US3285705A - Contactor with rotor and sector stators - Google Patents

Contactor with rotor and sector stators Download PDF

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Publication number
US3285705A
US3285705A US282251A US28225163A US3285705A US 3285705 A US3285705 A US 3285705A US 282251 A US282251 A US 282251A US 28225163 A US28225163 A US 28225163A US 3285705 A US3285705 A US 3285705A
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United States
Prior art keywords
rotor
sectors
contactor
stators
vessel
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US282251A
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English (en)
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Frederik J Zuiderweg
Stemerding Steven
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Shell USA Inc
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Shell Oil Co
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    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
    • C11B1/00—Production of fats or fatty oils from raw materials
    • C11B1/10—Production of fats or fatty oils from raw materials by extracting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D11/00—Solvent extraction
    • B01D11/04—Solvent extraction of solutions which are liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D11/00—Solvent extraction
    • B01D11/04—Solvent extraction of solutions which are liquid
    • B01D11/0426—Counter-current multistage extraction towers in a vertical or sloping position
    • B01D11/043—Counter-current multistage extraction towers in a vertical or sloping position with stationary contacting elements, sieve plates or loose contacting elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D11/00—Solvent extraction
    • B01D11/04—Solvent extraction of solutions which are liquid
    • B01D11/0426—Counter-current multistage extraction towers in a vertical or sloping position
    • B01D11/0434—Counter-current multistage extraction towers in a vertical or sloping position comprising rotating mechanisms, e.g. mixers, rotational oscillating motion, mixing 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
    • B01F23/453—Mixing liquids with liquids; Emulsifying using flow mixing by moving the liquids in countercurrent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/94—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with rotary cylinders or cones
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/18—Stationary reactors having moving elements inside
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G21/00—Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents
    • 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
    • B01F35/50—Mixing receptacles
    • B01F35/53—Mixing receptacles characterised by the configuration of the interior, e.g. baffles for facilitating the mixing of components
    • B01F35/531—Mixing receptacles characterised by the configuration of the interior, e.g. baffles for facilitating the mixing of components with baffles, plates or bars on the wall or the bottom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049—Controlling or regulating processes
    • B01J2219/00051—Controlling the temperature
    • B01J2219/00074—Controlling the temperature by indirect heating or cooling employing heat exchange fluids
    • B01J2219/00076—Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements inside the reactor
    • B01J2219/00083—Coils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049—Controlling or regulating processes
    • B01J2219/00184—Controlling or regulating processes controlling the weight of reactants in the reactor vessel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00761—Details of the reactor
    • B01J2219/00763—Baffles
    • B01J2219/00765—Baffles attached to the reactor wall
    • B01J2219/00777—Baffles attached to the reactor wall horizontal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/18—Details relating to the spatial orientation of the reactor
    • B01J2219/185—Details relating to the spatial orientation of the reactor vertical

Definitions

  • the invention relates to a contactor for bringing into intimate. contactftwo or more flowable phases that are at least partially immiscible with each other, e.g., immiscible or partially miscible, suitable, for example, for the "extraction of liquid mixtures such as mineral or fatty or essential oils. with the aid of one or more selective solvents, or for carrying out chemical, reactions, such as reactions between olefins and. sulphuric acid.
  • phases to be brought into contact with each other are, as a rule, fluid phases, in particular liquid-liquid or liquid-gas, and. have different specific gravities.
  • One of the phases may also consist of. or contain finely distributed solids.
  • the two phases may flow counter-currently through the contactor or one. phase mayflow through a substantially stationary body of the other phase; in some applications, moreover, the phases may flow'concurrently.
  • stator baffles mounted at vertical intervals within.
  • a vertical cylindrical housing which contains a rotor having circular batliesor discs fixed thereto for rotation at locations midway between the stator baflles.
  • the stator baffles define compartments which intercommunicate only through the openings at the centers of the stator baffles.
  • the contactor vessel is provided with statorswhich are formed by one or by a plurality-of flat. ring sectors, which stators define compartments that are in direct intercommunication in the annular region'occupied; by the sectors, and the rotor which extends through the several compartments issituated in-the central part, i.e.,. centrallywith respect to The said-annular'region.
  • the; rotor sweepszoutr a solid having a surface of revolution, herein called the effective surface, and the diameter of that surface is herein called the effective diameter of the rotor.
  • the rotor may take any of several forms, among which are a substantially smooth cylinder, a cylinder having fixed thereto one or more strips which extend radially outwards, and a cylinder having fixed thereto a plurality of plates.
  • the effective. surface is cylindrical: when the rotor is cylindrical (without any projections) the rotor surface is the same as the effective surface; when one or more, e.g., two to ten, strips, preferably distributed uniformly, are applied, the effective surface is the cylindrical surface swept by said strips; and when plates are provided, the effective surface is that swept out by the radial extremities of the plates, which may be. circular.
  • a rotor having an effective cylindrical surface is simple from the point of view of constructon; one of the reasons for this is that no special attention need be devoted to centering. the rotor with respect to the stators.
  • the stationary ring. sectors are preferably thin plates mounted at vertically spaced positions in planes situated perpendicularly'to the rotor axis, i.e., they are preferably horizontal. At each said position there may be one sector which occupies an are less than about 225 e.g., 180, or a plurality of sectors which together preferably occupy an are less than about 225, e.g., 180, and together form one stator.
  • the sectors are, in 'either arrangement, staggered so that the sector or sectors at each position at least in part overlap the gap or gaps'in adjacent stators.
  • the sectors are semi-annular plates (180 sectors of rings), sectors at successive positions being staggered by 180.
  • the several, e.g., four, sectors are of such. circumferential dimensions that, together, they occupy less than the stated arc, and are preferably equal in size and'distributed uniformly about the circumference; the sectors in adjacent positions are preferably of like size and number and are staggered to lie opposite the gaps between the former sectors.
  • the staggering is. advantageously equal to an angle of 180 dividedby the number of sectors at each position.
  • the space within the housing is divided into compartments by the said stators, the word compartment being herein used to denote the spaces bounded vertically by the said positions, viz.,. by horizontal planes in which the adjacent stators are situated.
  • stator spacing at small housing. diameters, less than 50 cm. is generally 3-5 cm., and at greater diameters, above 50 cm., gene-rally- 5-20 cm.
  • the effective diameter of the rotor. should'preferably be'l'arge in relation to the ring sectors, e.g.,.only about 035- to 2.0% less than the internal diameter of the stationary ring sectors, so that there is only a narrow slit between the rotor and the stator.
  • the effective diameter ofthe rotor is generally between 0.2 and 0.5, preferably not over 0.33 of the housing or shell diameter.
  • the free passage through the stator is preferably at least 45% of the horizontal cross sectional area of the housing, which is of importance for attaining a large throughput.
  • FIGURE 1 is a vertical sectional view through a contactor according to a first embodiment
  • FIGURE 2 is a transverse sectional view taken on the line 2-2 of FIGURE 1;
  • FIGURE 3 is a fragmentary vertical sectional view showing a second embodiment
  • FIGURE 4 is a transverse sectional view taken on the line 4-4 of FIGURE 3, and
  • FIGURE 5 is a fragmentary vertical sectional View showing a third embodiment.
  • the contactor comprises a vertical cylindrical shell 6 forming a housing having vertically spaced inlets 7 and 8, which may be arranged tangentially.
  • the housing has end closures 9 and 10 and may contain, between the inlets and the closures, suitable structures 11 and 12, mounted on supports 13 and 14, for preventing turbulence in the main part of the shell from being transmitted into the end zones adjoining the closures while permitting free flow of fluid through the structures; they may take the form of grids of flat vertical plates to form egg-crate structures.
  • the shell carries a plurality of stationary sectors 15, 15a, which are, in this embodiment, semi-annular.
  • the sectors 15 age staggered 180 in relation to the sectors 15a.
  • a rotor 16 At the E e ntral axis is a rotor 16, in the shape of a cylinder of diameter close to that of the radially inner margins of the sectors 15, 15a, so as to leave only narrow intervening slits 17.
  • the rotor is mounted for rotation by terminal shafts 18 and 19 which extend through the structures 11 and 12 and are rotatable in bearings 20 and 21 carried by the end closures.
  • the shaft 18 extends out through the top closure and is driven by suitable means, such as a pulley 22 and a belt 23, in the direction of the tangential inlets.
  • the lower bearing 21, which is a combined radial and thrust bearing, may, if desired, be lubricated by admitting a small part of the feedstream from the inlet 8 via a branch duct 24. This is desirable when the stream admitted at the bottom is oil, and particularly useful when the contactor contains an aggressive, viz., a corrosive fluid which is flushed out of the bearing by the lubricating stream.
  • the branch stream to the bearing is, naturally, kept as small as possible.
  • the vessel has outlets 26 and 27 communicating with the end zones. Settling occurs in both of these zones, and an interface level is maintained in one of them, e.g., in the upper one as indicated at 28. Suitable means for controlling the feed and/ or discharge rates so as to maintain the interface level are known in the art, e.g., from the above cited US. patent, and are for this reason not described herein.
  • either the heavier or the lighter phase may be dispersed, and this may be controlled by the start-up procedure, as described in the above-cited US. patent.
  • the lighter phase such as lubricating oil
  • the column is initially filled with the other liquid, e.g., a selective solvent such as furfural or phenol, which is admitted through the inlet 7; thereafter both liquids are introduced continuously while the rotor 16 is driven at a speed sufficient to disperse the oil in the solvent and to establish vortex patterns within the compartments.
  • the solvent moves downwards, flowing through successive compartments and through the lower structure 12, below which there exists a quiescent zone in which entrained oil droplets settle upwards; the extract phase (solvent containing extracted, e.g., aromatic compounds in solution) is withdrawn through the outlet 27.
  • the oil is dispersed into droplet-s which move upwards through the compartments and through the upper structure 11, and settle within the quiescent upper end zone to form an oil layer above the interface 28.
  • the extracted oil, from which compounds such as aromatics have been removed, is discharged through the outlet 26.
  • FIGURES 3 and 4 there is shown a part of an embodiment incorporating two features which may be applied individually to the previous embodiment, namely, the use of a plurality of sectors for each stator and the use of strips on the rotor.
  • the cylindrical shell 29 contains a plurality of stators 30, 30a, arranged in alternation and of like construction save for circumferential staggering by angles of 45.
  • the stator 30 comprises four sectors of a ring 31, 32, 33 and 34, each sector having an arc of 45. The sectors are distributed uniformly about the circumference.
  • a rotor which comprises a cylindrical shaft 35 and a plurality, e.g., four vertical strips 36 which project radially outward.
  • the number and radial dimensions of these strips may be varied and are selected so as to provide the desired influence or grip on the liquid.
  • the shaft is mounted for rotation as for the first embodiment.
  • the effective diameter of the rotor is twice the radial distance from the axis of rotation to the outermost part of the strip (of the largest strip when not all are of the same radial dimension).
  • this effective diameter is made only slightly less than the diameters ofinner edges of the sectors, so as to leave only a narrow slit 37, preferably of the size previously stated.
  • the shell .29 is fitted with stators 30 and 30a, as previously described.
  • the rotor comprises a shaft 38, mounted for rotation, and a plurality of plates 39 fixed for rotation with the shaft at the levels of the stators.
  • the plates 39 may have circular outlines, although this is not essential.
  • the effective diameter of the plates (being the same as the actual diameter when they are circular) is only slightly smaller than the diameter of the inner edges of the sectors which constitute the stators.
  • the function of this embodiment 1 s very similar to that of the first, save that the rotor has a reduced diameter in the regions bet-ween stators.
  • the apparatus described attains high contacting efficiency, e.g., when used for solvent extraction or other purposes.
  • This high efliciency can probably be accounted for by the fact that the dispersed phase, as it is transported from one compartment to the next, has a tendency to coalesce against the stators which, in the radial directron, are relatively wide, thus forming larger drops; these are then again dispersed into smaller drops in the next compartment, to which they flow by passage through the open areas adjoining the sectors, in the annular, outer region of the shell.
  • the rate of mass transfer between the phases is higher than when the dispersed phase is merely maintained in the dispersed state.
  • the effectiveness of the present apparatus can be further increased by providing the stators, at the location where the dispersed phase tends to coalesce, with a structure and/or with material which promotes such coalescence. pf course, this should not, at least to any important extent, interfere with the total flow of fluid.
  • Suitable materials promoting coalescence are fibrous materials, such as steel wool and synthetic fibers, such as polypropylene fibers.
  • the coalesence-promoting material is illustrated in FIG- URE 5, wherein layers 40 of fibrous material areapplied to the under surfaces of the stator ring segments and, optional-ly, at the open spaces between the ring sectors, to
  • the contactor may be operated at atmospheric pressure, e.g., for extracting lubricating oils with a normally liquid or a normally solid but molten selective solvent; however, superatmosphe'ric pressure may be used, e.g., in the extraction of kerosene with sulphur dioxide to remove aromatics. Operation under superatmospheric pressure requires the vessel tobe sealed and operation is then facilitated by driving the rotor magnetically or by an electric motor contained within the shell instead of extending the rotor shaft out through the closure.
  • An example of such a construction is described in US. Patent No. 3,013,866, issued December 19, 1961. However, in most instances a direct mechanical drive, as illustrated herein, is preferred.
  • the contactor may also be used to carry out chemical reactions, for instance, the preparation of isopropyl alcohol from propene and sulphuric acid.
  • the precipitating agent e.g., propane
  • the precipitate is discharged at the bottom.
  • Such de-asphalting may be carried out as described by Thegze, Wall, Train and Olney in an article Rotating Disk Contactors Perform Well in Propane De-asphalting of Lube Oil in the Oil and Gas Journal of May 8, 1961, pages 90-94.
  • the heating coils described therein maybe applied to the contactor according to the invention.
  • the apparatus may also be used in processes in which solids occur in one or both of the phases.
  • one or more components can be separated from a liquid mixture by adsorption; the mixture then constitutes one phase and a finely divided adsorbent the other.
  • An example of an application of this type is the separation of benzene from a mixture of C hydrocarbons with the aid of silica gel.
  • the apparatus may be similarly applied.
  • one of the phases consists of a suspension of solids in a liquid. This is the case, for example, when a suspension of polypropylene particles in a hydrocarbon is washed in order to remove, for example, catalyst remnants, hydrochloric acid and/ or alcohols.
  • This suspension can be purified by a countercurrent treatment with water as the washing liquid.
  • the suspension to be purified is introduced at the bottom of the contactor, the washing liquid at the top, and the purified suspension is discharged continuously at the bottom.
  • the contactor can also be used for carrying out a twosolvent extraction.
  • the mixture to be separated is then introduced through an auxiliary inlet 41 (FIGURE 1) at a level between the principal inlets and the two solvents through the inlets 7 and .8, respectively.
  • An example of such an extraction is the treatment of volatile or essential oils with pentane and alcohol.
  • the instant apparatus does not involve a series of successive mixing and settling stages.
  • Example Comparative tests were carried out in three forms of contactors A.
  • semi-annular stators had been installed, each staggered 180 in relation to the next; the width of the stators was 9.5 cm.
  • the distance between two adjacent semiannular stators was 5 cm.
  • a device consisting of a vertically arranged cylindrical housing having an internal diameter of 30 cm, containing a shaft with rotor discs (diameter of the discs 19 cm.), horizontal annular stators (diameter of the opening 21 cm.) being fitted against the inside of the housing midway between the rotor discs; the distance between two adjacent rotor discs was 10 cm.
  • a rotor contactor for contacting at least two flowable phases which comprises:
  • each of said sectors having a sector are of not more than 225, each of said sectors being in positions that are angularly displaced one from another in vertically displaced horizontal sector planes;
  • a contactor as defined in claim 1 wherein said rotor comprises a shaft and at least one longitudinal strip extending radially therefrom and fixed thereto.
  • a contactor as defined in claim 1 wherein said rotor comprises a shaft and a plurality of plates extending radially therefrom at the positions of the said stationary ring sectors and fixed to the shaft to be in planes perpendicular to the rotor axis.
  • a contactor as defined in claim 1 wherein the distance between said vertically spaced positions of the sector i between about 3 and 20 centimeters.
  • a contactor as defined in claim 1 wherein, at each of said vertically spaced positions, there is a plurality of stationary ring sectors which are regularly distributed circumferentially about the rotor and together occupy not more than an arc of about 225, the ring sectors situated in adjacent positions being staggered so that at least parts of the sectors in one of a pair of adjacent positions are opposite the intervals between sectors in the other position of the pair.
  • COIHbIDRtIOHWI'th the contactor defined 1n clalm HARRY B. THORNTON Primary Examinen 1 coalescing means Within at least some of said compartments for coalescing dispersed phase near said stationary 10 RONALD WEAVER RENNER sectors. Assistant Examiners.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Extraction Or Liquid Replacement (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
US282251A 1962-05-30 1963-05-22 Contactor with rotor and sector stators Expired - Lifetime US3285705A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL279113 1962-05-30

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US3285705A true US3285705A (en) 1966-11-15

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US (1) US3285705A (ja)
CH (1) CH421056A (ja)
DE (1) DE1442861A1 (ja)
DK (1) DK125162B (ja)
GB (1) GB1000091A (ja)
NL (3) NL131265C (ja)
SE (1) SE318254B (ja)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3854176A (en) * 1971-09-29 1974-12-17 Atlantic Richfield Co High capacity geometrically-favorable solvent extraction columns for processing fissile materials
US4979987A (en) * 1988-07-19 1990-12-25 First Miss Gold, Inc. Precious metals recovery from refractory carbonate ores
US5330567A (en) * 1988-08-16 1994-07-19 Lenzing Aktiengesellschaft Process and arrangement for preparing a solution of cellulose
US6066759A (en) * 1995-07-12 2000-05-23 Basf Aktiengesellschaft Process and device for preparing (cyclo)aliphatic biuret groups-containing polyisocyanates
US7604783B2 (en) 2004-12-22 2009-10-20 Placer Dome Technical Services Limited Reduction of lime consumption when treating refractor gold ores or concentrates
US8061888B2 (en) 2006-03-17 2011-11-22 Barrick Gold Corporation Autoclave with underflow dividers
US8252254B2 (en) 2006-06-15 2012-08-28 Barrick Gold Corporation Process for reduced alkali consumption in the recovery of silver
EP2347820A4 (en) * 2008-10-21 2015-06-17 Nat Univ Gyeongsang Iacf AGITATOR CONTAINER COMPRISING A SEPARATOR AND AGITATOR WITH ENHANCED BREWING CAPACITY
US10988827B2 (en) 2015-03-16 2021-04-27 3M Innovative Properties Company Coalescing elements in copper production

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8400557A (nl) * 1984-02-22 1985-09-16 Erich Ludwig Leroy Werkwijze en inrichting voor het maken van een schuim met zeer fijne schuimbellen voor stofbestrijding.
GB8928388D0 (en) * 1989-12-15 1990-02-21 Shell Int Research Multistage reactor
EP2283916A1 (en) * 2009-08-04 2011-02-16 Bacterfield International S.A. Mixing device and method for producing a homogeneous and stable suspension

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2601674A (en) * 1948-06-18 1952-06-24 Shell Dev Liquid contact apparatus with rotating disks
US2729544A (en) * 1950-09-13 1956-01-03 Shell Dev Contact apparatus with rotating discs
US2912310A (en) * 1954-02-24 1959-11-10 Shell Dev Rotary contactor
US2941871A (en) * 1955-12-03 1960-06-21 Ruetgerswerke Ag Horizontal counter-current liquid extractor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2601674A (en) * 1948-06-18 1952-06-24 Shell Dev Liquid contact apparatus with rotating disks
US2729544A (en) * 1950-09-13 1956-01-03 Shell Dev Contact apparatus with rotating discs
US2912310A (en) * 1954-02-24 1959-11-10 Shell Dev Rotary contactor
US2941871A (en) * 1955-12-03 1960-06-21 Ruetgerswerke Ag Horizontal counter-current liquid extractor

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3854176A (en) * 1971-09-29 1974-12-17 Atlantic Richfield Co High capacity geometrically-favorable solvent extraction columns for processing fissile materials
US4979987A (en) * 1988-07-19 1990-12-25 First Miss Gold, Inc. Precious metals recovery from refractory carbonate ores
US5330567A (en) * 1988-08-16 1994-07-19 Lenzing Aktiengesellschaft Process and arrangement for preparing a solution of cellulose
US6066759A (en) * 1995-07-12 2000-05-23 Basf Aktiengesellschaft Process and device for preparing (cyclo)aliphatic biuret groups-containing polyisocyanates
US7604783B2 (en) 2004-12-22 2009-10-20 Placer Dome Technical Services Limited Reduction of lime consumption when treating refractor gold ores or concentrates
US8029751B2 (en) 2004-12-22 2011-10-04 Placer Dome Technical Services Limited Reduction of lime consumption when treating refractory gold ores or concentrates
US8061888B2 (en) 2006-03-17 2011-11-22 Barrick Gold Corporation Autoclave with underflow dividers
US8252254B2 (en) 2006-06-15 2012-08-28 Barrick Gold Corporation Process for reduced alkali consumption in the recovery of silver
EP2347820A4 (en) * 2008-10-21 2015-06-17 Nat Univ Gyeongsang Iacf AGITATOR CONTAINER COMPRISING A SEPARATOR AND AGITATOR WITH ENHANCED BREWING CAPACITY
US9205389B2 (en) 2008-10-21 2015-12-08 Industry-Academic Cooperation Foundation Gyeongsang National University Agitating vessel using baffles and agitator having improved agitating capability and including the same
US10988827B2 (en) 2015-03-16 2021-04-27 3M Innovative Properties Company Coalescing elements in copper production

Also Published As

Publication number Publication date
DK125162B (da) 1973-01-08
GB1000091A (en) 1965-08-04
SE318254B (ja) 1969-12-08
NL279113A (ja)
NL131265C (ja)
CH421056A (de) 1966-09-30
DE1442861A1 (de) 1968-12-05
NL279114A (ja)

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