WO2012176391A1 - 液体混合方法及び装置 - Google Patents
液体混合方法及び装置 Download PDFInfo
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- WO2012176391A1 WO2012176391A1 PCT/JP2012/003721 JP2012003721W WO2012176391A1 WO 2012176391 A1 WO2012176391 A1 WO 2012176391A1 JP 2012003721 W JP2012003721 W JP 2012003721W WO 2012176391 A1 WO2012176391 A1 WO 2012176391A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/40—Mixing liquids with liquids; Emulsifying
- B01F23/45—Mixing liquids with liquids; Emulsifying using flow mixing
- B01F23/454—Mixing liquids with liquids; Emulsifying using flow mixing by injecting a mixture of liquid and gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/433—Mixing tubes wherein the shape of the tube influences the mixing, e.g. mixing tubes with varying cross-section or provided with inwardly extending profiles
- B01F25/4331—Mixers with bended, curved, coiled, wounded mixing tubes or comprising elements for bending the flow
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/40—Mixing liquids with liquids; Emulsifying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/30—Micromixers
- B01F33/302—Micromixers the materials to be mixed flowing in the form of droplets
- B01F33/3021—Micromixers the materials to be mixed flowing in the form of droplets the components to be mixed being combined in a single independent droplet, e.g. these droplets being divided by a non-miscible fluid or consisting of independent droplets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0093—Microreactors, e.g. miniaturised or microfabricated reactors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B1/00—Devices without movable or flexible elements, e.g. microcapillary devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00781—Aspects relating to microreactors
- B01J2219/00783—Laminate assemblies, i.e. the reactor comprising a stack of plates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00781—Aspects relating to microreactors
- B01J2219/00889—Mixing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00781—Aspects relating to microreactors
- B01J2219/00891—Feeding or evacuation
- B01J2219/00898—Macro-to-Micro (M2M)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00781—Aspects relating to microreactors
- B01J2219/00891—Feeding or evacuation
- B01J2219/00903—Segmented flow
Definitions
- the present invention relates to a method and apparatus for mixing mutually soluble liquids in a fine channel.
- microchannel reactor As a method for producing a desired reaction product by bringing liquids (reactants) that are mutually soluble into contact with each other and mixing them, a method using a flow channel forming body called a so-called microchannel reactor is known.
- the microchannel reactor includes a substrate having a groove formed on the surface, and a fine flow path is configured by the groove.
- Patent Document 2 discloses forming a plurality of convex portions for promoting mixing in the flow path.
- Patent Document 3 discloses that an electrode pair is provided in the middle of the mixing channel and an AC voltage is applied thereto.
- forming a plurality of fine recesses in the flow path as described in Patent Document 2 leads to complication of the flow path shape, and increases the number of steps for creating and maintaining (particularly cleaning) the flow path.
- the arrangement of electrodes as described in Patent Document 3 leads to a complicated structure of the microchannel reactor and a significant increase in cost.
- An object of the present invention is a liquid mixing method and apparatus using a flow path forming body for forming a mixing flow path, which is a significant increase in the shape of the mixing flow path and the promotion of mixing.
- An object of the present invention is to provide a device that can promote the mixing without requiring facilities.
- the present inventors have conceived that a slag flow is forcibly formed in a flow path for mixing liquids to be mixed, and a remarkable mixing promoting effect is thereby achieved. It was confirmed that it was obtained.
- the “slag flow” refers to a flow in which cells made of the liquid to be mixed and cells made of other fluid are alternately arranged in the flow channel length direction in a micro flow channel. It was confirmed that the formation of such a slag flow dramatically promotes the mixing of the liquids to be mixed within the cell containing the liquid to be mixed. This effect is due to the fact that mixing of the liquids to be mixed is performed in each minute cell and that a microcirculation flow effective for promoting the mixing of the liquids to be mixed is formed in each cell. Inferred.
- the present invention has been made from such a viewpoint, and is a method useful for mixing a first liquid and a second liquid, which are liquids to be mixed, that are mutually soluble in a mixing flow path that is a fine flow path.
- the method includes a step of joining the first liquid and the second liquid into the mixing flow channel, and the first and second liquids in a direction intersecting the flow channel with respect to the merged liquid flowing in the flow channel.
- the first liquid and the second liquid that are mutually soluble means a fluid having such a property that the liquids do not separate into layers even when the liquid mixture is left after mixing the liquids. It means that both mixing target liquids are highly hydrophilic, and both mixing target liquids are both highly lipophilic.
- the “insoluble fluid having insolubility with respect to the first liquid and the second liquid” for example, when the first and second liquids have high hydrophilicity, for example, oil or gas with low water solubility ( Nitrogen gas, inert gas, hydrocarbon gas, etc.), and when the first and second liquids have high lipophilicity, for example, water, highly hydrophilic liquid, gas with low solubility in oil Examples thereof include nitrogen gas and inert gas.
- the present invention also provides a liquid mixing apparatus suitable for performing the above mixing.
- the apparatus includes a flow path forming body that forms a mixing flow path for mixing a first liquid and a second liquid that are mutually soluble, and a first liquid supply that supplies the first liquid to the flow path forming body. And a second liquid supply unit that supplies the second liquid to the flow path forming body, and an insoluble fluid that is insoluble to both the first liquid and the second liquid is supplied to the flow path forming body.
- the mixing flow path formed by the flow path forming body includes a first liquid introduction section into which the first liquid supplied from the first liquid supply section is introduced and a second liquid supply from the second liquid supply section.
- a second liquid is introduced and has a terminal end communicating with the terminal end of the first liquid introducing part so that the introduced second liquid and the first liquid introduced into the first liquid introducing part are merged.
- the slag flow is And a insoluble fluid introduction portion having a terminal end which communicates with the mixing unit to form a mixed portion of the downstream side from the position of the introduction of the fluid.
- FIG. 6A is a sectional view taken along line 6A-6A in FIG. 5A, and FIG.
- FIG. 5B is a sectional view taken along line 6B-6B in FIG.
- (b) is sectional drawing which shows the slag flow formed in the said mixing groove. It is a graph which shows the relationship between the flow volume of sodium hydroxide aqueous solution and acetic acid aqueous solution in 1st Example of this invention, and the distance required for these neutralization reaction.
- (A) and (b) are graphs showing the relationship between the nitrogen gas flow rate and the distance required for the neutralization reaction of the aqueous sodium hydroxide solution and aqueous acetic acid solution in the first embodiment of the present invention, and (b) the nitrogen gas flow rate It is a graph which shows the relationship between time required for the said neutralization reaction.
- FIG. 1 and 2 show a liquid mixing apparatus according to this embodiment.
- This device is for mixing a first liquid and a second liquid that are soluble in each other, and a flow path forming body FB that forms a mixing flow path 50 for the mixing, and the flow path forming body.
- a first liquid supply unit 10 for supplying the first liquid; a second liquid supply unit 20 for supplying the second liquid to the flow path forming body FB; and an insoluble fluid in the flow path forming body, ie, the first
- An insoluble fluid supply unit 30 that supplies a fluid that is insoluble in both the liquid and the second liquid, and a recovery container 40 are provided.
- the first liquid supply unit 10 includes a first liquid container 12 that contains the first liquid, a first liquid pipe 14 that connects the inside of the first liquid container 12 and the flow path forming body FB, and A first liquid pump 16 that pumps the first liquid in the first liquid container 12 to the flow path forming body FB through the first liquid pipe 14;
- the second liquid supply unit 20 includes a second liquid container 22 that stores the second liquid, and a second liquid pipe 24 that connects the inside of the second liquid container 22 and the flow path forming body FB.
- a second liquid pump 26 that pumps the second liquid in the second liquid container 22 to the flow path forming body FB through the second liquid pipe 24.
- this apparatus includes a thermostatic chamber 42 shared by the first liquid supply unit 10 and the second liquid supply unit 20.
- the thermostat 42 is for keeping the temperature of the first and second liquids supplied to the flow path forming body FB constant, but may be omitted as appropriate depending on the application.
- a midway portion of each of the pipes 14 and 24 is formed in a spiral shape, and this portion is immersed in warm water accommodated in the thermostat 42.
- the first liquid and the second liquid that are objects of the present invention may be water-soluble or water-insoluble as long as they are soluble in each other.
- both liquids may be water or an aqueous solution, or both liquids may be oil-based.
- the mixing ratio can be set freely.
- the insoluble fluid supply unit 30 includes an insoluble fluid container 32 that contains an insoluble fluid, an insoluble fluid pipe 34 that connects the inside of the insoluble fluid container 32 and the flow path forming body FB, and the insoluble fluid pipe 34 through the insoluble fluid pipe 34. And a flow rate regulator for adjusting the flow rate of the insoluble fluid supplied from the insoluble fluid container 32 to the flow path forming body FB.
- gas is used as the insoluble fluid
- the insoluble fluid container 32 is constituted by a gas cylinder in which the gas is sealed in a compressed state. And the gas which is the said insoluble fluid is pumped by the pressure in this gas cylinder to the said flow-path formation body FB.
- the insoluble fluid used in the present invention is not particularly limited as long as it is insoluble in both the first liquid and the second liquid.
- first and second liquids are water or an aqueous solution
- a water-insoluble gas or liquid can be used.
- the first and second liquids are oil-based, for example, water is used. It is also possible.
- the insoluble fluid supply unit 30 may be provided with an insoluble fluid supply liquid pump similar to the first and second liquid pumps 16 and 26.
- the flow rate adjuster 36 can be omitted depending on the application.
- the mixing flow path 50 formed by the flow path forming body FB includes a first liquid introduction section 51 and a second liquid introduction section 52 into which the first liquid and the second liquid are introduced, respectively. And a mixing portion 54 and an insoluble fluid introduction portion 53 into which the insoluble fluid is introduced.
- the first liquid introduction part 51 has an inlet end connected to the first liquid pipe 14 of the first liquid supply part 10 and a terminal end on the opposite side.
- the second liquid introduction part 52 has an inlet end connected to the second liquid pipe 24 of the second liquid supply part 20 and a terminal end on the opposite side.
- the terminal ends of the first and second liquid introducing portions 51 and 52 are at the joining position Pj so that the first liquid and the second liquid introduced into the liquid introducing portions 51 and 52 are joined at the predetermined joining position Pj. Communicate with each other.
- the mixing unit 54 is for mixing while flowing both fluids merged at the merge position Pj, and has a flow path length necessary for the mixing.
- the mixing portion 54 has a start end connected to the ends of the liquid introduction portions 51 and 52 at the merging position Pj and an outlet end on the opposite side. The outlet end receives the mixed liquid at a predetermined discharge position Pd.
- the recovery container 40 is connected to the recovery container 40 so as to be discharged.
- the insoluble fluid introduction part 53 has an inlet end connected to the insoluble fluid piping 34 of the insoluble fluid supply part 30 and a terminal end opposite to the inlet end.
- the mixed liquid flowing in the mixing portion 54 at the midway position Pm is introduced into the mixing portion 54 so as to be introduced from the direction intersecting the mixing portion 54 (in this embodiment, the thickness direction of the substrate 100). Connected.
- the flow path forming body FB includes a base body on which grooves constituting the mixing flow path 50 are formed, and a lid body mounted on the base body so as to cover the grooves.
- the base body is constituted by the substrate 100 shown in FIGS. 3 to 6, and the lid body is the first lid plate 110 and the second lid plate shown in FIGS. 120.
- the substrate 100 has a flat plate shape having a rectangular first side surface 101 and a second side surface 102 on the back side, and the first cover plate 110 and the second cover plate 120 are respectively the substrate.
- the substrate 100 is laminated together with the substrate 100 so as to be superimposed on the first side surface 101 and the second side surface 102.
- the grooves are formed on both side surfaces 101 and 102 of the substrate 100, whereby a mixing apparatus capable of efficient mixing processing with a compact structure is constructed.
- the substrate 100 includes a first liquid inlet port 131, a second liquid inlet port 132, an insoluble fluid inlet port 133, an outlet port 134, a plurality of first liquid grooves 141, and a plurality of holes.
- the second liquid groove 142, a plurality of insoluble fluid grooves 143, a plurality of mixing grooves 144, a merging hole 150, and an insoluble fluid introduction hole 153 are provided. These are formed by etching the substrate 100.
- Each of the ports 131 to 134 is configured by a through hole that penetrates the substrate 100 in the thickness direction, and the first cover plate 110 and the second cover plate 120 also have a plurality of similar through holes in the ports 131 to 134. Each has a corresponding position. However, the lowermost second lid plate 120 does not have a through hole for sealing the fluid.
- the through holes are formed in the uppermost first lid plate 110, and the first liquid pipe 14, the second liquid pipe 24, the insoluble fluid pipe 34, and the recovery container 40 are connected to the through holes, respectively. Is done.
- the first liquid grooves 141 are formed in the first side surface 101 to constitute the first liquid introduction part 51.
- the first liquid grooves 141 according to this embodiment extend in a straight line from the first liquid inlet port 131 to the joining position Pj along the long side of the substrate 100 in a state parallel to each other.
- Each first liquid groove 141 has a depth smaller than 1 ⁇ 2 of the thickness of the substrate 100.
- the number of the second liquid grooves 142 is the same as the number of the first liquid grooves 141, and the second liquid grooves 142 are formed on the second side surface 102 so as to be parallel to each other to constitute the second liquid introduction part 52.
- Each of the second liquid grooves 142 changes from the second liquid inlet port 132 toward the first liquid groove 141 in a direction perpendicular to the first liquid groove 141, and the second liquid groove 142 is turned 90 ° from this portion to the downstream side and corresponds to the second liquid groove 142. And a portion extending along the first liquid groove 141 to the joining position Pj on the back side of the one liquid groove 141.
- Each of the second liquid grooves 142 has a depth equivalent to the depth of each of the first liquid grooves 141, that is, a depth smaller than 1 ⁇ 2 of the thickness of the substrate 100.
- the merging hole 150 penetrates the substrate 100 in the thickness direction at the merging position Pj, thereby communicating the end of the first liquid groove 141 and the end of the second liquid groove 142. That is, the first liquid flowing through the first liquid groove 141 and the second liquid flowing through the second liquid groove 142 can be merged.
- the number of the mixing grooves 144 is the same as the number of the first liquid grooves 141 and is formed on the first side surface 101 so as to be parallel to each other to constitute the mixing portion 54.
- Each mixing groove 144 has a shape that leads to the end of each first liquid groove 141 at the joining position Pj and reaches the outlet port 134 while meandering from the joining position Pj.
- Each mixing groove 144 has a depth larger than the depth of both the liquid grooves 141 and 142 (in this embodiment, a depth larger than 1 ⁇ 2 of the thickness of the substrate 100). And communicated with both liquid grooves 141 and 142. Therefore, the first liquid and the second liquid that have joined together in the joining hole 150 can flow into the mixing groove 144.
- the insoluble fluid grooves 143 are the same in number as the mixing grooves 144 and are formed in the second side surface 102 so as to be parallel to each other to constitute the insoluble fluid introduction portion 53.
- Each insoluble fluid groove 143 includes a portion that approaches the mixing groove 144 from the insoluble solution inlet port 133 from a direction orthogonal thereto, a 90 ° turn from this portion to the downstream side, and the back side of the corresponding mixing groove 144 And an L-shape having a portion extending along the mixing groove 144 to the middle position Pm.
- Each insoluble fluid groove 143 has a depth smaller than 1 ⁇ 2 of the thickness of the substrate 100.
- the insoluble fluid introduction hole 153 penetrates the substrate 100 in the thickness direction at the midway position Pm, thereby communicating the midway portion of the mixing groove 144 and the end of the insoluble fluid groove 143. That is, it is possible to introduce the insoluble fluid flowing through the insoluble solution groove 143 to the liquid flowing through the mixing groove 144 (the liquid after the first liquid and the second liquid merge).
- the first cover plate 110 is overlapped with and bonded to the substrate 100 so as to cover the first side surface 101, thereby forming the first liquid groove 141 and the mixing groove 144 formed on the first side surface 101.
- the first liquid introduction part 51 and the mixing part 54 are respectively constructed in a sealed manner.
- the second cover plate 120 is overlapped with and bonded to the substrate 100 so as to cover the second side surface 102, and thereby the second liquid groove 142 formed on the second side surface 102 and the insoluble layer are insoluble.
- the fluid groove 143 is sealed, thereby constructing the second liquid introduction part 52 and the insoluble fluid introduction part 53, respectively.
- the substrate 100 may be alternately stacked with a cover plate over a plurality of stages. This laminated body can mix and process more liquid.
- the cover plate interposed between the substrates 100 covers both the first side surface 101 of the one substrate 100 and the second side surface 102 of the other substrate 100, which contributes to further downsizing of the flow path forming body. Can do.
- the first liquid and the second liquid supplied from the first liquid supply part 10 and the second liquid supply part 20 to the flow path forming body 100 are respectively the first liquid introduction part 51 (first of the flow path forming body 100). 1 liquid groove 141) and the second liquid introduction part 52 (second liquid groove 142), and merge through the merge hole 150 at the merge position Pj (FIG. 5A). Both liquids are mixed while flowing through the mixing section 54 (mixing groove 144) on the downstream side.
- an insoluble fluid is supplied from the insoluble fluid supply unit 30 to the flow path forming body 100, and the insoluble fluid is insoluble in the flow path forming body 100.
- the fluid is introduced into the mixing portion 54 through the fluid introduction portion 53 (insoluble fluid groove 143 and insoluble fluid introduction hole 153) at an intermediate position Pm.
- the insoluble fluid is separated at intervals by dividing the liquid flowing through the mixing portion 54 (the liquid after the first liquid and the second liquid are merged; hereinafter referred to as “the post-merging liquid”).
- the supply flow rates of the first liquid, the second liquid, and the insoluble fluid are set so as to form a slag flow on the downstream side of Pm.
- the “slag flow” referred to here is a flow in which the mixing target cells 60 made of the post-merging liquid and the insoluble fluid cells 63 made of the insoluble fluid are alternately arranged as shown in FIGS. 7 (a) and 7 (b).
- the formation of this slag flow dramatically promotes the mixing of the first liquid and the second liquid flowing in the mixing portion 54 as will be described later in the section of the embodiment. This effect is due to the fact that after the merging, the liquid is divided into the mixing target cells 60 having a very small volume and mixed therein, and a circulation flow effective for mixing is formed in each mixing target cell 60. Inferred.
- the volume ratio between the mixing target cell 60 and the insoluble fluid cell 63 in the slag flow can be freely set by adjusting the introduction flow rate of the insoluble fluid. Specifically, as will be described later in the section of the embodiment, the volume (size) of each mixing target cell 60 can be reduced as the introduction flow rate of the insoluble fluid is increased. 7A and 7B, as the volume of the mixing target cell 60 is reduced, the degree to which the circulating flow in the cell 60 contributes to the mixing promotion increases. On the other hand, if the volume share of the insoluble fluid cell increases, the processing efficiency of the liquid to be mixed decreases, leading to an increase in pressure loss and an unnecessary increase in consumption of insoluble fluid. Therefore, the volume ratio is preferably set from such a viewpoint. In general, it is preferably set within a range of 1/5 or more and 4 or less.
- the mixing channel according to the present invention is not limited to the one constituted by the grooves formed in the base as described above.
- the mixing channel can be formed by a tube having a minute inner diameter.
- Examples and comparative examples according to the present invention will be described.
- a sodium hydroxide (NaOH) aqueous solution is used as the first liquid
- an acetic acid aqueous solution is used as the second liquid
- the apparatus shown in FIGS. 1 to 6 is used to neutralize both. Both liquids were mixed, and the distance (distance in the mixing part 54) and time required for completion of the neutralization reaction were measured.
- Example 2 Insoluble fluid Nitrogen gas (Examples 1, 3, 4) or dodecane (Example 2) is used as the insoluble fluid. Nitrogen gas is supplied to the flow path forming body FB by the internal pressure (initial pressure of about 0.3 MPaG) of the gas cylinder (insoluble fluid container 32) into which the nitrogen gas is pressed. Dodecane is supplied to the flow path forming body FB by a dedicated pump. In either case, the supply flow rate is adjusted by the flow rate adjuster 36.
- FIG. 8 shows the supply flow rate of the first liquid (NaOH aqueous solution) and the second liquid (acetic acid aqueous solution) in the case where no insoluble fluid is supplied (supply flow per channel; the same applies to other figures) and the neutralization reaction.
- the required distance (the distance that the fluid needs to flow through the mixing section 54 until the neutralization of both liquids is completed) is shown.
- the neutralization reaction required distance simply increases as the supply flow rates of both liquids increase.
- Example 1 The mixing method according to the present invention was carried out using 1N sodium hydroxide aqueous solution as the first liquid, 1N acetic acid aqueous solution as the second liquid, and nitrogen gas as the insoluble fluid. Specifically, when both the flow rates of the two aqueous solutions are adjusted to 0.5 ml / min, the nitrogen gas supply flow rate is appropriately changed for each of the cases where the flow rate is adjusted to 1 ml / min. The relationship between the neutralization reaction required distance and the neutralization reaction required time was investigated. The results are shown in FIGS. 9 (a) and 9 (b).
- Example 2 The mixing method according to the present invention was carried out using a 1N aqueous sodium hydroxide solution as the first liquid, a 1N aqueous acetic acid solution as the second liquid, and dodecane, which is a petroleum-based liquid, as the insoluble fluid. Specifically, when both the flow rates of the aqueous solutions are adjusted to 0.5 ml / min, the dodecane supply flow rate is appropriately changed and repeated for each of the cases where the aqueous solution is adjusted to 1 ml / min. The relationship with the sum required distance was investigated. The result is shown in FIG.
- Examples 3 and 4 In exactly the same manner as in Example 1, the mixing method according to the present invention was carried out using 1N sodium hydroxide aqueous solution as the first liquid, 1N acetic acid aqueous solution as the second liquid, and nitrogen gas as the insoluble fluid. However, by adding ethylene glycol having a viscosity of 23.5 cP (@ 20 ° C.) to the aqueous sodium hydroxide solution (Example 3) or adding ethylene glycol to both aqueous solutions (Example 4), the viscosity of the added aqueous solution is increased. Was increased from 1.0 cP (@ 20 ° C.) to about 12.0 cP. The result is shown in FIG.
- the graph of FIG. 11 also closely approximates the graph of FIG. 9A according to the first embodiment. This indicates that the mixing promotion effect by the mixing method according to the present invention can be stably obtained even if the viscosity of the first and second liquids slightly increases or decreases (in a range that does not affect the formation of the slag flow). Yes. Moreover, the fact that the above-mentioned mixing promotion effect is obtained regardless of the mixing of ethylene glycol, which is an organic solvent, suggests that the present invention can exert the effect not only in the mixing of aqueous solutions but also in the mixing of oil-based liquids. To do.
- the purpose of mixing according to the present invention is not limited to the neutralization reaction.
- the present invention can be applied to mixing for a reaction (reductive aldol reaction) for producing an alcohol from an aldehyde compound.
- a reaction reductive aldol reaction
- the product in producing an alcohol by reaction with the third reactant R 3 —CO—R 4
- the present invention can be applied to the mixing of the first and second reactants.
- the first and second reactants are the first and second liquids, respectively, and nitrogen gas is introduced as an insoluble fluid after the merging, thereby forming a slag flow in the same manner as above to mix the two liquids. Can be promoted.
- the present invention provides a method useful for mixing the first liquid and the second liquid, which are the liquids to be mixed, that are soluble in each other in the mixing flow path that is a fine flow path.
- the first liquid and the second liquid are merged in the mixing flow path, and the first liquid from a direction intersecting the flow path with respect to the merged liquid flowing in the flow path.
- a mixing target cell composed of the combined liquid and an insoluble fluid cell composed of the insoluble fluid Are formed in the flow path on the downstream side of the supply position of the insoluble fluid, whereby the first liquid and the second liquid in each mixing target cell are formed in the flow path on the downstream side. Mixing with a liquid.
- the first liquid and the first liquid are formed by forming a slag flow in which cells to be mixed composed of the first and second liquids merged in the mixing flow path and insoluble fluid cells composed of the insoluble fluid are alternately arranged. Since the mixing with the two liquids is promoted, the mixing efficiency can be increased without requiring the complexity of the flow path shape and the addition of the voltage application unit as in the conventional case.
- the first liquid and the second liquid that are mutually soluble means a fluid having such a property that the liquids do not separate into layers even when the liquid mixture is left after mixing the liquids. It means that both mixing target liquids are highly hydrophilic, and both mixing target liquids are both highly lipophilic.
- the “insoluble fluid having insolubility with respect to the first liquid and the second liquid” for example, when the first and second liquids have high hydrophilicity, for example, oil or gas with low water solubility ( Nitrogen gas, inert gas, hydrocarbon gas, etc.), and when the first and second liquids have high lipophilicity, for example, water, highly hydrophilic liquid, gas with low solubility in oil Examples thereof include nitrogen gas and inert gas.
- the method according to the present invention further includes the step of separating the insoluble fluid from the liquid to be mixed after the completion of the mixing of the first and second liquids, thereby obtaining the originally desired mixed fluid. It is. In this case, by using a gas as the insoluble fluid, separation of the insoluble fluid and the liquid to be mixed is significantly facilitated.
- the liquid to be mixed according to the present invention that is, the first and second liquids to be mixed, for example, those having water solubility are suitable.
- a water-insoluble fluid may be used as the insoluble fluid, and nitrogen gas or inert gas is particularly suitable.
- the volume ratio between the mixing target cell and the insoluble fluid cell in the slag flow can be freely set by adjusting the flow rate of the insoluble fluid introduced.
- the volume ratio is preferably 1 ⁇ 2 or more and 2 or less.
- the fine channel for example, a channel constituted by a groove formed in the substrate can be used.
- the present invention also provides a liquid mixing apparatus suitable for performing the above mixing.
- the apparatus includes a flow path forming body that forms a mixing flow path for mixing a first liquid and a second liquid that are mutually soluble, and a first liquid supply that supplies the first liquid to the flow path forming body. And a second liquid supply unit that supplies the second liquid to the flow path forming body, and an insoluble fluid that is insoluble to both the first liquid and the second liquid is supplied to the flow path forming body.
- the mixing flow path formed by the flow path forming body includes a first liquid introduction section into which the first liquid supplied from the first liquid supply section is introduced and a second liquid supply from the second liquid supply section.
- a second liquid is introduced and has a terminal end communicating with the terminal end of the first liquid introducing part so that the introduced second liquid and the first liquid introduced into the first liquid introducing part are merged.
- the slag flow is And a insoluble fluid introduction portion having a terminal end which communicates with the mixing unit to form a mixed portion of the downstream side from the position of the introduction of the fluid.
- the substrate comprises a substrate having a first side surface and a second side surface behind the first side surface, and grooves are formed on both side surfaces of the substrate, so that the mixing channel is suitable for the liquid mixing method with a compact structure.
- the substrate is formed on the first side surface so as to be connected to the first liquid groove formed on the first side surface and constituting the first liquid introducing portion, and to the end of the first liquid groove.
- a second liquid groove having a shape, and a groove formed on the second side surface and constituting the insoluble fluid introduction portion, the end of the groove being located behind the middle portion of the mixing portion. And a junction that allows the first liquid and the second liquid to merge by penetrating the substrate in the thickness direction so as to communicate the end of the first liquid groove and the end of the second liquid groove.
- the communication hole, the middle part of the mixing groove and the end of the non-solution body groove communicate with each other.
- the first liquid and the second liquid are merged, the insoluble fluid is introduced into the liquid after the merge, and the slag flow formed by the introduction is used. It is possible to efficiently promote the mixing of the two liquids with a compact structure, and the promotion of the mixing makes it possible to reduce the required length of the mixing groove.
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Abstract
Description
(1)第1液体及び第2液体について
・第1液体と第2液体を流量比が1:1の割合で流路形成体FBに同時供給する。
・恒温槽42は使用せず、両液体は常温(20°C程度)のまま供給される。
・中和反応の完了は、第1液体(NaOH水溶液)に混入させたチモールブルーの変色(青色→黄色)により確認される。
・粘度調整のため、第1液体または第1及び第2液体に適量のエチレングリコールが付与される(実施例3及び4)
不溶流体には窒素ガス(実施例1,3,4)またはドデカン(実施例2)を使用。窒素ガスは、これが圧入されたガスボンベ(不溶流体容器32)の内圧(初期圧0.3MPaG程度)によって流路形成体FBに供給される。ドデカンは専用ポンプにより前記流路形成体FBに供給される。いずれの場合も流量調整器36によって供給流量が調整される。
・基板100の材質及び板厚:SUS316L製、厚み0.8mm
・各溝141~144の本数:15本
・液体溝141,142及び不溶流体溝143の深さ(半円断面の半径):0.2mm
・混合溝144の全長及び深さ(半円断面の半径):3m×0.45mm
・合流用孔150及び不溶流体導入孔153の孔径:0.5mm
図8は、不溶流体を供給しない場合の第1液体(NaOH水溶液)及び第2液体(酢酸水溶液)の供給流量(1流路あたりの供給流量。他の図においても同じ。)と中和反応必要距離(両液体の中和が完了するまでに当該流体が混合部54を流れる必要がある距離)とを示したものである。この図に示されるように、両液体の供給流量が増えると中和反応必要距離も単純に増大する。
第1液体に1N水酸化ナトリウム水溶液、第2液体に1N酢酸水溶液、不溶流体に窒素ガスを用いて本発明に係る混合方法を実施した。具体的には、前記両水溶液の流量をともに0.5ml/minに調節した場合、1ml/minに調節した場合のそれぞれについて窒素ガス供給流量を適宜変更して繰り返し実施し、当該窒素ガス供給流量と中和反応必要距離及び中和反応必要時間との関係を調べた。その結果を図9(a)(b)に示す。
第1液体に1N水酸化ナトリウム水溶液、第2液体に1N酢酸水溶液、不溶流体に石油系液体であるドデカンを用いて本発明に係る混合方法を実施した。具体的には、前記両水溶液の流量をともに0.5ml/minに調節した場合、1ml/minに調節した場合のそれぞれについてドデカン供給流量を適宜変更して繰り返し実施し、当該ドデカン供給流量と中和反応必要距離との関係を調べた。その結果を図10に示す。
実施例1と全く同様に、第1液体に1N水酸化ナトリウム水溶液、第2液体に1N酢酸水溶液、不溶流体に窒素ガスを用いて本発明に係る混合方法を実施した。ただし、水酸化ナトリウム水溶液に粘度23.5cP(@20℃)のエチレングリコールを添加し(実施例3)または両水溶液にエチレングリコールを添加する(実施例4)ことにより、その添加した水溶液の粘度を1.0cP(@20℃)から約12.0cPまで上昇させて実験を行った。その結果を図11に示す。
Claims (8)
- 微細流路でなる混合流路内で互いに可溶性を有する混合対象液体である第1液体及び第2液体を混合させるための方法であって、
前記混合流路内に前記第1液体及び前記第2液体を合流させる工程と、
前記流路内を流れる合流後の液体に対して前記両混合対象液体に対して不溶性を有する不溶流体を供給して当該合流後の液体を間隔をおいて分断することにより当該合流後の液体からなる混合対象セルと当該不溶流体からなる不溶流体セルとが交互に並ぶスラグ流を前記不溶流体の供給位置よりも下流側の流路内に形成し、これにより、前記下流側の流路内において各混合対象セル内の前記第1混合対象液体と前記第2混合対象液体とを混合させる工程と、を含む、液体混合方法。 - 請求項1記載の液体混合方法において、前記不溶流体が気体である、液体混合方法。
- 請求項2記載の液体混合方法において、前記第1及び第2液体の混合完了後にこれら第1液体及び第2液体から前記不溶流体を分離する工程をさらに含む、液体混合方法。
- 請求項1~3のいずれかに記載の液体混合方法において、前記スラグ流における混合対象セルと不溶流体セルとの体積比が1/5以上4以下となるように前記不溶流体の導入流量が設定される、液体混合方法。
- 請求項1に記載の液体混合方法において、前記微細流路が基体に形成された溝により構成されたものである、液体混合方法。
- 互いに可溶性を有する第1液体及び第2液体を混合させるための装置であって、
前記第1液体及び前記第2液体を混合させるための混合用流路を形成する流路形成体と、
この流路形成体に前記第1液体を供給する第1液体供給部と、
前記流路形成体に前記第2液体を供給する第2液体供給部と、
前記流路形成体に前記第1液体及び前記第2液体の双方に対して不溶性を有する不溶流体を供給する不溶流体供給部と、を備え、
前記流路形成体が形成する混合用流路は、前記第1液体供給部から供給される第1液体が導入される第1液体導入部と、前記第2液体供給部から供給される第2液体が導入されるとともに、この導入された第2液体と前記第1液体導入部に導入された第1液体とを合流させるように前記第1液体導入部の終端と連通する終端をもつ第2液体導入部と、両液体導入部の終端につながり、当該終端で合流した後の液体を流しながら混合するための混合部と、前記不溶流体供給部から供給される不溶流体を前記混合部の途中位置においてその混合部内を流れる前記合流後の液体に対してその混合部と交差する方向から導入することにより当該合流後の液体からなる混合対象セルと当該不溶流体からなる不溶流体セルとが交互に並ぶスラグ流を前記不溶流体の導入位置よりも下流側の混合部内に形成するように当該混合部に連通する終端をもつ不溶流体導入部とを有する、液体混合装置。 - 請求項6記載の液体混合装置において、前記流路形成体は、前記混合用流路を構成する溝が形成された基体と、その溝を覆うように当該基体に装着される蓋体とを有する、液体混合装置。
- 請求項7記載の液体混合装置において、前記基体が第1側面及びその裏側の第2側面を有する基板からなり、この基板には、その第1側面に形成されて前記第1液体導入部を構成する第1液体溝と、この第1液体溝の終端につながるように前記第1側面に形成されて前記混合部を構成する混合溝と、前記第2側面に形成されて前記第2液体導入部を構成する溝であってその溝の終端が前記第1液体溝の終端の裏側に位置する形状をもつ第2液体溝と、前記第2側面に形成されて前記不溶流体導入部を構成する溝であってその溝の終端が前記混合部の途中部位の裏側に位置する形状をもつ不溶流体溝と、前記第1液体溝の終端と前記第2液体溝の終端とを連通するように前記基板をその厚み方向に貫通して前記第1液体と前記第2液体との合流を可能にする合流用孔と、前記混合溝の途中部位と前記不溶液体溝の終端とを連通するように前記基板をその厚み方向に貫通して前記混合溝内を流れる液体に対しての前記不溶流体の導入を可能にする不溶流体導入孔と、が設けられる、液体混合装置。
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