Abstract: In the case of a homogenizer device for dispersing and/or homogenizing substances capable of flow, having a container having one or more inlet openings for introducing the substances to be homogenized, which container has a container outlet opening for feeding the substances into a processing unit disposed below the bottom, in a central region of its bottom, which unit contains two gear rims, which are mounted to rotate independent of one another, are disposed concentrically and configured in circular shape, and are separated from one another by way of a predetermined interstice, effective homogenization, which can be adapted to a predetermined substance mixture, is achieved in that the drive shafts of a first gear rim and of a second gear rim of the processing unit are disposed perpendicular to the transport direction of the substances that leave the outlet opening, in each instance.

Abstract: A cement mixing method for mixing cement used in cementing oil wells casing and the mixer used in that method. The mixer employs a straight bulk cement inlet, five annular recirculation jets and five annular water jet orifices located downstream of the recirculation jets so that all of the jets discharge at an angle towards the mixing chamber and the discharge from the water jet orifices intersects with the flow from the recirculation jets. This five jet, intersecting flow design allows for more thorough wetting of the cement powder with a smaller, lighter, less expensive and more durable mixer that is less inclined to foul and easier to clean.

Abstract: A cement mixing method for mixing cement used in cementing oil wells casing and the mixer used in that method. The mixer employs a straight bulk cement inlet, five annular recirculation jets and five annular water jet orifices located downstream of the recirculation jets so that all of the jets discharge at an angle towards the mixing chamber and the discharge from the water jet orifices intersects with the flow from the recirculation jets. This five jet, intersecting flow design allows for more thorough wetting of the cement powder with a smaller, lighter, less expensive and more durable mixer that is less inclined to foul and easier to clean.

Abstract: A method or device for integrated dosing and intermixing of small amounts of liquid, has a first liquid conveyed into or onto a first reservoir (3). A second reservoir (1) is entirely filled with a second liquid. The first and second liquids are brought into contact with each other via at least one joining duct structure (5) which has at least one area provided with a smaller cross section than the reservoirs (1,3) in the viewing direction of the connecting line between the two reservoirs (1,3). A laminar flow pattern is created along at least one portion of the joining duct structure (5), with the liquids thoroughly mixed in the second reservoir (1).

Abstract: An apparatus for dosing and mixing solid powders in technological processes for converting plastic materials, comprising an assembly for dosing the solid powders to be mixed with a first process liquid before mixing with an additional process liquid, the dosage assembly comprising at least one hydraulic cylinder for introducing the powders at a preset pressure which is correlated to the pressure of the first process liquid kept at a controlled pressure.

Abstract: A system for mixing the solid and liquid contents of a tank having an increased height using at least one flow generating device positioned proximate an outer wall of the tank and directed in a direction to discharge a flow having a rotational component and a generally upward component. A plurality of such flow generating devices may be positioned in one or more rings at various elevations within the tank. The flow generating devices are positioned such that resultant fluid flows within the tank contents include a flow in a generally rotational direction and a flow having components generally upward in the outer portion of the tank, inward in the upper portion of the tank, downward in the center portion of the tank, and outward in the lower portion of the tank.

Abstract: An agitator for agitating a melt includes a heat-resistive container having a blast opening through which cooling air is blown and an exhaust opening for exhausting air having been subjected to heat exchange, and a rotating magnet assembly composed of a permanent magnet housed in the heat-resistive container in a rotatable manner, magnetic lines of force emitted from the permanent magnet penetrating through the heat-resistive container to exit outside, and then penetrating the heat-resistive container again to return to the permanent magnet.

Abstract: A mix head assembly for use in the manufacture of chemical mechanical polishing pad polishing layers is provided, wherein inclusions of entrained gas inclusion defects are minimized.

Abstract: A mixer nozzle assembly for mixing fluid introduced into a tank having a tank volume therein. The mixer nozzle assembly includes a stationary body and a rotatable body mounted on the stationary body for rotation about an axis in a predetermined direction. The fluid flows through the stationary body to the rotatable body and exits into the tank volume via one or more outlet apertures for causing the rotatable body to rotate in the predetermined direction about the axis. The mixer nozzle assembly also includes a governor subassembly for controlling a speed of rotation of the rotatable body in the predetermined direction about the axis and a hydraulic circuit for governing a flow rate of hydraulic fluid directed to the governor subassembly, to adjust the flow rate of the hydraulic fluid for adjusting the speed of rotation of the rotatable body to the preselected speed.

Abstract: The invention relates to a rotary pump (1) including a rotor (3) arranged in a closed pump housing (2) which is in operative connection with a drive (5) for the pumping of a fluid (4), wherein an inlet opening (6) is provided at the pump housing (2) for the intake of the fluid (4) into the pump housing (2) and an outlet opening (7) is provided at the pump housing (2) for conveying the fluid (4) out of the pump housing into a storage container (8) which is at least partially filled with the fluid (4). In accordance with the invention the outlet opening (7) is arranged and designed at the pump housing in such a way that the fluid (4) can be conveyed out of the pump housing (2) through the outlet opening (7) to the storage container (8) directly and free of ducting. The invention further relates to a hydrodynamic mixer (100) with a rotary pump (1) in accordance with the invention and also to the use of the rotary pump (1) and of the hydrodynamic mixer (100) for the processing of a fluid (4).

Abstract: A tank adapted to be used for suspending separation media slurry before transferring the separation media slurry to a column or a container comprises: an impeller (7) adapted to rotate in order to mix the media slurry, a nozzle (9) provided protruding into the tank from the bottom (8) thereof, and an adjustable pipe (5) having an open end (6) positioned in the tank and which can be adjusted in position. The nozzle (9) and the adjustable pipe (5) are adapted to be connected to a pump (3) adapted to pump liquid from the adjustable pipe (5) when the open end (6) of the adjustable pipe (5) has been positioned in an uppermost liquid phase provided in the tank when the media slurry has started to sediment and pump the liquid, possibly containing a small amount of media, through the nozzle (9) back into the tank from the tank bottom (8) in order to start re-suspending media that has sedimented in the tank.

Abstract: The present invention generally relates to the field of pharmaceutical sciences. More specifically, the present invention includes apparatus and devices for the preparation of pharmaceutical formulations containing large diameter synthetic membrane vesicles, such as multivesicular liposomes, methods for preparing such formulations, and the use of specific formulations for therapeutic treatment of subjects in need thereof. Formation and use of the pharmaceutical formulations containing large diameter synthetic membrane vesicles produced by using the apparatus and devices for therapeutic treatment of subjects in need thereof is also contemplated.

Abstract: An improved fluid mixing apparatus is disclosed for the mechanical mixing of fluids or solids-laden slurries contained within a vessel. The invention utilizes a fluid driven turbine to drive a submerged mixing impeller through a speed reducing gearbox. A fluid conducting stator houses one or more turbine blade row(s) that are rotated as a working fluid is pumped through the turbine section by an external pump that circulates fluid at the required flow rate and head. The turbine shaft is rigidly connected to the high speed input shaft of a speed reducing gear box. The low speed output of the gearbox is rigidly attached to submerged mixing impeller(s).

Abstract: A method for manufacturing chemical mechanical polishing pad polishing layers that minimizes entrained gas inclusion defects is provided. Also provided is a mix head assembly for use in the manufacture of chemical mechanical polishing pad polishing layers, wherein inclusions of entrained gas inclusion defects are minimized.

Abstract: The present invention provides a system for treating fly ash and a method of use thereof. The system and method allow for the quick and consistent application of a chemical entity to fly ash so that the characteristics of the fly ash are changed in order to allow use of the fly ash in a new capacity. One specific example is the use of treated fly ash in concrete. The system disclosed herein may be used to treat fly ash as it is produced at a coal-burning power plant or as it is unloaded from a pneumatic truck.

Abstract: A method and apparatus for blending and supplying process materials. The method and apparatus are particularly applicable to the blending of ultra-high purity chemicals, the blending of abrasive slurries with other chemicals for the polishing of semiconductor wafers, and high-accuracy blending of chemicals. The apparatus may include a dispensing subsystem that supplies process materials to a mixing subsystem where they are blended with a static mixer. The method may include supplying process materials with a dispensing subsystem and blending the process materials in a static mixer.

Abstract: The present invention is in the field of cell bioreactors, and specifically in the field of disposable bioreactors.

Abstract: Provided is an apparatus for stabilizing the concentration of a previously generated aerosol, which includes: an aerosol inlet channel; an aerosol pressure adjustment unit accelerating the aerosol; a buffer connected to the aerosol pressure adjustment unit via an aerosol transport channel and having a much larger sectional area than the aerosol inlet channel and the aerosol transport channel, wherein the aerosol accelerated by the aerosol pressure adjustment unit reaches the buffer via the aerosol transport channel and is mixed in the buffer; a feedback channel connecting between the buffer and the preceding channel to the buffer to feedback a portion of the aerosol present in the buffer to the preceding channel to the buffer; and an aerosol outlet channel releasing the aerosol uniformly mixed in the buffer. Provided is also a method for stabilizing the concentration of an aerosol according to the same principle as in the apparatus.

Abstract: A closed single-use system for mixing, storing and homogenizing liquids, comprising an assembly constituted by a rigid container (1) fitted with a non-invasive pump (4), the container (1) enclosing a generally parallelepipedic single-use bag (2), the lower face and the upper face of which are connected in fixed manner by means of a mixing duct (3) which is inserted into the pump (4) and which, during operation, allows the closed-circuit circulation of the liquid in said bag (2), for example from the bottom of the bag to its top, the pump (4) being open so that the mixing duct (3) can be inserted into it and removed from it.

Abstract: A mixing system may include a closed mixer having an inlet, a discharge, and an inlet/discharge. The mixing system may also include a recirculation line in fluid communication with the inlet and the inlet/discharge.

Abstract: A biological reaction apparatus for receiving at least one substrate having a sample located in a sample region, and a separate cover, such that a reaction chamber is formed between the cover and substrate over the sample region, wherein the apparatus includes a locating means to locate the substrate; a cover locating means for locating and moving the cover with respect to the substrate; a fluid dispensing means for dispensing fluid into the reaction chamber; and a draining mechanism; wherein the draining mechanism includes wicking means.

Abstract: An aeration system for circulating an aerating fluid through a chemical composition within a container. The aeration system is closed-loop such that the aeration fluid is supplied by a fluid supply system to the interior of a container to aerate the chemical composition therein. The aeration fluid is returned to the fluid supply system for subsequent redelivery to the container. A filtering mechanism may be employed to remove large particulate matter from the aeration fluid prior to flowing back to the fluid supply system. The aeration process improves the flowability of the chemical composition thus facilitating the transferring and/or discharging of the chemical composition from the container. The aeration process may occur during transport, prior to discharging, and/or during a discharging or transferring operation.

Abstract: A beverage filling method and an apparatus to perform the beverage filling method, wherein a liquid is delivered from a storage tank into a filler tank of a filler, and the liquid is filled into containers by the filler. The method is characterized in that the liquid in the filler tank is returned through return piping attached to the filler tank and refluxed to the storage tank through a reflux path. According to this method, an excess of liquid in the filler can be circulated throughout the entire line.

Abstract: This invention relates to a process and an apparatus for mixing a fluid or a liquid within a vessel or a tank. The invention includes an apparatus with an inlet device and a mixer. The invention mixes crude oils and/or other hydrocarbon materials to a homogenous state with surprising and unexpected high efficiency. The invention includes methods of using the apparatus to mix the contents of the vessel and/or two stratified materials. The invention includes the ability to mix materials having disparities in density and/or viscosity.

Abstract: The invention provides a chemical analysis apparatus which easily agitates and warms up. A chemical analysis apparatus has a motor, a retaining disc which can be rotated by the motor, a plurality of inspection cartridges which are arranged on the retaining disc, a punching machine for punching the inspection cartridges, a warming apparatus and a detection apparatus. The inspection cartridge includes a container formed by a concave portion and a base plate having a flow path. A cover covering the container and the flow path is installed to the base plate. A liquid solution is moved to the container in an outer peripheral side with respect to a rotation axis from the container in an inner peripheral side with respect to the rotation axis via the flow path, by utilizing a centrifugal force generated on the basis of the rotation of the retaining disc.

Abstract: A cement mixing method for mixing cement used in cementing oil wells casing and the mixer used in that method. The mixer employs a straight bulk cement inlet, five annular recirculation jet and five annular water jet orifices located downstream of the recirculation jets so that all of the jets discharge at an angle towards the mixing chamber. The five annular recirculation jets are located in alternating longitudinal alignment within the mixing chamber relative to the five annular water jets. This five jet, intersecting flow design allows for more thorough wetting of the cement powder with a smaller, lighter, less expensive and more durable mixer that is less inclined to foul and easier to clean.

Abstract: The present invention provides an apparatus for forming a chemical mechanical polishing pad, comprising a tank with polymeric materials, a storage silo with microspheres, a isocyanate storage tank with isocyanates and a premix prep tank for forming a pre-mixture of the polymeric materials and the microspheres. The invention further provides a premix run tank for storing the pre-mixture, a mixer for forming a mixture of the pre-mixture and the isocyanates, a closed mold for reaction-injection molding the mixture and a vacuum for degassing at least one of the tank, isocyanate storage tank or the mold.

Abstract: A method for stirring a liquid, comprising: sucking a part of a liquid from a liquid-containing container which opens at the top thereof; and discharging the sucked liquid into the container at a discharging position which is horizontally different from a sucking position where the liquid has been sucked, and an apparatus used for the method.

Abstract: A rotating apparatus (10) for drying a material (44) is disclosed. In one embodiment, the rotating apparatus (10) includes a generally cylindrical drum (12), a burner (20) having a burner head (22) at least partially disposed within the drum (10) and a plurality of elongated flights (26). The flights (26) are spaced-apart at pre-determined locations along an interior surface (16) of the drum (12). The length of the flights extends along the interior surface (16) of the drum (12). Optionally, a plurality of plates (28) may be utilized and positioned between the plurality of flights (26) and the interior surface (16) of the drum (12).

Abstract: The present invention provides an apparatus 20 for forming a striation-reduced chemical mechanical polishing pad 4. The polishing pad 4 comprises a first delivery line 66 for delivering a polymeric material 52 into a mixer 68 and a second delivery line 44 for delivering microspheres 48 into the mixer 68 with the polymeric material 52. The second delivery line 44 is connected to a bulk density control unit 21. The bulk density control unit 21 comprises a storage hopper 22 for storing the microspheres 48. The storage hopper 22 further comprises a porous membrane 24 provided over a plenum 26. A fluidizing gas source 23 is connected to the plenum 26 through a gas inlet line 27. Gas 28 fed into the plenum 26 from the fluidizing gas source 23 permeates through the porous membrane 24 and reduces the initial bulk density of the microspheres 48 in the storage hopper 22.

Abstract: The present invention provides an apparatus for forming a chemical mechanical polishing pad, comprising a tank with polymeric materials, a storage silo with microspheres and a curative storage tank with curing agents. The apparatus further provides a premix prep tank for forming a pre-mixture of the polymeric materials and the microspheres and a recirculation loop in the premix prep tank for recirculating the pre-mixture until a desired bulk density is reached. The apparatus further provides a premix run tank for storing the pre-mixture, a mixer for forming a mixture of the pre-mixture and the curing agents and a mold for molding the mixture.

Abstract: Powdered starting material utilized for molding (e.g., rotational molding, injection molding, blow molding), extrusion, and the like can be preheated to reduce the time required to complete the processing of the material. After being preheated to a temperature below a melting temperature of the powder, the powder is transferred to a processing station. For example, in a rotational molding system, the preheated powder is transferred to a mold, where the preheated powder is melted and the mold is rotated such that the molten material adheres to the walls of the mold. After obtaining a desired distribution of the material over the walls of the mold, the temperature of the mold is decreased as rotation of the mold continues. When the article is sufficiently cooled, the article is removed from the mold.

Abstract: A tank comprising a rounded bottom section with an inlet located at the lowest point of the rounded bottom section having openings to direct fluid against the curved side walls to form a circulation cell. An outlet is provided inside the tank located above and in close proximity to the inlet. The design of the tank, inlet and outlet provide a circulation pattern that can mix, maintain and resuspend fluids and slurries.

Abstract: A process plant comprises a tank (1), an outlet conduit (2), a reservoir of cleaning agent (12), or feedstock(s) of additive(s) (13), a loop conduit (3) for returning liquid into the tank, valve means (9) for controlling admission of liquid into the loop conduit and a pump (4) for driving liquid through the loop conduit. Returning of the liquid takes place through a jetting device (5) adapted for introducing jets of liquid into the body of liquid inside the tank in order to cause stirring to the body of liquid. The jet nozzle is adapted for powered rotation about a first axis and about a second axis perpendicular, or non-perpendicular, to the first axis. The jet nozzles may be embodied in a flat jet rotating around one axis only. Upon emptying the tank, the jetting device may serve for cleaning the tank by spraying liquid onto the tank walls. The invention provides a method for treating liquid as well as a process plant.

Abstract: A process for activating polymer including preconditioning a diluent by heating it to a high temperature and then mixing the heated diluent with the polymer to form a blend having a high polymer content (e.g., about 5% polymer and 95% hot diluent). The blend is activated and then diluted by mixing it with a cold or cool diluent in order to provide an output stream of about 0.25-2% polymer having a relatively low temperature. The high temperature and high polymer content enables a continuous process, as distinguished from batch processes used heretofore which required substantial holding time in an aging tank. The reduction of the temperature of the blend by mixing it with cold or cool diluent prevents damage to heat-sensitive polymers.

Abstract: A low-profile tank and system for mixing dry chemicals with water to form a concentrated hemodialysis solution, the tank having a fluid supply nozzle projecting into a cylindrical side wall of the tank, and a drain connection at an apex of a conical bottom wall of the tank. A cavity having a ramp-like bottom wall extends from the cylindrical side wall of the tank. A venturi eductor provides for transfer of dry chemicals to the tank using compressed air to aspirate the chemicals and deliver them to the tank. A plurality of load cells may be used to measure the weight of the tank and contents. Manual transfer of dry chemicals to the tank is facilitated by the low profile of the tank. A tapered shipping container is provided for nesting when empty.

Abstract: A system for mixing the solid and liquid contents of a tank using at least one discharge flow generating device causing generally inward and outward flow at or near the surface of the tank contents that meet in a predeterminable region. A surface flow generating device is positioned to direct a fluid stream to break up solid contents present in the region.

Abstract: A novel interlocked automatic chemical mixing system and method of use which is particularly well-suited to preparing a final diluted HF (hydrofluoric acid) mixture of desired concentration for the post-cleaning rinsing of semiconductor wafer substrates. The automatic chemical mixing system includes a mixing tank having a normal level sensor and a mixing level sensor above the normal level sensor. A mixing system is provided for thoroughly mixing the liquid precursor components in the mixing tank. In typical application, DI water is introduced into the mixing tank until the DI water reaches the level of the mixing sensor. The precursor aqueous HF is then introduced into the mixing tank until the level of the HF reaches the normal level sensor.

Abstract: An aqueous composition including silica particles with a particle size distribution and particle structure that improve the water retention and exchange characteristics of the aqueous composition is provided. The aqueous silica composition includes silica network particles and water. The silica network particles comprise main particles and bridging particles that form chains between adjacent main particles. The main particles have a particle size greater than the particle size of the bridging particles. Because of the presence of the silica network particles, the aqueous composition is capable of wetting a hydrophobic substrate more than pure liquid water. The silica network particles are generated in water by a method in which an aqueous sodium silicate solution is subjected to vigorous agitation in air, followed by periods of circulation through magnetic fields of alternating direction and further periodic agitation exposed to the air. An apparatus for carrying out the method is provided.

Abstract: A process plant comprises a tank (1), an outlet conduit (2), a reservoir of cleaning agent (12), or feedstock(s) of additive(s) (13), a loop conduit (3) for returning liquid into the tank, valve means (9) for controlling admission of liquid into the loop conduit and a pump (4) for driving liquid through the loop conduit. Returning of the liquid takes place through a jetting device (5) adapted for introducing jets of liquid into the body of liquid inside the tank in order to cause stirring to the body of liquid. The jet nozzle is adapted for powered rotation about a first axis and about a second axis perpendicular, or non-perpendicular, to the first axis. The jet nozzles may be embodied in a flat jet rotating around one axis only. Upon emptying the tank, the jetting device may serve for cleaning the tank by spraying liquid onto the tank walls. The invention provides a method for treating liquid as well as a process plant.

Abstract: A continuous preparation of calcium hydroxide slurry can be made on a mobile apparatus that uses an eductor to initially combine metered flows of calcium oxide and water. The calcium hydroxide slurry is retained in a deaerating sump and then pumped into a serpentine centrifugal mixer so that the reaction of the calcium oxide and the water is safely complete. Because the apparatus allows the calcium hydroxide slurry to be recirculated into the deaerating sump, the slaking process can continue even when it is necessary to pause the discharge of slurry to change transport tankers.

Abstract: A whirlpool reduction cap. The cap for redirecting fluid flow towards an exit port or drain in a vessel comprises a top solid surface area greater than or equal to the area of the exit port, a base connected to the exit port, a side wall positioned between the top surface and the exit port, and an inlet positioned in the side wall, thereby reducing formation of a vortex as a fluid is drained from the vessel.

Abstract: In a process for separating impurities from a raw gallium material containing impurities, a process for refining gallium comprising progressively solidifying a raw gallium material provided in a liquid state inside a vessel while applying stirring, such that the diameter of the tubular solidification boundary gradually advances from the inner wall plane of the vessel towards the center of the vessel to reduce the diameter of the tubular solidification boundary, and separating the liquid phase remaining in the central portion of the vessel from the solidified phase before the entire raw material inside the vessel is solidified. The process above is repeated as required by using, as the raw gallium material, the solidified phase from which the liquid phase is separated. A metallic gallium favorably used for the preparation of a compound semiconductor can be obtained by analyzing the impurity concentration of the impurity-concentrated Ga separated from the solidified layer.

Abstract: A low-profile tank and system for mixing dry chemicals with water to form a concentrated hemodialysis solution, the tank having a fluid supply nozzle projecting into a cylindrical side wall of the tank, and a drain connection at an apex of a conical bottom wall of the tank. A cavity having a ramp-like bottom wall extends from the cylindrical side wall of the tank. A venturi eductor provides for transfer of dry chemicals to the tank using compressed air to aspirate the chemicals and deliver them to the tank. A plurality of load cells may be used to measure the weight of the tank and contents. Manual transfer of dry chemicals to the tank is facilitated by the low profile of the tank. A tapered shipping container is provided for nesting when empty.

Abstract: A hydrodynamic stirring device which dissolves, mixes or puts back into suspension or into a “sol” in a primary liquid phase, a deposited sediment which is contained in a tank and covered by the primary liquid phase. The stirring device includes a suction device, including at least one pumps to remove liquid from the primary liquid phase in the tank, and an injector connected to a discharge side of the suction device. The injector is equipped for reinjecting the liquid into the tank, towards the deposited sediment, in the form of at least one jet having a predefined pressure and flow rate. The injector further includes at least one tube which bears at an end portion thereof, a self-rotating lance. The lance a hollow cylindrical stator which is open at both of its end portions. At a first of its end portions to the injector tube. At a second of its end portions, the stator is connected to a nozzle bearing rotor which is rotatably mounted on the stator.

Abstract: An apparatus 20 for mixing a solute with a solvent is described. The apparatus 20 includes a mixing chamber 12 for a solute and solvent and in which the solute and solvent are moved via a pump 18 and tubes (68a, 68b, 68c and 70). The chamber 12 also contains a divider 80 which, when occupying a first position (“U”), substantially divides the chamber 12 into at least two portions.

Abstract: An apparatus for mixing dissimilar fluids or fluids having different densities is disclosed. A piston shaped for a close fit and slidably mounted within a tubular member divides a material container into a pressurized end and a mixing chamber. A pump is sealably attached to a base plate. The pump communicates with the mixing chamber through an inlet. The outlet bore is directed so that the discharging mixture from the pump causes a turbulent mixing action within the mixing chamber.

Abstract: An apparatus for dosing a granulated or powdered additive in the water of a water works includes a dosing assembly (10) with a water collecting tank (9) hydraulically connected to inflows (20, 21) of unmixed water and to an outflow of additive-mixed water (33) to the works. Unmixed water is tapped through a duct (41) from an inflow and fed to a substantially tubular manifold (18), upwardly connected to tank (19). The additive is delivered into manifold (18), in which the additive mixes with water tapped from the inflow through duct (41) and additive-mixed water discharges into collecting tank (19).

Abstract: A polymer make-down system comprising: a mixing pump; a water source for providing a first quantity of water to piping at a suction end of the mixing pump; and a polymer source for providing a first quantity of polymer to piping at the suction end of the mixing pump; wherein the system is configured such that, after the first quantities of water and polymer have been mixed, a second quantity of water is provided so as to flush the mixture of the first quantities of water and polymer from the system. In another embodiment, the system further comprises a polymer check valve between the polymer source and the suction end of the mixing pump, wherein the polymer check valve is configured to prevent a flow of water to the polymer source. In another embodiment, the system further comprises recirculation piping coupled to piping at a discharge end of the mixing pump and to piping at an outlet end of the polymer check valve, wherein the recirculation piping is configured to be flushed by the second quantity of water.

Abstract: A static mixer for a viscous liquid for use in a chemical mechanical polishing process is provided. The static mixer is constructed of an elongated cylindrical tank, an elongated cylindrical mixing sleeve having a multiplicity of mixing apertures therethrough situated inside the tank, a plurality of curvilinear feed tubes situated at a top of the tank cavity for feeding a mixture of a viscous liquid and a solvent into the tank cavity, a spiral plate mounted on the interior surface of the tank wall extending continuously from a top wall to a bottom wall of the tank cavity, and an outlet tube that is situated at the bottom of the tank cavity inside the mixing sleeve for outputting a mixture.