the shortest possible, pre-calculated time.
  • the overflow unit (7) according to the present invention is designed such that the solvent discharge due to the installation of the overflow only from a predetermined space with a certain defined Volume, namely the collecting space (13) takes place, which is so far made extremely accurate to hold a defined amount of solvent. This amount is then emptied as briefly as possible, depending on the type of solvent.
  • the lowering of the solvent is also controlled in time by a time programmer until the solvent level is below the sample or the sample basket (3). A precisely determined amount of solvent is removed by repeatedly filling and emptying the collecting space (13).
  • drain pipe (9) is only designed with an overflow (15) which lies above the maximum liquid level of the extraction solvent located in the collecting space (13).
  • the overflow (15) is Pipe section formed with a central pipe section above the maximum liquid level. The lateral webs of the U-bend are connected to the drain pipe (9).
  • the extraction solvent has liquid level II, with steam extraction (washing phase) starting.
  • the sample hovers over the boiling solvent in the solvent vapor and is washed out by the condensed pure extraction solvent flowing back from the water cooler.
  • the extraction solvent overflowing from the overflow channels (19a, b, c ...) drips continuously from the bottom (18) of the overflow unit, which converges in the middle to form a drip tip (22), onto the sample placed in the sample basket (3).
  • This washing phase by steam extraction is also timed using a time programmer.
  • a fifth extraction phase there is then residual evaporation with reduced energy input through the heating plate (4).
  • the sample vessel (2) is lifted from the heating plate (4) by approx. 5 mm so that the remaining extraction solvent can evaporate without the fat oxidizing.
  • the structure of the cylindrical overflow unit (9) to be used in the extraction units (la, b) is clearly shown in FIGS. 2-5.
  • the cylindrical overflow unit is made of Teflon, in particular with respect to the design of the collecting space (13), and is turned with extreme accuracy on its outside an upper and lower collar projecting outwards.
  • the outlet (8) is created, which according to Figure 3 through the side wall (24)
  • Overflow unit is guided by means of a drain hole (23) opening into the bottom part of the collecting space (13).
  • the overflow unit has a height of approximately 10 cm and a diameter of 6 cm.
  • the collection chamber (13), which is also cylindrical in its lower half, has a height of approximately 3 cm and a diameter of 2.5 cm.
  • the overflow (29) of the overflow unit (7) to the sample vessel (2) is placed laterally above the collecting space (13).
  • the overflow (29) is formed by an overflow web (32) running laterally above the outer wall of the collecting space and overflow channels (19a, b, c ...) extending to the underside of the overflow unit.
  • a total of 11 overflow channels (19a, b, c ...) are created over uniform angular sections on a concentric circle around the cylinder-shaped outer wall of the collecting space (13).
  • An overflow channel is omitted only in the area below the outlet (8) or the Abifußbohrung (23).
  • the arrangement of the overflow channels can also be seen in FIG. 4 in a top view of the overflow unit. These are on the overflow web (32) of the upper one Feed space (21) is created which, like the lower collecting space (13), opens upwards in the direction of the water cooler (15). The bottom part of the collecting space (13) can also be seen, the drain hole (23) of the outlet (18) opening into the recess (22) there leading to the outer solvent collecting vessel which is connected via the drain pipe (9) to the Pipe piece trained overflow is performed.
  • the same extraction units (la, b) are arranged in the series device (25) there.
  • the individual extraction and lowering phases I, II, III, IV and V are carried out at the same time, with differences in the heating of the sample vessels and in the outflow through the outflow pipes (9) to the solvent collecting vessel (10) being exact do not impede the uniform lowering of the extraction solvent in the individual extraction units. In this respect, it is impossible for the extracted fat present in the sample vessels (2) to burn.
  • the two compressed air cylinders (26) on the right and left are used to lift the sample vessels (2) from the heating plate (4), which have a guide rail (27) and thus guide sleeves (28) around the edge of the sample vessels (2) raise and lower.
  • the extraction method explained on the basis of the extraction unit according to FIGS. 1 - 6 is basically based on the lowering principle according to the invention and the lowering of the solvent to a certain residue and the evaporation of this residue with a reduced output of the heating plates also basically to that mentioned at the beginning Soxtec solvent extraction method applicable.
  • the devices according to the invention can be used without reservation in the handling of extraction solvents which are at risk of explosion and are still expensive to purchase.
  • the liquid level (II) for steam extraction is thus adjusted according to the invention, that the collecting space (13), which has a measuring volume of 15 ml, for example, is emptied three times and filled four times, so that a quantity of liquid of 60 ml is removed from the sample vessel (2). It is possible to carry out the emptying within 3 seconds, while the filling of the collecting space takes place within 4 minutes, assuming that the collecting spaces fill up in 3 1/2 minutes +/- 20 seconds depending on the energy supply. This ensures that the overflow units of all extraction units are completely filled.
  • the remaining 90 ml of extraction solvent can be removed exactly after the steam extraction has been completed by emptying the collection space seven times after prior filling. In this respect, it is ensured that the same residual amount of extraction solvent is always present in a certain extraction unit after a certain time and thus precise timing and issuing of the heating of the extraction units a serial device is possible. In this respect, it is avoided that the components of the sample to be extracted or those already extracted (eg fats) are changed in the automated multi-digit operation of a series device and that at the end of the extraction different residual amounts of extraction solvents are inadmissibly present in the extraction units.
  • the emptying of the collecting space can take place not only by means of a pulsed compressed air supply by means of compressed air but also by means of argon or nitrogen or other gas mixtures which are compatible with the explosive extraction agent for fat extraction.
  • precise time control of the overflow, lowering, draining and draining processes of the extraction solvent is possible via siphon valves with electronic control and pneumatic drive.
  • the device according to the invention thus dispenses with the need for an exact flow measurement of discontinuously or continuously concluding amounts of extraction solvent and the regulation of this outflow. It is therefore unnecessary to use devices which can only be used with reservations when handling explosion-hazardous extraction solvents and which are expensive to purchase.
  • an extraction unit (36) is shown schematically in longitudinal section. Representation of the extraction process with the different extraction liquid levels (I), (II) and (III) to be set. in which the emptying of the collecting space (13), which has to be repeated several times, does not take place through a pressure medium supply via the open water cooler but through the suction effect of a hose pump (35).
  • the hose pump (35) is connected to the outlet (8) of the collecting space (13) or the drain pipe (9) there, which is led to the solvent collecting vessel (10).
  • the siphon valve with the overflow (15) and the U-pipe section installed in the drain pipe (9) is not used in the extraction unit (la) of FIGS. 1-6.
  • the peristaltic pump (35) has two spaced pump rollers (30) which are rotated by a pump rotor (34) when the pump is switched on, and only during this time in the collecting space and in the intermediate piece of the drain pipe (9) between the pump and remove the extraction solvent from the outlet (8).
  • the peristaltic pump is only operated for a certain time, which is necessary in order to discharge the predetermined amount of extraction solvents in accordance with the filling volume of the collecting space (13).
  • each individual extraction unit has its own peristaltic pump (35), so that the quantities of liquid in different collecting rooms of the extraction units cannot influence one another when they flow away.
  • the drain pipe (9) is guided directly from the outlet of the hose pump (35) into the solvent collecting vessel (10).
  • the peristaltic pump (35) automatically represents a block for the outflow of the extraction solvent in the collecting space (13), provided the peristaltic pump is not in operation.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Clinical Laboratory Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
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  • Molecular Biology (AREA)
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Abstract

L'invention concerne un procédé et une unité d'extraction (1a) permettant de procéder à une extraction par solvant et de déterminer un composant à extraire d'un échantillon. L'échantillon est porté à ébullition dans l'unité d'extraction conjointement avec le solvant, tout en procédant à une extraction de liquide. Une extraction de la vapeur se trouvant au-dessus du niveau du liquide du solvant d'extraction est ensuite effectuée. Un peu plus tard, le solvant d'extraction qui s'évapore et qui se condense sur le réfrigérant à eau (5), est recueilli dans une unité de déverse (7) comportant une chambre collectrice (13) et est acheminé vers l'extérieur à des fins de récupération dans un réservoir collecteur de solvant (10). Une telle diminution du niveau du solvant peut également être effectuée pour passer de l'extraction de liquide à l'extraction de vapeur. On sait comment maintenir l'orifice de sortie (8) de l'unité de déverse ouvert par l'intermédiaire d'une soupape de régulation et d'un programmateur de minutage jusqu'à ce que le niveau de solvant recherché soit atteint dans un processus de diminution continue. Les volumes de solvant d'extraction évacués ne sont pas reproductibles. Ils peuvent s'évaporer prématurément et le composant extrait peut varier dans le volume résiduel. Le chauffage du récipient qui contient l'échantillon (2) n'est pas précis. Des transferts de chaleur différents peuvent entraîner des vitesses de dégouttage différentes du condensé. Afin d'éviter l'apparition de taux d'erreurs plus élevés du niveau de liquide résiduel, d'avoir à enlever prématurément le récipient qui contient le solvant ou bien d'avoir à ajouter un volume supplémentaire de solvant d'extraction, on procède à une vidange quantifiée de la chambre collectrice (13) de l'unité de déverse, qui peut être remplie avec un volume prédéterminé et constant. Le remplissage de ladite chambre (13) avec le condensé produit et la vidange de celle-ci sont effectués plusieurs fois de suite. La vidange pouvant s'effectuer rapidement par apport de fluide sous pression ou par aspiration, on évacue toujours des volumes quantifiés connus, en un temps prédéterminé, de sorte que les volumes résiduels obtenus peuvent être prédéterminés avec précision. L'unité d'extraction convient particulièrement à l'utilisation dans un appareil en ligne pour manipuler des solvants d'extraction explosifs, par exemple pour déterminer la teneur en graisses d'un échantillon.
PCT/DE1994/000039 1993-01-20 1994-01-17 Procede d'extraction par solvant et unite d'extraction a cet effet, ainsi qu'appareil en ligne realise avec de telles unites d'extraction, notamment avec recuperation du solvant Ceased WO1994016791A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4301343.0 1993-01-20
DE4301343A DE4301343C2 (de) 1993-01-20 1993-01-20 Verfahren und Vorrichtung zur Lösungsmittel-Extraktion

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WO1994016791A1 true WO1994016791A1 (fr) 1994-08-04

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997000109A1 (fr) * 1995-06-16 1997-01-03 Tecator Ab Appareil d'extraction par solvants
US20150224422A1 (en) * 2014-02-11 2015-08-13 Edwin Pajarillo DABAO Oil extractor
CN106006598A (zh) * 2016-05-11 2016-10-12 深圳市通产丽星股份有限公司 一种内嵌金属富勒烯纯化装置及纯化方法
CN106706464A (zh) * 2015-11-13 2017-05-24 上海纤检仪器有限公司 一种乳脂肪测定仪
CN115569402A (zh) * 2022-09-19 2023-01-06 章燕 一种自动添加萃取剂的植物提取工艺

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3013228B1 (fr) * 2013-11-20 2016-06-10 Elodie Caron Appareil d'extraction d'un hydrolat

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DE827728C (de) * 1950-10-22 1952-01-14 Richard Stihler Extraktionsapparat
WO1980001881A1 (fr) * 1979-03-13 1980-09-18 Tecator Instr Ab Procede et appareillage pour la recuperation d'un solvant a partir d'une solution, en particulier d'un extrait, ainsi que pour l'emmagasinage du solvant recupere
DE3422430A1 (de) * 1984-06-16 1985-12-19 Jörg 6708 Neuhofen Redeker Laboratoriumsgeraet zur mischdampfextraktion
DE3710385A1 (de) * 1987-03-28 1987-10-15 Gerhardt Fabrik Und Lager Chem Automatisch arbeitender schnellextraktionsapparat mit loesungsmittelrueckgewinnung

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Publication number Priority date Publication date Assignee Title
DE844363C (de) * 1949-08-31 1952-09-29 Heinrich Dr-Ing Scholler Verfahren und Vorrichtung zur Extraktion und zur Durchfuehrung von Extraktionsanalysen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE827728C (de) * 1950-10-22 1952-01-14 Richard Stihler Extraktionsapparat
WO1980001881A1 (fr) * 1979-03-13 1980-09-18 Tecator Instr Ab Procede et appareillage pour la recuperation d'un solvant a partir d'une solution, en particulier d'un extrait, ainsi que pour l'emmagasinage du solvant recupere
DE3422430A1 (de) * 1984-06-16 1985-12-19 Jörg 6708 Neuhofen Redeker Laboratoriumsgeraet zur mischdampfextraktion
DE3710385A1 (de) * 1987-03-28 1987-10-15 Gerhardt Fabrik Und Lager Chem Automatisch arbeitender schnellextraktionsapparat mit loesungsmittelrueckgewinnung

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997000109A1 (fr) * 1995-06-16 1997-01-03 Tecator Ab Appareil d'extraction par solvants
US5961787A (en) * 1995-06-16 1999-10-05 Foss Tecator Ab Solvent extraction apparatus
US20150224422A1 (en) * 2014-02-11 2015-08-13 Edwin Pajarillo DABAO Oil extractor
US9592457B2 (en) * 2014-02-11 2017-03-14 Edwin Pajarillo DABAO Oil extractor
CN106706464A (zh) * 2015-11-13 2017-05-24 上海纤检仪器有限公司 一种乳脂肪测定仪
CN106006598A (zh) * 2016-05-11 2016-10-12 深圳市通产丽星股份有限公司 一种内嵌金属富勒烯纯化装置及纯化方法
CN115569402A (zh) * 2022-09-19 2023-01-06 章燕 一种自动添加萃取剂的植物提取工艺

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DE4301343A1 (de) 1994-07-21

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