US2963219A - System for continuous operation of series connected hermetically closed centrifugal separators - Google Patents

System for continuous operation of series connected hermetically closed centrifugal separators Download PDF

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US2963219A
US2963219A US654213A US65421357A US2963219A US 2963219 A US2963219 A US 2963219A US 654213 A US654213 A US 654213A US 65421357 A US65421357 A US 65421357A US 2963219 A US2963219 A US 2963219A
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pump
line
valve
oil
pressure
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US654213A
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English (en)
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Palmqvist Fredrik Teod Emanuel
Hoffmann Walter
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Alfa Laval Holdings Amsterdam AB
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Separator AB
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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
    • C11B3/00—Refining fats or fatty oils
    • C11B3/16—Refining fats or fatty oils by mechanical means
    • 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
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B11/00—Feeding, charging, or discharging bowls
    • B04B11/02—Continuous feeding or discharging; Control arrangements therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B5/00—Other centrifuges
    • B04B5/10—Centrifuges combined with other apparatus, e.g. electrostatic separators; Sets or systems of several centrifuges
    • 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
    • C11B3/00—Refining fats or fatty oils
    • C11B3/02—Refining fats or fatty oils by chemical reaction
    • C11B3/06—Refining fats or fatty oils by chemical reaction with bases
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D13/00—Making of soap or soap solutions in general; Apparatus therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2496—Self-proportioning or correlating systems
    • Y10T137/2559—Self-controlled branched flow systems
    • Y10T137/2574—Bypass or relief controlled by main line fluid condition
    • Y10T137/2605—Pressure responsive

Definitions

  • the present invention relates to a system for continuous operation of at least two hermetically closed centrifugal separators which work in series and are controlled independently of each other.
  • a system of the kind stated above may be used in various industries for continuous manufacture of a product, where a component must be separated from one or more other components in separate steps. This is the case, for instance, when refining fatty oils, where the oil first may be degummed, then neutralized with alkali, then decolorized with alkali, and washed with water in order to be freed from its content of soap, and finally bleached and deodorized.
  • Each one of the above operations is normally followed by a separating step.
  • antibiotics for instance penicillin
  • a suitable agent for instance amyl acetate
  • a third important industrial field is soapmaking. Here it is necessary to separate the soap from spent lye after graining and from nigre after fitting. Graining as well as fitting may be effected repeatedly in order to attain a high quality of soap.
  • the principal object of the present invention is to provide a system which overcomes the above-noted difficulties.
  • an outlet of one centrifuge is connected with the inlet of a second centrifuge by a, closed line provided with a pumping means of a capacity which is at least equal to the amount of medium maximally discharging per unit of time from the first centrifuge.
  • a controllable throttle member or valve is provided in an outlet from the second centrifuge; and in the closed line between the centrifuges is provided a device for maintaining constant pressure in a part of the line, preferably between the first centrifuge and the pumping means, as calculated in the fiow direction.
  • the closed line between the separators includes the device or devices in which the various treatments between the separators are to be carried out. These devices are, of course, of a closed design.
  • the controllable throttling member or valve may consist of exchangeable throttle discs; but in a continuously operating plant it is, of course, desirable that the throttling member consist of a throttle valve which is controllable during operation and can be manually or automatically operated.
  • the pumping means employed must have a capacity which is suflicient for a maximum output in the plant, it may in normal operation be allowed to work only with a capacity below the maximum.
  • a positive pump may be used as the pumping means.
  • a pump whose capacity is directly proportional to the number of revolutions of the pump, such as a piston pump, sliding vane pump, screw pump, or gear pump. The two latter types of pump are preferred in the system according to the invention.
  • a pump of a different type for instance, a centrifugal pump
  • the pump may be designed so that there is a certain allowable leakage between the pumping parts, or it may be provided with a return line joining the pressure side of the pump with the suction side of the pump. This counteracts formation of vacuum on the suction side of the pump.
  • a valve such as a spring-loaded valve which opens at a determined pressure difference between the pressure side and suction side of the pump. This makes it possible to ensure that the medium is supplied to the second centrifuge at a certain minimum pressure.
  • the device for maintaining a constant pressure may consist of a valve provided in the return line and which keeps constant pressure on the suction side of the pump. If, however, the pressure in the inlet line of the second centrifuge in this case should be considerably reduced because of some disturbance in the operation, a valve keeping a constant pressure at its inlet side may be provided in the closed line after the positively working pump and its return line. The pressure drop in the second centrifuge is thereby prevented from disturbing the separation process in the first centrifuge.
  • the system should be equipped with a means for keeping a constant supply to the first centrifuge; it being assumed that the pumping means consists of a positively working pump with a return line connecting the pressure side of the pump with the suction side of the pump, and that the means for maintaining av constant pressure consists of a valve provided in the return line and which keeps a constant pressure on the suction side of the pump.
  • the means for keeping constant supply to the first centrifuge comprises a positive pump in the inlet line of the first centrifuge, and a throttle valve between this pump and the centrifuge.
  • a closed line starting from a point of the inlet line between the pump and the throttle valve, connects the pressure side of the pump with the suction side of the pump, and inserted in this closed line is a diaphragm-controlled valve which is designed to keep a constant pressure drop between both sides of the throttle valve.
  • the inner diaphragm chamber of the diaphragm-controlled valve is directly connected, via this closed line, with one side of the throttle valve, while the other side of the throttle valve is connected with the outer diaphragm chamber of the diaphragm-controlled valve via a closed line starting from a point of the inlet line between the throttle valve and the centrifuge.
  • the system of the present invention comprises more than two centrifuges, the above-described arrangement between the centrifuges may recur between the additional successive centrifuges.
  • Fig. 1 is a diagrammatic view of a system for constant supply of fatty oil to a first separator shown in Fig. 2;
  • Fig. 2 is a similar view of this first separator and its closed connection to the next separator;
  • Fig. 3 is a diagrammatic view of a system for making soap, which embodies another form of the invention.
  • Fig. 4 is a similar view of still another form of the invention.
  • Fig. 1 designates a. tank which through a line 2 feeds a positively working pump 3 inserted in the line 2.
  • the tank 1 should contain enough oil to keep the pump 3 entirely fed. This can be effected manually or automatically, in the latter case by means of a filling device (not shown) which feeds the tank 1 and which, in a conventional manner, is controlled by the oil level in the tank.
  • the arrows in the various figures indicate the flow direction of the oil or other medium.
  • the line 2 also contains a heater 4 for raising the oil to the required temperature, and a mixer 5 in which the oil is mixed with a reagent solution (for instance, water or an aqueous solution of phosphoric or other acid) for degumming.
  • a reagent solution for instance, water or an aqueous solution of phosphoric or other acid
  • this reagent solution may be caustic soda or lye, for neutralization of the fatty acids.
  • the water or the aqueous solution is supplied to the mixer 5 through a line 6 by means of a dosage device (not shown) of conventional type which feeds a constant amount per unit of time in spite of varying counterpressure, for instance, a pump of the gear type.
  • a dosage device (not shown) of conventional type which feeds a constant amount per unit of time in spite of varying counterpressure, for instance, a pump of the gear type.
  • a line 7 leads back to the suction or inlet side of the pump-
  • a shunt line 9 contains a safety valve 10. Oil, which occasionally can be let through the safety valve 10, is thus discharged to the suction or low pressure side of the pump 3.
  • the line 2 also contains a throttle valve 11 which in co-operation with the valve 8 is to ensure constant supply to the subsequent separator.
  • the valve 8 contains a diaphragm I2 dividing the upper space of the valve into the outer diaphragm chamber 13 and the inner diaphragm chamber 14, while the lower space of the valve is divided by a partition 15 into an inlet chamber 16 and an outlet chamber 17.
  • a valve opening which is throttled by a valve body 18.
  • a spindle 19 supporting the valve body 18 is connectedto and controlled by the diaphragm 12, which is adapted to be biased by a constant force, in this case a spring 20 adjustable by means of a screw 21.
  • a line 22 starting from the line 2 opens into the outer diaphragm chamber 13 of the valve 8, while the line 7 opens into the inlet chamber 16 of the same valve and via the latter chamber is in unthrottled communication with the inner diaphragm chamber 14.
  • Requisite manometers are shown at 23, 24, and 25, and these may be assumed to indicate the pressures 0.2, 3.5, and 3.0 kg./cm. during normal operation.
  • the amount of oil discharging from the line 2 may be assumed to be 2000 l./h., while the capacity of the pump 3 may be, say, 3000 l./h. Disregarding the liquid supply through the line 6, 2000 l./h. are supplied from the vessel 1, while 1000 l./h. go back through the line 7 to the suction side of the pump 3.
  • the diaphragm 12 is then returned upward until it attains the state of equilibrium again. In this way, a constant pressure drop is always ensured between both sides of the valve 11 and, thus, a constant flow through it.
  • the valve 8 operates in the same manner as described above. The valve 8 will, of course, work in the opposite manner in response to pressure changes of opposite kind.
  • the line 2 opens into a hermetically closed separator 26 where the oil is freed from gums and is discharged through a line 27 in which there is inserted a valve 28 serving to adjust the boundary level (neutral zone) in the separator 26.
  • the gums leave separator 26 through an outlet (not shown) opening into the open atmosphere.
  • the pressure, for instance 1.5 kg./cm. of the discharging oil may be read on a manometer 29.
  • a heater 30, a positively working pump 31 and a mixer 32 In the line 27 are inserted a heater 30, a positively working pump 31 and a mixer 32. Into the latter opens a line 33, through which a reagent such as caustic alkali lye may be supplied by means of a dosage device (not shown) of a kind similar to that which feeds the line 6.
  • a quantity of oil of 2000 l./h. passes from the line 2 into the separator 26 and this oil passes on through the line 27 into another hermetically closed separator 34 which in its oil discharge line 35 has a throttle valve 36.
  • the pressure of the discharging oil may be adjusted to a value suitable for the boundary level in the separator 34, for instance 2.0 kg./cm. which may be read on a manometer 37.
  • the soapstock separated in the separator 34 is discharged through an outlet (not shown) opening into the open atmosphere.
  • the pump 31 is, like the pump 3, assumed to have a capacity of 3000 l./h., and therefore 1000 l./h.
  • a line 40 with a safety valve 41 inserted in it, is branched off from the line 38. Any oil that possibly may be let out through the line 40 is caught by an outlet funnel 42.
  • a diaphragm-controlled valve In the line 38 is inserted a diaphragm-controlled valve.
  • a manometer 44 is inserted on the suction side of the pump 31, where a constant pressure of for instance 0.2 kg./cm. is to be maintained.
  • a pressure increase arising, for example, in the separator 34 propagates through the lines 27 and 38 to the inlet chamber 16 of the valve 43, where it acts through the valve opening and the chambers 17 and 14 to move the diaphragm 12 upward.
  • the valve opening is thus throttled by the valve body 18a so that an increased pressure is built up in the chamber 16.
  • a pressure increase in the separator 34 produces a corresponding pressure increase on the pressure side of the pump 31.
  • the first separator 26 being uninfluenced by these pressure variations, discharges against the constant pressure on the suction side of the pump 31 and thus operates without disturbances from other pressure variations arising in the system.
  • the oil discharging through the line 35 may then be' subjected to further treatment required for obtaining a refined product, the arrangement between the separators 26 and 34 recurring between any additional successive separators.
  • the system shown in Fig. 3 includes a feed line 45 from a saponification step (not shown).
  • the feed line 45 leads into a mixer 46 to which graining electrolyte is supplied through a line 47.
  • the grained soap is supplied by means of a pump 48 to a hermetically closed centrifugal separator 49 in which the neat soap is separated from the spent lye.
  • the neat soap is thereupon discharged through a line 50, which is directly connected hermetically in the usual manner to the rotor of the separator 49, this line 50 containing a valve 51 which keeps constant pressure in the separator outlet proper and which may be a diaphragm-controlled valve of a design similar to the valves 8 and 43 shown in Figs. 1 and 2.
  • a valve 51a of similar construction is also provided in line 50 and serves to keep a constant pressure at the inlet side of valve 51a.
  • a gear pump 52 by means of which the neat soap is conveyed to a mixer 53. Fitting electrolyte is led into this mixer through a line 54.
  • the fitted soap goes from the mixer '53 into another hermetically closed separator 55 from which fitted neat soap discharges through a line 56 having a valve 57 and, if desired, a gear pump or screw pump 58.
  • the valve 57 is to keep constant pressure in the outlet from the separator 55 and may be of the same type as the valve 51.
  • the other separated components from the two separators 49 and 55 are discharged through lines 59 and 60, respectively, directly connected hermetically to the rotors in the respective separators.
  • the lines 59 and 60 have valves 61 and 62, respectively, and pumps 63 and 64, respectively.
  • the valves 61 and 62 are to keep a constant pressure in the respective separator outlets.
  • the nig-re leaving through the line 60 is returned to the mixer 46, where its content of soap is recovered by graining. In each of the outlets from the two centrifugm there is thus maintained a constant counterpressure by means of the valves 51, 57, 61 and 62, whereby the boundary surfaces;
  • the pump 52 is provided with a return line 65 which connects the pressure side of the pump with the suction side of the pump and in this line is inserted a valve 66 which opens only at a determined pressure drop between the pressure and suction sides of the pump.
  • the constant pressure in the line between the centrifuges is maintained primarily on the pressure side of the pump, and the throughfiow preferably is kept constant.
  • the centrifuges here are shown for carbonyl compounds, had been developed with 2,4- dinitro phenyl hydrazine and alcoholic KOH. E is equal to 1 in entirely transparent oil and increases along a logarithmic scale as the degree of transparency is decreased.
  • the two oils were thereupon bleached in vacuum at 120' C. with 2% activated bleaching earth, whereupon peroxide number and carbonyl content were determined for the bleached oils as well as the oxidation stability of these oils.
  • the latter test was eifected by blowing through oxygen gas at C., in which test the increase of the peroxide number after a certain time was determined. The results are shown in the following Table I.
  • a pump 7 which is shown as a centrifugal (nonpositive) pump, although it may be a gear pump with a return line.
  • a valve 72 which may be of the same type as the valve 43 in Fig, 2, is provided to keep constant pressure in the line 70 on the pressure side of the pump 71. In Fig. 4, however, the valve 72 is shown to be actuated by a manometer 73 which, through a suitable operating connection 74, controls an actuator 72a of the diaphragm type for the valve 72 so that the latter throttles the line 76 if the pressure in the inlet to the centrifuge 68 rises, and vice-versa.
  • the pressure on the suction side of the pump 71 will be kept constant, and therefore the centrifuge 67 discharges into the line 70 against a constant pressure.
  • a controllable throttle valve 76 In the outlet 75 from the centrifuge 68 is a controllable throttle valve 76.
  • EXAMPLE 1 An amount of crude rapeseed oil with a content of free fatty acids of 2.3% and a peroxide number of 0.8 mi'lliequivalent/l. was divided into two parts, of which one was continuously refined in a system containing open separators, where the oil is mixed with air in the inlet of the separators and thereupon is thrown out from the bowl into the open separator covers, where the oil is spread like a mist and comes into very intimate contact with air. The other half was continuously refined in a system comprising hermetically closed separators which were hermetically connected together according to the present invention.
  • Both the refining plants were equipped with three separators of which the first was used for neutralization, the second for re-refining, and the third for washing.
  • Each of the plants also comprises a drying section operating under vacuum.
  • the peroxide number for the neutralized, re-refined, washed, and dried oils was determined, stated as milliequivalents peroxide per litre, and so was the carbonyl content which, owing to insufficient knowledge of the molecular weight of the carbonyl compounds present in the oil, was calculated as extinction (E) per gram of oil" in ml. solvent at 460 mu (ultra violet light) in 1- cm. cell, after the red hydrazone colour, specific
  • E extinction
  • the peroxide number and the carbonyl content are both highest for the oil refined in the presence of air.
  • bleaching the peroxide number falls to zero, while the carbonyl content increases, evidently owing to carbonyl compounds being formed when the peroxides are split.
  • the peroxide number of the lye-treated oil gives therefore an indication of how much the oil has been damaged owing to presence of oxygen during the lye-refining operation.
  • the comparative test of the stability of the two oils shows further that the time consumed during oxidation for attaining a certain peroxide number is 20% longer for the oil refined in a closed system than that refined in an open system.
  • EXAMPLE 2 A quantity of rapeseed oil with peroxide number 2.0 milliequivalent/l. was refined in a continuously operating all-hermetic refining system according to the present invention, it being found that the peroxide number for the lye-treated, washed and dried oil was 1.8 milliequivalent/l. Another quantity of the same oil was deaerated in vacuum before refining, and in doing so the oxygen dissolved in the oil was removed almost completely. From the vacuum tank, the deaerated oil was pumped to the all-hermetic system without coming into contact with air. The lye-refined, washed and dried oil had a peroxide number of only 0.4 milliequivalent/L, i.e. considerably lower than for the non-deaerated oil and also lower than for the all-hermetically treated oil mentioned in Example 1, although the peroxide number of crude oil was considerably higher before refining.
  • EXAMPLE 3 A quantity of soyabean oil with a content of free fatty acids of 0.3% and a peroxide number of 2.3 milliequivalent/l. was refined, in one case, in an open system and, in the other case, in an all-hermetic system, which were both of the same kind as described in Example 1.
  • the oils were thereupon bleached in vacuum with 2% bleaching earth at C. and deodorized at 230 C. and 5 mm. Hg.
  • the peroxide number was determined for the lye-treated oils as well as for the bleached and deodorized oils and, further, the oxidation stability and carbonyl content of the bleached and deodorized oils were determined.
  • said pumping means is a positive pump having a return
  • the hermetically closed centrifugal separators used in line connecting the pressure and suction sides of the the new system may be any of the well-known types, pump, said device being a valve located in said return line such as De Laval Air-Tight separators. and operable to maintain constant pressure on the suction Table II Analysis of lye- Analysis of bleached oil Analysis of deodorized oil refined oil Time in Time in Peroxide Peroxide Carbonyl hours for Peroxide Carbonyl hours for number number content attaining number content attaining millimillie. g. at e permillie./g.
  • each separator having an inlet and outlets, an hermeticalsaid pumping means is a positive pump having a return ly closed flow line connecting an outlet of the first sepaline connecting the pressure and suction sides of the pump, rater with the inlet of the second separator, whereby the said device being a valve located in said return line and separators are connected in series, pumping means in operable to maintain constant pressure on the suction said closed line having a capacity at least equal to the side of the pump, the system comprising also means conmaximum discharge rate from said outlet of the first nected to the inlet of the first separator for supplying separator, an adjustable throttle member in an outlet of feed thereto at a constant rate, said last means including the second separator, and a device operatively connected a closed feed line to said last inlet, a positive feed pump to said closed line for maintaining constant pressure in in said feed line, an adjustable throttle valve in said feed a part of said line. line between said feed pump and the first separator, a
  • one said pumping means is a positive pump having a return of said chambers being connected through the last return line connecting the pressure and suction sides of the line to the inlet side of said throttle valve, and a pipe pump. line connecting the other chamber to the feed line at the 5.
  • outlet side of said throttle valve whereby said control the adjustable throttle member is a valve for maintainvalve maintains a constant pressure drop across the inlet ing constant pressure in said outlet of the second sepaand outlet sides of said throttle valve. rator.
  • s id 55 P 1940 pumping means is a positive pump having a return line Lm gren 1941 connecting the pressure and suction sides of the pump, 33 6 gchlosser ig the system comprising also a valve located in said return 2346OO5 Bcott Z line and operable to open in response to a predetermined 2445544 ryson 9 pressure difierence between the pressure and suction sides Trautman July 1948 2,502,349 Sebald Mar.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Microbiology (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Fats And Perfumes (AREA)
  • Centrifugal Separators (AREA)
US654213A 1956-04-26 1957-04-22 System for continuous operation of series connected hermetically closed centrifugal separators Expired - Lifetime US2963219A (en)

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DE (1) DE1407423A1 (enrdf_load_stackoverflow)
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NL (2) NL113586C (enrdf_load_stackoverflow)
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US3117525A (en) * 1961-03-23 1964-01-14 Rosaen Filter Co Vacuum responsive valve
US3125028A (en) * 1964-03-17 rohde
US3148623A (en) * 1960-10-18 1964-09-15 Dowty Rotol Ltd Flow proportioning apparatus for liquids
US3189266A (en) * 1961-05-10 1965-06-15 Separator Ab Centrifugal countercurrent extraction apparatus
US3273790A (en) * 1963-06-12 1966-09-20 Separator Ab Method and apparatus for centrifugal separation of suspensions
US3791575A (en) * 1971-08-30 1974-02-12 Garrett Corp Centrifugal separator discharge control system
US4170328A (en) * 1978-02-02 1979-10-09 Kirk Clair F Desalination by the inverse function of the known (salting-out) effect within an improved centrifuge
US4216195A (en) * 1978-05-19 1980-08-05 Hooker Chemicals & Plastics Corp. Production of chlorine dioxide having low chlorine content
US4886425A (en) * 1987-03-26 1989-12-12 Mitsubishi Jukogyo Kabushiki Kaisha Capacity control device of scroll-type fluid compressor
US5137061A (en) * 1985-12-19 1992-08-11 The Coca-Cola Company Fluid-delivering system
EP1683579A1 (fr) * 2005-01-25 2006-07-26 Jean-Denis Rochat Dispositif jetable pour la séparation en continu par centrifugation d'un liquide physiologique
EP1688183A1 (fr) * 2005-02-03 2006-08-09 Jean-Denis Rochat Procede et dispositif jetable pour la separation par centrifugation d'un liquide physiologique
US20130281280A1 (en) * 2011-07-13 2013-10-24 Technochem International, Inc. Method of Extracting Oil from Thin-stillage
WO2016028214A1 (en) * 2014-08-21 2016-02-25 Anders Göran Hofstedt Method and device for separating two phases
WO2016093765A1 (en) * 2014-12-10 2016-06-16 Anders Göran Hofstedt Method and system for washing of crude tall oil soap

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Publication number Priority date Publication date Assignee Title
EP0560121A3 (en) * 1992-03-09 1994-07-27 Vandemoortele Int Nv Method for refining glyceride oil

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US8070664B2 (en) * 2005-01-25 2011-12-06 Jean-Denis Rochat Disposable device for the continuous centrifugal separation of a physiological fluid
EP1683579A1 (fr) * 2005-01-25 2006-07-26 Jean-Denis Rochat Dispositif jetable pour la séparation en continu par centrifugation d'un liquide physiologique
WO2006079238A1 (fr) * 2005-01-25 2006-08-03 Jean-Denis Rochat Dispositif jetable pour la separation en continu par centrifugation d'un liquide physiologique
US8348823B2 (en) 2005-01-25 2013-01-08 Jean-Denis Rochat Disposable device for the continuous centrifugal separation of a physiological fluid
US20080153686A1 (en) * 2005-01-25 2008-06-26 Jean-Denis Rochat Disposable Device for the Continuous Centrifugal Separation of a Physiological Fluid
EP1688183A1 (fr) * 2005-02-03 2006-08-09 Jean-Denis Rochat Procede et dispositif jetable pour la separation par centrifugation d'un liquide physiologique
WO2006081699A1 (fr) * 2005-02-03 2006-08-10 Jean-Denis Rochat Procede et dispositif jetable pour la separation par centrifugation de sang
US20130281280A1 (en) * 2011-07-13 2013-10-24 Technochem International, Inc. Method of Extracting Oil from Thin-stillage
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US20170246646A1 (en) * 2014-08-21 2017-08-31 Anders Göran Hofstedt Method and device for separating two phases
US10486169B2 (en) * 2014-08-21 2019-11-26 Anders Göran Hofstedt Method and device for separating two phases
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Also Published As

Publication number Publication date
GB815029A (en) 1959-06-17
NL214906A (enrdf_load_stackoverflow) 1900-01-01
SE169181C1 (enrdf_load_stackoverflow) 1959-10-27
DE1407423A1 (de) 1968-12-12
NL113586C (enrdf_load_stackoverflow) 1900-01-01

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