US20090294344A1 - Fluid mixer assembly - Google Patents
Fluid mixer assembly Download PDFInfo
- Publication number
- US20090294344A1 US20090294344A1 US11/631,221 US63122105A US2009294344A1 US 20090294344 A1 US20090294344 A1 US 20090294344A1 US 63122105 A US63122105 A US 63122105A US 2009294344 A1 US2009294344 A1 US 2009294344A1
- Authority
- US
- United States
- Prior art keywords
- fluid
- housing
- mixing chamber
- mixer
- end portion
- 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.)
- Abandoned
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D15/00—Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
- B01D15/08—Selective adsorption, e.g. chromatography
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D15/00—Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
- B01D15/08—Selective adsorption, e.g. chromatography
- B01D15/10—Selective adsorption, e.g. chromatography characterised by constructional or operational features
- B01D15/16—Selective adsorption, e.g. chromatography characterised by constructional or operational features relating to the conditioning of the fluid carrier
- B01D15/166—Fluid composition conditioning, e.g. gradient
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
- B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
- B01F35/7176—Feed mechanisms characterised by the means for feeding the components to the mixer using pumps
-
- 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
-
- 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
- B01F25/105—Mixing heads, i.e. compact mixing units or modules, using mixing valves for feeding and mixing at least two components
-
- 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
- B01F25/20—Jet mixers, i.e. mixers using high-speed fluid streams
- B01F25/25—Mixing by jets impinging against collision plates
-
- 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
-
- 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
- B01F25/45—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads
- B01F25/452—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces
- B01F25/4524—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces the components being pressed through foam-like inserts or through a bed of loose bodies, e.g. balls
-
- 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
- B01F25/45—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads
- B01F25/452—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces
- B01F25/4524—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces the components being pressed through foam-like inserts or through a bed of loose bodies, e.g. balls
- B01F25/45241—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces the components being pressed through foam-like inserts or through a bed of loose bodies, e.g. balls through a bed of balls
-
- 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
- B01F33/25—Mixers with loose mixing elements, e.g. loose balls in a receptacle
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/06—Preparation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/26—Conditioning of the fluid carrier; Flow patterns
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/26—Conditioning of the fluid carrier; Flow patterns
- G01N30/28—Control of physical parameters of the fluid carrier
- G01N30/34—Control of physical parameters of the fluid carrier of fluid composition, e.g. gradient
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/26—Conditioning of the fluid carrier; Flow patterns
- G01N30/28—Control of physical parameters of the fluid carrier
- G01N30/34—Control of physical parameters of the fluid carrier of fluid composition, e.g. gradient
- G01N2030/347—Control of physical parameters of the fluid carrier of fluid composition, e.g. gradient mixers
Definitions
- the subject invention relates to an assembly for mixing fluids (i.e., gases or liquids), and more particularly to an assembly that accurately mixes two or more high-pressure fluid sources and is adapted for use in applications, such as for example, chromatography.
- fluids i.e., gases or liquids
- the need to accurately mix or combine two or more fluids is a necessary and important step in the production line.
- the accuracy of the solvent mixture i.e., mixture of two or more solvents
- the precision of the subsequent chromatographic analysis affects the precision and accuracy of the subsequent chromatographic analysis.
- FIG. 1 illustrates a typical chromatographic process.
- chromatography e.g. paper and thin layer
- most modern applications include a mobile phase and a stationary phase and the separation of the fluid mixture takes place in a column.
- the column is usually a glass or metal tube of sufficient strength to withstand the pressures that may be applied across it.
- the column can be for example, a packed bed or open tubular column.
- the column contains the stationary phase of the process, i.e., the material for which the components to be separated have varying affinities.
- the mobile phase of the chromatographic process is comprised of a solvent mixture into which the sample to be analyzed is injected. The mobile phase enters the column and the sample is absorbed onto the stationary phase. The solvent mixture is not absorbed on the stationary phase, but passes through the column.
- the materials that comprise the mobile and the stationary phase vary depending on the general type of chromatographic process being performed, i.e., gas or liquid chromatography.
- the mobile phase in gas chromatography is generally an inert gas.
- the stationary phase is generally an adsorbent or liquid distributed or the surface of a porous, inert support.
- the mobile phase in liquid chromatography is a liquid of low viscosity that flows through the stationary bed. This may be comprised of an immiscible liquid coated onto a porous support, a thin film of liquid phase bonded to the surface of a sorbent, or a sorbent of controlled pore size.
- a first pump is used to draw a first solvent from a tank and supply it at a desired flow velocity and pressure to a T-shaped piping connector.
- a second pump is used to draw a second solvent from a second tank and supply it at a desired flow velocity and pressure to the T-shaped piping connector.
- the solvents are blended to achieve a solvent mixture having desired properties.
- the flow velocity of each solvent can be adjusted over time so as to vary the composition of the solvent mixture over time. A variation in the solvent mixture over time is called a solvent or compositional gradient.
- a third pump is used to supply the sample or feed to a second T-shaped piping connection where it is injected into the solvent mixture and blended therewith, forming the mobile phase.
- the mobile phase runs through the column typically by action of the first and second pumps whereby the sample is absorbed onto the stationary phase.
- the sample flows through the column, its different components will adsorb to the stationary phase to varying degrees. Those with strong attraction to the support move more slowly than those with weak attraction and this is how the components are separated.
- the different components After the sample is flushed or displaced from the stationary phase, the different components will elute from the column at different times. The components with the least affinity for the stationary phase will elute first, while those with the greatest affinity for the stationary phase will elute last.
- a detector analyses the emerging stream by measuring a property, which is related to concentration and characteristic of chemical composition. For example, the refractive index or ultra-violet absorbance is measured.
- the invention provides a device or mixer assembly that accurately mixes two or more streams of fluids, even at high pressure.
- the mixer assembly includes a housing that has opposed upstream and downstream end portions.
- the upstream end portion of the housing has a fluid receiving section and the downstream end portion includes a fluid discharge section with a fluid outlet formed therein.
- the housing of the mixer assembly defines a central bore which extends between the fluid receiving section and fluid discharge section.
- An inlet fitting is engaged with the upstream end portion of the housing and has first and second fluid inlet ports formed therein that extend from the fitting exterior to the fluid receiving section of the housing.
- a mixer cartridge assembly is disposed within the central bore of the housing and is positioned between the inlet fitting and the downstream end portion of the housing.
- the mixer cartridge assembly includes a body portion, a plurality of spheres disposed within a central mixing chamber formed in the body portion, and mechanism for retaining the spheres in the mixing chamber.
- the central mixing chamber formed in the body portion of the mixer cartridge communicates with the fluid receiving section of the housing and the discharge port extends from the mixing chamber to the fluid outlet formed in the housing.
- the plurality of spheres disposed within the mixing chamber facilitates the mixing of fluids received therein.
- the mechanism for retaining the spheres within the mixing chamber includes a filter ring associated with the upstream end of the mixing chamber and a filter disc associated with a downstream end of the mixing chamber.
- the mixer assembly can further include a filter element that is axially disposed between the inlet fitting and the mixer cartridge assembly.
- the filter element removes unwanted particles from the fluid provided from each of the first and second inlet ports to the mixing chamber.
- the inlet fitting includes a male thread series that corresponds to a female thread series formed on the upstream end portion of the housing.
- the fluid inlet ports extend at an oblique angle with respect to the mixer assembly axis and the fluid provided by the first inlet port first contacts fluid provided by the second inlet port in the mixing chamber.
- the present invention also provides a chromatographic system that includes, inter alia, first and second solvent tanks, first and second pumps for drawing solvents from the tanks, and a mixer assembly.
- the first pump conditions a first solvent to have a desired pressure and flow velocity and the second pump conditions the second solvent to have a desired pressure and flow velocity.
- the mixer assembly includes a housing that has opposed upstream and downstream end portions.
- the upstream end portion of the housing has a fluid receiving section and the downstream end portion includes a fluid discharge section with a fluid outlet formed therein.
- the housing of the mixer assembly defines a central bore which extends between the fluid receiving section and fluid discharge section.
- An inlet fitting is engaged with the upstream end portion of the housing and has first and second fluid inlet ports formed therein that extend from the fitting exterior to the fluid receiving section of the housing.
- a mixer cartridge assembly is disposed within the central bore of the housing and is positioned between the inlet fitting and the downstream end portion of the housing.
- the mixer cartridge assembly includes a body portion, a plurality of spheres disposed within a central mixing chamber formed in the body portion, and mechanism for retaining the spheres in the mixing chamber.
- the central mixing chamber formed in the body portion of the mixer cartridge communicates with the fluid receiving section of the housing and the discharge port extends from the mixing chamber to the fluid outlet formed in the housing.
- the plurality of spheres disposed within the mixing chamber facilitates the mixing of fluids received therein.
- the disclosed mixer assembly is capable of mixing two or more fluid streams without adding significant dead volume to the system and produces a uniform combined stream that relaxes the need for very precise flow delivery from the system pumps.
- FIG. 1 is a schematic overview of a typical chromatographic system in which an embodiment of the present invention may be used;
- FIG. 2A is a perspective view of a fluid mixer assembly of the present invention
- FIG. 2B is a top elevational view of the fluid mixer assembly of FIG. 2A ;
- FIG. 2C is a cross-sectional view of the fluid mixer assembly of FIGS. 2A and 2B taken along line A-A of FIG. 2B ;
- FIG. 3A is a perspective view of a fluid mixer cartridge of the present invention.
- FIG. 3B is a top elevational view of the fluid mixer cartridge of FIG. 3A ;
- FIG. 3C is a cross-sectional view of the fluid mixer cartridge of FIGS. 3A and 3B taken along line A-A of FIG. 3B ;
- Fluid mixer assemblies in accordance with the invention are useful in a variety of applications that require two or more fluid streams to be mixed without adding significant volume to the system. Certain specific embodiments of the invention are described in detail below.
- FIGS. 2A through 2C a mixer assembly constructed in accordance with a preferred embodiment of the subject invention and designated generally by reference numeral 100 .
- “U” designates the upstream end of the mixer assembly 100 and “D” designates the downstream end.
- Mixer assembly 100 represents one embodiment of the invention that can be used in a variety of applications that require two fluid streams to be mixed without adding significant volume to the system.
- Mixer assembly 100 includes, inter alia, a housing 10 , an inlet fitting 40 and a mixer cartridge 60 .
- the housing 10 has opposed upstream and downstream end portions, 12 and 14 , respectively.
- the upstream end portion 12 of the housing 10 has a fluid receiving section 16 and the downstream end portion 14 includes a fluid discharge section 18 having a fluid outlet 20 formed therein.
- the housing 10 of the mixer assembly 100 defines a central bore 22 which extends axially between the fluid receiving section 16 and fluid discharge section 18 .
- the central bore 22 has a generally cylindrical outer circumference which is adapted for receiving the mixer cartridge 60 .
- An inlet fitting 40 is engaged with the upstream end portion 12 of the housing 10 and has a first fluid inlet port 42 and second fluid inlet port 44 formed therein.
- the inlet ports 42 and 44 extend from the fitting exterior to the fluid receiving section 16 of the housing 10 .
- the inlet ports 42 and 44 are formed at an angle with respect to the central axis “X” of the mixer assembly 100 .
- the downstream ends of the inlet ports 42 and 44 do not intersect within the inlet fitting 40 , but are angled so that the fluid streams exiting therefrom disperse in first and second frits/filter discs and then collide within mixing chamber 62 of cartridge 60 .
- Both the housing 10 and the inlet fitting 40 have a hexagonal exterior surface which facilitates the engagement of corresponding male and female threads, which are associated with the fitting and the upstream end portion of the housing, respectively.
- corresponding male and female threads which are associated with the fitting and the upstream end portion of the housing, respectively.
- other means can be used for securing the inlet fitting to the housing, such as for example, interlocking cam lugs.
- Mixer cartridge assembly 60 is disposed within the central bore 22 of the housing and is positioned between the inlet fitting 40 and the downstream end portion 18 of the housing 10 .
- the mixer cartridge assembly 60 is illustrated in FIGS. 3A through 3C and includes a body portion 64 and a plurality of spheres (not shown) disposed within a central mixing chamber 62 formed in the body portion. The spheres are retained within the mixing chamber 62 by a filter disc 67 included in ring 66 associated with the upstream end of the mixing chamber 60 and a filter disc 68 associated with a downstream end of the mixing chamber 62 .
- the spheres are made of glass, but those skilled in the art will readily appreciate that the spheres can be fabricated from other materials as dictated by the application for the mixer assembly (e.g., metal, plastic etc.).
- the gage of the filter disc 67 and 68 is selected so that the spheres are retained within the mixing chamber 62 , but the fluid enters and exits the mixing chamber relatively unobstructed.
- the filter ring 66 holds the filter disc 67 in place.
- other mechanisms can be employed for retaining the spheres within the mixing chamber without departing from the inventive aspects of the present disclosure.
- the spheres can be placed within a net or porous enclosure.
- the sphere can have a diameter that is larger than the diameters of fluid passages 83 a - 83 c (shown in FIG. 2 c ).
- the central mixing chamber 62 formed in the body portion of the mixer cartridge 60 communicates with the fluid receiving section 16 of the housing 10 and a discharge port 70 extends from the mixing chamber 62 to the fluid outlet 20 formed in the housing 10 .
- the plurality of spheres disposed within the mixing chamber facilitates the mixing of fluids received therein.
- Mixer assembly 100 also includes a prefilter ring 80 that is positioned within the central bore 22 and adjacent to the inlet fitting 40 .
- Prefilter ring 80 prevents particulate, which may be contained in the supplied fluid from entering the mixing chamber.
- a first fluid stream such as a solvent
- a second fluid stream such as a second solvent
- a second fluid stream such as a second solvent
- Each fluid exits the inlet fitting 40 at prefilter ring 80 and is filtered and dispersed prior to entering the mixing chamber through the filter disc 67 .
- the spheres contained within the mixing chamber 62 cause the two fluid streams to collide and mix in a uniform manner.
- the uniformly mixed fluid then exits the mixing chamber through the filter disc 68 and discharge port 70 and proceeds to the fluid outlet 20 of the mixer assembly 100 .
- the size of the mixing chamber 62 is selected so as to be of sufficient size to offset the flow velocity errors associated with solvent pumps. For example, if the first and second solvent pumps exhibit flow velocity errors that average out over a period of time “t”, then the size of the mixing chamber is selected such that the time necessary for the blend to pass through the mixer is greater than time “t.” Over the period of time “t”, each pump draws a volume of fluid from the tank. The free volume within the mixing chamber is a function of the overall size of the mixing chamber. The mixer performance is a function of the number and size of the spheres. Therefore, all of the above-described parameters are selectively adjusted so that the time necessary for the blend to pass through the mixer is greater than time “t.”
- Mixer assembly 100 produces a uniform combined fluid mix that relaxes the need for very precise flow delivery from the solvent supply pumps. Still further, mixer assembly 100 combines in a single device what, traditionally, would have been three devices: a tee, a filter, and a mixer.
- the disclosed mixer assembly can be used in any number of different fluid applications and is not limited to chromatographic applications. Moreover, a variety of materials can be used to form the parts of the mixer assembly, such as for example, stainless steel or plastic.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Treatment Of Liquids With Adsorbents In General (AREA)
Abstract
Disclosed is an assembly for mixing fluids (i.e., gases or liquids), and more particularly an assembly that accurately mixes two or more high-pressure fluid sources and is adapted for use in applications, such as for example, chromatography. The mixer assembly includes, inter alia, a housing, an inlet fitting, and a mixer cartridge assembly. The housing has a fluid receiving section and a fluid discharge section with a fluid outlet formed therein. A central bore extends between the fluid receiving section and fluid discharge section. An inlet fitting is engaged with the housing and has first and second fluid inlet ports formed therein that extend from the fitting exterior to the fluid receiving section of the housing. A mixer cartridge assembly is disposed within the central bore of the housing and is positioned between the inlet fitting and the downstream end portion of the housing. The mixer cartridge assembly includes a body portion, a plurality of spheres disposed within a central mixing chamber formed in the body portion, and mechanism for retaining the spheres in the mixing chamber.
Description
- This application claims the benefit of U.S. Provisional Application No. 60/587,581 filed Jul. 13, 2004, the entire contents of which are incorporated herein by reference.
- 1. Field of the Invention
- The subject invention relates to an assembly for mixing fluids (i.e., gases or liquids), and more particularly to an assembly that accurately mixes two or more high-pressure fluid sources and is adapted for use in applications, such as for example, chromatography.
- 2. Background of the Related Art
- In many chemical or industrial processes and applications, the need to accurately mix or combine two or more fluids is a necessary and important step in the production line. For example, in a chromatographic process, the accuracy of the solvent mixture (i.e., mixture of two or more solvents) affects the precision and accuracy of the subsequent chromatographic analysis.
- Chromatography is a process for separating mixtures by virtue of their differences in absorbency.
FIG. 1 illustrates a typical chromatographic process. Although there are other types of chromatography (e.g. paper and thin layer), most modern applications include a mobile phase and a stationary phase and the separation of the fluid mixture takes place in a column. The column is usually a glass or metal tube of sufficient strength to withstand the pressures that may be applied across it. The column can be for example, a packed bed or open tubular column. The column contains the stationary phase of the process, i.e., the material for which the components to be separated have varying affinities. The mobile phase of the chromatographic process is comprised of a solvent mixture into which the sample to be analyzed is injected. The mobile phase enters the column and the sample is absorbed onto the stationary phase. The solvent mixture is not absorbed on the stationary phase, but passes through the column. - The materials that comprise the mobile and the stationary phase vary depending on the general type of chromatographic process being performed, i.e., gas or liquid chromatography. The mobile phase in gas chromatography is generally an inert gas. The stationary phase is generally an adsorbent or liquid distributed or the surface of a porous, inert support. The mobile phase in liquid chromatography is a liquid of low viscosity that flows through the stationary bed. This may be comprised of an immiscible liquid coated onto a porous support, a thin film of liquid phase bonded to the surface of a sorbent, or a sorbent of controlled pore size.
- As illustrated in
FIG. 1 , a first pump is used to draw a first solvent from a tank and supply it at a desired flow velocity and pressure to a T-shaped piping connector. A second pump is used to draw a second solvent from a second tank and supply it at a desired flow velocity and pressure to the T-shaped piping connector. At the T-shaped piping connector, the solvents are blended to achieve a solvent mixture having desired properties. The flow velocity of each solvent can be adjusted over time so as to vary the composition of the solvent mixture over time. A variation in the solvent mixture over time is called a solvent or compositional gradient. - A third pump is used to supply the sample or feed to a second T-shaped piping connection where it is injected into the solvent mixture and blended therewith, forming the mobile phase. The mobile phase runs through the column typically by action of the first and second pumps whereby the sample is absorbed onto the stationary phase. As the sample flows through the column, its different components will adsorb to the stationary phase to varying degrees. Those with strong attraction to the support move more slowly than those with weak attraction and this is how the components are separated. After the sample is flushed or displaced from the stationary phase, the different components will elute from the column at different times. The components with the least affinity for the stationary phase will elute first, while those with the greatest affinity for the stationary phase will elute last. A detector analyses the emerging stream by measuring a property, which is related to concentration and characteristic of chemical composition. For example, the refractive index or ultra-violet absorbance is measured.
- In high pressure, low dead volume chromatography applications, uniform solvent mixtures and precise solvent gradients are required and consequently, very precise flow streams from the solvent pumps are necessary. A solvent flow transient caused by either the first or the second pump produces a solvent gradient error that affects the precision and accuracy of the chromatographic analysis. Unfortunately, all presently available pumps have flow transients to some extent. In view of the above, there is a need for a mixer assembly that is capable of mixing two or more fluid streams without adding significant dead volume to the system and produces a uniform combined stream that relaxes the need for very precise flow delivery from the system pumps.
- The invention provides a device or mixer assembly that accurately mixes two or more streams of fluids, even at high pressure. The mixer assembly includes a housing that has opposed upstream and downstream end portions. The upstream end portion of the housing has a fluid receiving section and the downstream end portion includes a fluid discharge section with a fluid outlet formed therein. The housing of the mixer assembly defines a central bore which extends between the fluid receiving section and fluid discharge section.
- An inlet fitting is engaged with the upstream end portion of the housing and has first and second fluid inlet ports formed therein that extend from the fitting exterior to the fluid receiving section of the housing.
- A mixer cartridge assembly is disposed within the central bore of the housing and is positioned between the inlet fitting and the downstream end portion of the housing. The mixer cartridge assembly includes a body portion, a plurality of spheres disposed within a central mixing chamber formed in the body portion, and mechanism for retaining the spheres in the mixing chamber.
- The central mixing chamber formed in the body portion of the mixer cartridge communicates with the fluid receiving section of the housing and the discharge port extends from the mixing chamber to the fluid outlet formed in the housing. The plurality of spheres disposed within the mixing chamber facilitates the mixing of fluids received therein.
- In one preferred embodiment, the mechanism for retaining the spheres within the mixing chamber includes a filter ring associated with the upstream end of the mixing chamber and a filter disc associated with a downstream end of the mixing chamber.
- It is envisioned that the mixer assembly can further include a filter element that is axially disposed between the inlet fitting and the mixer cartridge assembly. The filter element removes unwanted particles from the fluid provided from each of the first and second inlet ports to the mixing chamber. In a preferred embodiment, the inlet fitting includes a male thread series that corresponds to a female thread series formed on the upstream end portion of the housing. It is also envisioned that the fluid inlet ports extend at an oblique angle with respect to the mixer assembly axis and the fluid provided by the first inlet port first contacts fluid provided by the second inlet port in the mixing chamber.
- The present invention also provides a chromatographic system that includes, inter alia, first and second solvent tanks, first and second pumps for drawing solvents from the tanks, and a mixer assembly. The first pump conditions a first solvent to have a desired pressure and flow velocity and the second pump conditions the second solvent to have a desired pressure and flow velocity.
- The mixer assembly includes a housing that has opposed upstream and downstream end portions. The upstream end portion of the housing has a fluid receiving section and the downstream end portion includes a fluid discharge section with a fluid outlet formed therein. The housing of the mixer assembly defines a central bore which extends between the fluid receiving section and fluid discharge section.
- An inlet fitting is engaged with the upstream end portion of the housing and has first and second fluid inlet ports formed therein that extend from the fitting exterior to the fluid receiving section of the housing.
- A mixer cartridge assembly is disposed within the central bore of the housing and is positioned between the inlet fitting and the downstream end portion of the housing. The mixer cartridge assembly includes a body portion, a plurality of spheres disposed within a central mixing chamber formed in the body portion, and mechanism for retaining the spheres in the mixing chamber.
- The central mixing chamber formed in the body portion of the mixer cartridge communicates with the fluid receiving section of the housing and the discharge port extends from the mixing chamber to the fluid outlet formed in the housing. The plurality of spheres disposed within the mixing chamber facilitates the mixing of fluids received therein.
- The disclosed mixer assembly is capable of mixing two or more fluid streams without adding significant dead volume to the system and produces a uniform combined stream that relaxes the need for very precise flow delivery from the system pumps.
- So that those having ordinary skill in the art to which the disclosed system appertains will more readily understand how to make and use the same, reference may be had to the drawings wherein:
-
FIG. 1 is a schematic overview of a typical chromatographic system in which an embodiment of the present invention may be used; -
FIG. 2A is a perspective view of a fluid mixer assembly of the present invention; -
FIG. 2B is a top elevational view of the fluid mixer assembly ofFIG. 2A ; -
FIG. 2C is a cross-sectional view of the fluid mixer assembly ofFIGS. 2A and 2B taken along line A-A ofFIG. 2B ; -
FIG. 3A is a perspective view of a fluid mixer cartridge of the present invention; -
FIG. 3B is a top elevational view of the fluid mixer cartridge ofFIG. 3A ; and -
FIG. 3C is a cross-sectional view of the fluid mixer cartridge ofFIGS. 3A and 3B taken along line A-A ofFIG. 3B ; - These and other features of the mixer assembly of the present application will become more readily apparent to those having ordinary skill in the art from the following detailed description of the preferred embodiments.
- Fluid mixer assemblies in accordance with the invention are useful in a variety of applications that require two or more fluid streams to be mixed without adding significant volume to the system. Certain specific embodiments of the invention are described in detail below.
- Referring now to the drawings, there is illustrated in
FIGS. 2A through 2C , a mixer assembly constructed in accordance with a preferred embodiment of the subject invention and designated generally byreference numeral 100. InFIG. 2C , “U” designates the upstream end of themixer assembly 100 and “D” designates the downstream end.Mixer assembly 100 represents one embodiment of the invention that can be used in a variety of applications that require two fluid streams to be mixed without adding significant volume to the system. -
Mixer assembly 100 includes, inter alia, ahousing 10, an inlet fitting 40 and amixer cartridge 60. Thehousing 10 has opposed upstream and downstream end portions, 12 and 14, respectively. The upstream end portion 12 of thehousing 10 has a fluid receiving section 16 and thedownstream end portion 14 includes afluid discharge section 18 having afluid outlet 20 formed therein. Thehousing 10 of themixer assembly 100 defines a central bore 22 which extends axially between the fluid receiving section 16 andfluid discharge section 18. The central bore 22 has a generally cylindrical outer circumference which is adapted for receiving themixer cartridge 60. - An inlet fitting 40 is engaged with the upstream end portion 12 of the
housing 10 and has a firstfluid inlet port 42 and secondfluid inlet port 44 formed therein. Theinlet ports housing 10. As shown inFIG. 2C , theinlet ports mixer assembly 100. Additionally, the downstream ends of theinlet ports chamber 62 ofcartridge 60. - Both the
housing 10 and the inlet fitting 40 have a hexagonal exterior surface which facilitates the engagement of corresponding male and female threads, which are associated with the fitting and the upstream end portion of the housing, respectively. Those skilled in the art will recognize that other means can be used for securing the inlet fitting to the housing, such as for example, interlocking cam lugs. -
Mixer cartridge assembly 60 is disposed within the central bore 22 of the housing and is positioned between the inlet fitting 40 and thedownstream end portion 18 of thehousing 10. Themixer cartridge assembly 60 is illustrated inFIGS. 3A through 3C and includes abody portion 64 and a plurality of spheres (not shown) disposed within acentral mixing chamber 62 formed in the body portion. The spheres are retained within the mixingchamber 62 by afilter disc 67 included inring 66 associated with the upstream end of the mixingchamber 60 and afilter disc 68 associated with a downstream end of the mixingchamber 62. Preferably the spheres are made of glass, but those skilled in the art will readily appreciate that the spheres can be fabricated from other materials as dictated by the application for the mixer assembly (e.g., metal, plastic etc.). The gage of thefilter disc chamber 62, but the fluid enters and exits the mixing chamber relatively unobstructed. Thefilter ring 66 holds thefilter disc 67 in place. In alternative embodiments, other mechanisms can be employed for retaining the spheres within the mixing chamber without departing from the inventive aspects of the present disclosure. For example, the spheres can be placed within a net or porous enclosure. Alternatively, the sphere can have a diameter that is larger than the diameters of fluid passages 83 a-83 c (shown inFIG. 2 c). - The
central mixing chamber 62 formed in the body portion of themixer cartridge 60 communicates with the fluid receiving section 16 of thehousing 10 and adischarge port 70 extends from the mixingchamber 62 to thefluid outlet 20 formed in thehousing 10. The plurality of spheres disposed within the mixing chamber facilitates the mixing of fluids received therein. -
Mixer assembly 100 also includes aprefilter ring 80 that is positioned within the central bore 22 and adjacent to the inlet fitting 40.Prefilter ring 80 prevents particulate, which may be contained in the supplied fluid from entering the mixing chamber. - In operation, a first fluid stream, such as a solvent, is supplied to the
first inlet port 42 by a first pump and a second fluid stream, such as a second solvent, is supplied to thesecond inlet port 44 by a second pump. Each fluid exits the inlet fitting 40 atprefilter ring 80 and is filtered and dispersed prior to entering the mixing chamber through thefilter disc 67. The spheres contained within the mixingchamber 62 cause the two fluid streams to collide and mix in a uniform manner. The uniformly mixed fluid then exits the mixing chamber through thefilter disc 68 anddischarge port 70 and proceeds to thefluid outlet 20 of themixer assembly 100. - The size of the mixing
chamber 62 is selected so as to be of sufficient size to offset the flow velocity errors associated with solvent pumps. For example, if the first and second solvent pumps exhibit flow velocity errors that average out over a period of time “t”, then the size of the mixing chamber is selected such that the time necessary for the blend to pass through the mixer is greater than time “t.” Over the period of time “t”, each pump draws a volume of fluid from the tank. The free volume within the mixing chamber is a function of the overall size of the mixing chamber. The mixer performance is a function of the number and size of the spheres. Therefore, all of the above-described parameters are selectively adjusted so that the time necessary for the blend to pass through the mixer is greater than time “t.” - It should be noted that it is desirable to keep the size of the mixing chamber as small as practicable, thereby limiting the dead volume in the system (e.g., the volume of the fluid system from the entrance of the mixing chamber to the column). Dead volume in a chromatographic system is undesirable. During the chromatographic process, changes in the solvent composition are commanded. It is desired that these commands result in a stepped change in the solvent mixture. However, if there is too much dead volume in the system, the stepped change in the mixture is smoothed out, thereby adversely impacting the accuracy of the chromatographic analysis.
-
Mixer assembly 100 produces a uniform combined fluid mix that relaxes the need for very precise flow delivery from the solvent supply pumps. Still further,mixer assembly 100 combines in a single device what, traditionally, would have been three devices: a tee, a filter, and a mixer. - Those skilled in the art would readily appreciate that the disclosed mixer assembly can be used in any number of different fluid applications and is not limited to chromatographic applications. Moreover, a variety of materials can be used to form the parts of the mixer assembly, such as for example, stainless steel or plastic.
- Although the invention has been described with respect to preferred embodiments, those skilled in the art will readily appreciate that various changes and/or modifications can be made to the invention without departing from the spirit or scope of the invention as defined by the appended claims.
Claims (17)
1. A mixer assembly comprising:
a) a housing having opposed upstream and downstream end portions, the upstream end portion including a fluid receiving section, the downstream end portion including a fluid discharge section having a fluid outlet formed therein, the mixer housing defining a central bore which extends axially between the fluid receiving section and fluid discharge section;
b) an inlet fitting engaged with the upstream end portion of the housing and having first and second fluid inlet ports formed therein that extend from the fitting exterior to the fluid receiving section of the housing; and
c) a mixer cartridge assembly disposed within the central bore of the housing and positioned between the inlet fitting and the downstream end portion of the housing, the mixer cartridge assembly including:
i. a body portion defining a central mixing chamber and a discharge port, the central mixing chamber communicating with the fluid receiving section of the housing and the discharge port extends from the mixing chamber to the fluid outlet formed in the housing;
ii. a plurality of spheres disposed within the mixing chamber for facilitating the mixing of fluids received therein; and
iii. a mechanism for retaining the spheres within the mixing chamber.
2. A mixer assembly as recited in claim 1 , wherein the mechanisms for retaining the spheres within the mixing chamber includes a filter disc associated with an upstream end of the mixing chamber and a filter disc associated with a downstream end of the mixing chamber.
3. A mixer assembly as recited in claim 1 , further comprising a filter element axially disposed between the inlet fitting and the mixer cartridge assembly.
4. A mixer assembly as recited in claim 1 , wherein the inlet fitting includes a male thread series that corresponds to a female thread series formed on the upstream end portion of the housing.
5. A mixer assembly as recited in claim 1 , wherein the fluid inlet ports extend at an oblique angle with respect to the mixer assembly axis.
6. A mixer assembly as recited in claim 1 , wherein fluid provided by the first inlet port first contacts fluid provided by the second inlet port in the mixing chamber.
7. A chromatographic system comprising:
a) a first solvent tank containing a first solvent;
b) a second solvent tank containing a second solvent;
c) a first pump for drawing the first solvent from the first solvent tank and conditioning the first solvent to have a desired flow velocity;
d) a second pump for drawing the second solvent from the second solvent tank and conditioning the second solvent to have a desired flow velocity; and
e) a mixer assembly including:
i. a housing having opposed upstream and downstream end portions, the upstream end portion including a fluid receiving section, the downstream end portion including a fluid discharge section having a fluid outlet formed therein, the mixer housing defining a central bore which extends axially between the fluid receiving section and fluid discharge section;
ii. an inlet fitting engaged with the upstream end portion of the housing and having first and second fluid inlet ports formed therein that extend from the fitting exterior to the fluid receiving section of the housing; and
iii. a mixer cartridge assembly disposed within the central bore of the housing and positioned between the inlet fitting and the downstream end portion of the housing, the mixer cartridge assembly including:
a body portion that defines a central mixing chamber and a discharge port, the central mixing chamber communicating with the fluid receiving section of the housing and the discharge port extends from the mixing chamber to the fluid outlet formed in the housing;
a plurality of spheres disposed within the mixing chamber for facilitating the mixing of fluids received therein; and
a mechanism for retaining the spheres within the mixing chamber.
8. A chromatographic system as recited in claim 7 , wherein the first pump exhibits flow transients and the size of the mixing chamber is selected based on duration of a typical flow transient.
9. A chromatographic system as recited in claim 7 , wherein the mechanism for retaining the spheres within the mixing chamber includes a filter disc associated with an upstream end of the mixing chamber and a filter disc associated with a downstream end of the mixing chamber.
10. A chromatographic system as recited in claim 7 , further comprising a filter element axially disposed between the inlet fitting and the mixer cartridge assembly.
11. A chromatographic system as recited in claim 7 , wherein the inlet fitting includes a male thread series that corresponds to a female thread series formed on the upstream end portion of the housing.
12. A chromatographic system as recited in claim 7 , wherein the fluid inlet ports extend at an oblique angle with respect to the mixer assembly axis.
13. A chromatographic system as recited in claim 7 , wherein fluid provided by the first inlet port first contacts fluid provided by the second inlet port in the mixing chamber.
14. A chromatographic system as recited in claim 7 , further comprising a column in fluid communication with the mixer assembly.
15. A chromatographic system as recited in claim 14 , further comprising a chromatographic detector operatively associated with the column.
16. A mixer assembly for use in a chromatographic system comprising:
a) a housing having opposed upstream and downstream end portions, the upstream end portion including a fluid receiving section, the downstream end portion including a fluid discharge section having a fluid outlet formed therein, the mixer housing defining a central bore which extends axially between the fluid receiving section and fluid discharge section;
b) an inlet fitting engaged with the upstream end portion of the housing and having first and second fluid inlet ports formed therein that extend from the fitting exterior to the fluid receiving section of the housing;
c) a mixer cartridge assembly disposed within the central bore of the housing and positioned between the inlet fitting and the downstream end portion of the housing, the mixer cartridge assembly including:
i. a body portion defining a central mixing chamber and a discharge port, the central mixing chamber communicates with the fluid receiving section of the housing and the discharge port extends from the mixing chamber to the fluid outlet formed in the housing;
ii. a plurality of spheres disposed within the mixing chamber for facilitating the mixing of fluids received therein; and
iii. a mechanism for retaining the spheres within the mixing chamber; and
d) a filter element axially disposed between the inlet fitting and the mixer cartridge assembly for conditioning fluid exiting the first and second inlet ports.
17. The mixer assembly as recited in claim 14 , wherein the means for retaining the spheres within the mixing chamber includes a filter disc associated with an upstream end of the mixing chamber and a filter disc associated with a downstream end of the mixing chamber.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/631,221 US20090294344A1 (en) | 2004-07-13 | 2005-06-29 | Fluid mixer assembly |
US14/830,611 US10335753B2 (en) | 2004-07-13 | 2015-08-19 | Fluid mixer assembly |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US58758104P | 2004-07-13 | 2004-07-13 | |
PCT/US2005/023392 WO2006017039A1 (en) | 2004-07-13 | 2005-06-29 | Fluid mixer assembly |
US11/631,221 US20090294344A1 (en) | 2004-07-13 | 2005-06-29 | Fluid mixer assembly |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2005/023392 A-371-Of-International WO2006017039A1 (en) | 2004-07-13 | 2005-06-29 | Fluid mixer assembly |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/830,611 Continuation US10335753B2 (en) | 2004-07-13 | 2015-08-19 | Fluid mixer assembly |
Publications (1)
Publication Number | Publication Date |
---|---|
US20090294344A1 true US20090294344A1 (en) | 2009-12-03 |
Family
ID=35839566
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/631,221 Abandoned US20090294344A1 (en) | 2004-07-13 | 2005-06-29 | Fluid mixer assembly |
US14/830,611 Active 2027-12-13 US10335753B2 (en) | 2004-07-13 | 2015-08-19 | Fluid mixer assembly |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/830,611 Active 2027-12-13 US10335753B2 (en) | 2004-07-13 | 2015-08-19 | Fluid mixer assembly |
Country Status (5)
Country | Link |
---|---|
US (2) | US20090294344A1 (en) |
JP (3) | JP2008506948A (en) |
DE (1) | DE112005001674B4 (en) |
GB (1) | GB2432328B (en) |
WO (1) | WO2006017039A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014085003A3 (en) * | 2012-11-30 | 2014-07-31 | Agilent Technologies, Inc. | Mixer bypass sample injection for liquid chromatography |
US20140230528A1 (en) * | 2011-06-17 | 2014-08-21 | Waters Technologies Corporation | Turbulent flow mixing device for use in a chromatography system |
CN112691568A (en) * | 2021-01-12 | 2021-04-23 | 陕西青叶生物科技有限公司 | Mixing stirrer for preparing hypochlorous acid solution |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9132393B1 (en) * | 2012-04-28 | 2015-09-15 | Michael Ross | Foam generator for mixing air and washing chemicals to create foam |
GB2524147B (en) * | 2014-02-06 | 2016-02-10 | Waters Technologies Corp | Method for high pressure gradient chromatography using pump stroke control |
DE102016000596A1 (en) * | 2016-01-22 | 2017-08-17 | Washtec Holding Gmbh | Device for producing a ready-to-use solution from a concentrate |
US11185830B2 (en) | 2017-09-06 | 2021-11-30 | Waters Technologies Corporation | Fluid mixer |
CN109959745A (en) * | 2017-12-22 | 2019-07-02 | 苏州普源精电科技有限公司 | A kind of mixer and liquid chromatograph |
WO2020144865A1 (en) * | 2019-01-11 | 2020-07-16 | 株式会社島津製作所 | Mixer used in liquid chromatograph, and liquid chromatograph |
US11555805B2 (en) | 2019-08-12 | 2023-01-17 | Waters Technologies Corporation | Mixer for chromatography system |
WO2021220164A1 (en) * | 2020-04-29 | 2021-11-04 | Waters Technologies Corporation | System and method for solvent mixing in a chromatography system |
US11898999B2 (en) | 2020-07-07 | 2024-02-13 | Waters Technologies Corporation | Mixer for liquid chromatography |
WO2022010666A1 (en) | 2020-07-07 | 2022-01-13 | Waters Technologies Corporation | Combination mixer arrangement for noise reduction in fluid chromatography |
WO2022066752A1 (en) | 2020-09-22 | 2022-03-31 | Waters Technologies Corporation | Continuous flow mixer |
CN114486644B (en) * | 2022-04-01 | 2022-08-23 | 潍柴动力股份有限公司 | Mixing visual test bed and mixing uniformity detection method |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4121906A (en) * | 1976-11-01 | 1978-10-24 | Oldham Dale R | Resin mixing and delivery device |
US4204775A (en) * | 1978-08-08 | 1980-05-27 | General Dynamics Corporation Pomona Division | Mixing device for simultaneously dispensing two-part liquid compounds from packaging kit |
US4270921A (en) * | 1979-09-24 | 1981-06-02 | Graas Joseph E | Microchromatographic device and method for rapid determination of a desired substance |
US4506987A (en) * | 1982-09-08 | 1985-03-26 | The United States Of America As Represented By The United States Department Of Energy | High pressure liquid chromatographic gradient mixer |
US5738783A (en) * | 1994-05-09 | 1998-04-14 | Shiseido Company, Ltd. | Liquid chromatograph having a micro- and semi-micro column |
US6048496A (en) * | 1996-06-05 | 2000-04-11 | Gi Sciences Incorporated | Mixer for liquid chromatograph |
US6581442B1 (en) * | 1999-05-19 | 2003-06-24 | Eisai Co., Ltd. | Splitted tubing apparatus for gradient high performance liquid chromatography |
US20040042340A1 (en) * | 2002-08-28 | 2004-03-04 | Shimadzu Corporation | Mixer for liquid chromatograph |
US6790361B2 (en) * | 2000-11-21 | 2004-09-14 | Waters Corporation | Mobile phase dilution scheme for enhanced chromatography |
US20050252840A1 (en) * | 2004-05-13 | 2005-11-17 | Eksigent Technologies, Llc | Micromixer |
US7875361B2 (en) * | 2005-11-09 | 2011-01-25 | Ems-Chemie Ag | Metallically coated light-reflecting components based on thermoplastic molding compounds |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2263769C2 (en) | 1972-12-28 | 1974-10-03 | Hewlett-Packard Gmbh, 7030 Boeblingen | Mixing device |
DE3037898A1 (en) * | 1980-10-07 | 1982-05-06 | Bruker Analytische Meßtechnik GmbH, 7512 Rheinstetten | MIXING CHAMBER |
JPH0822375B2 (en) * | 1987-04-30 | 1996-03-06 | ノードソン株式会社 | Collision-type mixed discharge or ejection method of liquid and its apparatus |
JPH02152532A (en) * | 1988-12-02 | 1990-06-12 | Minoru Nakamura | Liquid mixing device |
JPH02170047A (en) * | 1988-12-23 | 1990-06-29 | Yokogawa Electric Corp | Solvent mixer for liquid chromatography |
IT1228283B (en) * | 1989-01-04 | 1991-06-07 | Erba Strumentazione | PROCEDURE AND MIXING DEVICE FOR SMALL VOLUMES. |
JP2833126B2 (en) * | 1990-03-28 | 1998-12-09 | 株式会社島津製作所 | High-performance liquid chromatograph |
JP2587162Y2 (en) * | 1991-11-15 | 1998-12-14 | ジーエルサイエンス株式会社 | Liquid chromatograph mixer |
JP3023399B2 (en) * | 1993-11-26 | 2000-03-21 | 三井化学株式会社 | Two-part mixing device |
JPH11133011A (en) * | 1997-10-28 | 1999-05-21 | Hitachi Ltd | Liquid chromatograph |
US6497820B1 (en) * | 1998-02-03 | 2002-12-24 | Arqule, Inc. | Rapid method for separation of small molecules using reverse phase high performance liquid chromatography |
EP1053464A1 (en) * | 1998-02-03 | 2000-11-22 | Arqule, Inc. | Rapid method for separation of small molecules using reverse phase high performance liquid chromatography |
DE10112904C5 (en) * | 2001-03-15 | 2010-04-22 | 3M Espe Ag | Dynamic mixer and method for mixing at least two paste components |
US6695224B2 (en) * | 2001-04-20 | 2004-02-24 | Bayer Polymers Llc | Spray nozzle for a two-component air-assisted, low pressure spray system |
-
2005
- 2005-06-29 JP JP2007521492A patent/JP2008506948A/en not_active Withdrawn
- 2005-06-29 US US11/631,221 patent/US20090294344A1/en not_active Abandoned
- 2005-06-29 WO PCT/US2005/023392 patent/WO2006017039A1/en active Application Filing
- 2005-06-29 GB GB0701052A patent/GB2432328B/en active Active
- 2005-06-29 DE DE112005001674.9T patent/DE112005001674B4/en active Active
-
2012
- 2012-08-07 JP JP2012175009A patent/JP5833990B2/en not_active Expired - Fee Related
-
2015
- 2015-08-19 US US14/830,611 patent/US10335753B2/en active Active
- 2015-09-24 JP JP2015186881A patent/JP2016029377A/en active Pending
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4121906A (en) * | 1976-11-01 | 1978-10-24 | Oldham Dale R | Resin mixing and delivery device |
US4204775A (en) * | 1978-08-08 | 1980-05-27 | General Dynamics Corporation Pomona Division | Mixing device for simultaneously dispensing two-part liquid compounds from packaging kit |
US4270921A (en) * | 1979-09-24 | 1981-06-02 | Graas Joseph E | Microchromatographic device and method for rapid determination of a desired substance |
US4506987A (en) * | 1982-09-08 | 1985-03-26 | The United States Of America As Represented By The United States Department Of Energy | High pressure liquid chromatographic gradient mixer |
US5738783A (en) * | 1994-05-09 | 1998-04-14 | Shiseido Company, Ltd. | Liquid chromatograph having a micro- and semi-micro column |
US6048496A (en) * | 1996-06-05 | 2000-04-11 | Gi Sciences Incorporated | Mixer for liquid chromatograph |
US6581442B1 (en) * | 1999-05-19 | 2003-06-24 | Eisai Co., Ltd. | Splitted tubing apparatus for gradient high performance liquid chromatography |
US6790361B2 (en) * | 2000-11-21 | 2004-09-14 | Waters Corporation | Mobile phase dilution scheme for enhanced chromatography |
US20040042340A1 (en) * | 2002-08-28 | 2004-03-04 | Shimadzu Corporation | Mixer for liquid chromatograph |
US20050252840A1 (en) * | 2004-05-13 | 2005-11-17 | Eksigent Technologies, Llc | Micromixer |
US7875361B2 (en) * | 2005-11-09 | 2011-01-25 | Ems-Chemie Ag | Metallically coated light-reflecting components based on thermoplastic molding compounds |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140230528A1 (en) * | 2011-06-17 | 2014-08-21 | Waters Technologies Corporation | Turbulent flow mixing device for use in a chromatography system |
WO2014085003A3 (en) * | 2012-11-30 | 2014-07-31 | Agilent Technologies, Inc. | Mixer bypass sample injection for liquid chromatography |
CN104813164A (en) * | 2012-11-30 | 2015-07-29 | 安捷伦科技有限公司 | Mixer bypass sample injection for liquid chromatography |
US9945820B2 (en) | 2012-11-30 | 2018-04-17 | Agilent Technologies, Inc. | Mixer bypass sample injection for liquid chromatography |
US10209229B2 (en) | 2012-11-30 | 2019-02-19 | Agilent Technologies, Inc. | Mixer bypass sample injection for liquid chromatography |
CN112691568A (en) * | 2021-01-12 | 2021-04-23 | 陕西青叶生物科技有限公司 | Mixing stirrer for preparing hypochlorous acid solution |
Also Published As
Publication number | Publication date |
---|---|
JP2016029377A (en) | 2016-03-03 |
JP2013011608A (en) | 2013-01-17 |
US10335753B2 (en) | 2019-07-02 |
WO2006017039A1 (en) | 2006-02-16 |
GB0701052D0 (en) | 2007-02-28 |
GB2432328B (en) | 2009-05-06 |
JP2008506948A (en) | 2008-03-06 |
DE112005001674B4 (en) | 2018-02-08 |
DE112005001674T5 (en) | 2007-09-06 |
GB2432328A (en) | 2007-05-23 |
US20160184786A1 (en) | 2016-06-30 |
JP5833990B2 (en) | 2015-12-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10335753B2 (en) | Fluid mixer assembly | |
US10928365B2 (en) | Chromatography columns, systems and methods | |
US5887977A (en) | Stationary in-line mixer | |
Huber et al. | Optimal design of tubular and packed-bed homogeneous flow chemical reactors for column liquid chromatography | |
US11255465B2 (en) | Microfluidic check valve and related devices and systems | |
EP2158480B1 (en) | Method for screening mobile phases in chromatography systems | |
US4116837A (en) | High pressure liquid chromatography apparatus | |
US20120132794A1 (en) | Apparatus And Components Thereof For Liquid Chromatography | |
JPH06324026A (en) | Liquid chromatrography device | |
JP7259870B2 (en) | Mixers and liquid chromatographs used in liquid chromatographs | |
US11898999B2 (en) | Mixer for liquid chromatography | |
US11988647B2 (en) | Combination mixer arrangement for noise reduction in liquid chromatography | |
JP7081059B2 (en) | Liquid chromatography member | |
RU2212662C2 (en) | Facility to meter out sample into gas chromatograph | |
Moskvin et al. | Automation of Sample Preparation Using Principles of Chromatomembrane Separation Methods in the Analysis of Aqueous and Air Media | |
EP2035823B1 (en) | Separation device and chemical reaction apparatus made from polycrystalline diamond, apparatuses including same such as separation apparatuses, and methods of use | |
CS250741B1 (en) | Reservoir for liquid mixing |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: WATERS TECHNOLOGIES CORPORATION,MASSACHUSETTS Free format text: MERGER;ASSIGNOR:WATERS INVESTMENTS LIMITED;REEL/FRAME:022837/0404 Effective date: 20081117 Owner name: WATERS TECHNOLOGIES CORPORATION, MASSACHUSETTS Free format text: MERGER;ASSIGNOR:WATERS INVESTMENTS LIMITED;REEL/FRAME:022837/0404 Effective date: 20081117 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |