EP0488909B1 - Verfahren zur Regelung des Konditionierens eines Gases und Vorrichtung dazu - Google Patents

Verfahren zur Regelung des Konditionierens eines Gases und Vorrichtung dazu Download PDF

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Publication number
EP0488909B1
EP0488909B1 EP91420413A EP91420413A EP0488909B1 EP 0488909 B1 EP0488909 B1 EP 0488909B1 EP 91420413 A EP91420413 A EP 91420413A EP 91420413 A EP91420413 A EP 91420413A EP 0488909 B1 EP0488909 B1 EP 0488909B1
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Prior art keywords
gas
conditioning
liquid
tubing
temperature
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French (fr)
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EP0488909A1 (de
Inventor
Yves Chave
Jean Marie Serra Tosio
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ASSOCIATION DE GESTION DE L'ECOLE FRANCAISE DE PAPETERIE ET DE L'IMPRIMERIE
Serra Tosio Jean-Marie
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ASSOCIATION DE GESTION DE L'ECOLE FRANCAISE DE PAPETERIE ET DE L'IMPRIMERIE
Serra Tosio Jean-Marie
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/10—Mixing gases with gases
    • B01F23/12—Mixing gases with gases with vaporisation of a liquid

Definitions

  • the invention relates to a method for regulating the conditioning of a gas. It also relates to a device for conditioning a gas implementing this process; it relates more particularly to an adjustable, controllable regulating device, of the vapor concentration and of the temperature of a gas stream.
  • the thermostatically controlled humidifier is constituted by a bubbling chamber partially filled with water at constant level, connected on the one hand by a diffuser to the inlet of gas to be humidified, on the other hand, to a tubing d water supply at constant level, and finally to an outlet for the humidified gas.
  • This solution is perfectly suited to low flow rates, especially for calibrating a probe or a hygrometer.
  • this device cannot be used for packaging large volumes, such as parts, workshops or spraying devices, which require substantial flow rates, since such flow rates are not not compatible with a bubbling humidification system.
  • One of the objects of the invention is to propose a process capable of allowing the humidification or saturation of a gas to be carried out, and generally the conditioning of a gas, for relatively large volumes, by optimizing the saturation process of said gas.
  • a first aspect of the invention is therefore a method for regulating the conditioning of a gas stream according to claim 1.
  • the invention consists in saturating the gas already thermally conditioned with the conditioning liquid also thermally conditioned, and this in a low pressure medium, thereby promoting the evaporation process, and optimizing the saturation phenomenon.
  • the saturation of the gas is self-regulated by the depression itself generated in the low pressure environment.
  • the device according to the invention makes it possible to obtain these results economically and efficiently.
  • the conditioning liquid conveyed at the neck of the venturi duct by the depression created at its level is sprayed into the gas stream already thermally conditioned, this spraying in a low pressure medium also taking place at the temperature gas conditioning system, the saturator being immersed in the thermostatically controlled enclosure.
  • the evaporation process is favored, since following its passage through the venturi neck, where the gas flow speed and consequently the depression created at this level are the most important, the gas certainly undergoes a decrease in its temperature, but this decrease is immediately compensated for by the supply of heat by convection due to the flow of gas along the conditioned walls of the divergent.
  • the vaporization chamber comprises a liquid-gas separation chamber situated above the level of the conditioning liquid, and connected to the outlet pipe.
  • the gas stream is compressed air
  • the humidifying liquid is water
  • the dry air supply pipe is connected by a connection disposed outside of the thermostatically controlled enclosure to a controlled mixing valve, connected to the outlet tubing of the vaporization chamber, said mixing valve being in turn connected to the outlet tubing which passes through the thermostatically controlled enclosure.
  • Figure 1 is a schematic representation of a preferred device of the invention.
  • Figure 2 is a sectional representation of the sealed assembly characteristic of the invention.
  • Figure 3 is a schematic representation of a simplified embodiment of the invention.
  • FIG. 4 shows an execution detail suitable for embodiments requiring high flow rates.
  • the device according to the invention for producing conditioned air with controlled and programmed humidity firstly comprises a source of air, for example compressed air (1) such as a compressor, a bottle, etc., connected by tubing to a valve (2), then to a pressure regulator (3).
  • This regulator (3) is in turn connected to a known hygroscopic desiccator assembly (4), for example of the type called "VAN AIR” marketed by AUXITROL which, in known manner, has a drain (5).
  • This desiccant assembly (4) is in turn connected to a second pressure reducer (6), then to a pressure gauge (7) and to a valve (8), so as to ensure a constant flow of dry air in the manifold. supply (21) (dry compressed air pressure on the valve (8) between six hundred and one thousand KPa).
  • the actual packaging device designated by the general reference (10) comprises a thermostatically controlled enclosure, advantageously insulated, filled with distilled water (12) to a level (13).
  • This enclosure (11) is thermostatically controlled by known means (14) essentially comprising, immersed in water, an electrical resistance (15), an agitator (16) associated with a circulation pump, a thermometer (17) and an apparatus (18) temperature programming display and control, the assembly being controllable from the outside.
  • the dry compressed air opens into the enclosure (11) through an orifice (20), then is connected to a supply pipe (21) forming a coil (22) immersed in this enclosure.
  • This tubing (21) and the coil (22) are connected by a T-shaped connection (23) to two other tubings, respectively a submerged tubing (24), and another non-fully submerged tubing (25), leaving the enclosure. (11).
  • the submerged tubing (24) is connected to the humidifier (30) characteristic of the invention.
  • This characteristic waterproof humidifier (30) detailed in FIG. 2 essentially comprises a pressure-reducing or pressure-reducing conduit with a venturi effect associated with a vaporization chamber (36).
  • the venturi tube is constituted in order by a convergent (31) connected upstream (32) to the dry air supply pipe (24) immersed, then downstream to a neck (33).
  • This neck (33) is associated with a divergent (34) in turn connected by a conical connection (35) to the characteristic cylindrical vaporization chamber (36).
  • the angle at the top of the convergent (31) is close to 21 °
  • the angle at the top of the divergent (34) is close to 6 or 7 ° .
  • the characteristic vaporization chamber (36) has at the bottom (37) an orifice (38) connected by a tube (39) immersed in the enclosure (11) to a water supply means designated by the general reference ( 40) disposed outside of this enclosure (11).
  • This water supply means (40) is thermostatically controlled by a serpentine tube (41), drawing water (12) from the thermostatically controlled enclosure (11).
  • This water supply means (40) disposed outside the enclosure essentially comprises in order an expansion tank and water supply distilled (42), connected to a manual valve (43), then to a tank proper (44), opening onto a valve (45) electro-pneumatically controlled, connected to the immersed tubing (39).
  • the valve (43) is slightly open so as to ensure a certain flow rate of air leakage and therefore maintaining the water (50) in the vaporization chamber (36) at a constant level (51), defined by l orifice (38).
  • the distilled water (50) of the vaporization chamber (36) is connected by a tube (52), first of all to a dust filter (56) intended in particular to avoid the clogging, then to the nozzle arranged in the neck (33) of the venturi.
  • the bottom (53) of this tubing (52) is disposed below the level (51), so that the neck (33) is permanently supplied with distilled water.
  • the upper end (54) of the tubing (52) opens exactly into this neck (33) which, for this purpose, has two opposite through holes (55), arranged horizontally opposite one another in the section even of the neck (33) thus forming a nozzle.
  • venturi induces a depression at the level of the diverging portion (34), which causes the water (50) to be drawn in at the neck (33) and its instantaneous spraying in the form of fine droplets in the diverging portion (34 ), some of which fall back into the chamber (36).
  • the characteristic humidifier (30) is machined in bronze, and is therefore a thermal conductor.
  • it comprises fins (60, 61) intended to facilitate heat exchange with the thermostatically controlled transfer liquid (12).
  • the temperature of the diverging portion (34) and of the vaporization chamber (36) is very close to the temperature of the thermostatically controlled liquid.
  • the vaporization chamber (36) has two horizontal plates (not shown), pierced with through orifices offset from one plate to the other, or two appropriate grids, in order to cause the deposit on these plates or on these grids drops of water carried by saturated air.
  • These plates or grids are advantageously made of a thermal conductive material, thus making it possible to complete the condensation or evaporation of the liquid as the case may be, by increasing the heat exchange surface.
  • these grids play a regulating role, insofar as when water droplets are deposited at the level of said grids, thereby reducing the air flow passing through the grids, they in fact reduce the pressure difference between the neck (33) of the venturi and the vaporization chamber. In this way, the quantity of distilled water drawn in at the level of the neck (33) is reduced, and consequently, the spraying decreases. In fact, a smaller amount of droplets is deposited at the grids, increasing the pressure difference, and therefore the amount of water sprayed at the neck (33). One thus obtains a self-regulation of the saturation, and a permanent mode compared to the imposed set point.
  • the vaporization chamber (36) has, above the constant level of the water (51), an outlet orifice (65), through which the almost saturated air will escape in steam.
  • This outlet port (65) for saturated air is placed just above an annular chamber (66), then is connected by a tube (67) immersed in a controlled mixing valve (70), for example arranged outside of the enclosure (11), and is also connected to the non-submerged dry air supply pipe (25). If it is desired to work at high temperature, it is preferable then that the mixing valve (70) is also immersed in the enclosure (11).
  • a centrifugal-type droplet separator (100) placed in the enclosure (11), is placed between the orifice (65) and the tubing (67). above the orifice (65), and the outlet (101) of saturated gas of which is connected to the tube (80). The separated liquid then returns through the tubing (102) into the liquid (50) through the orifice (103) located below the constant level (51).
  • the mixing valve (70) is advantageously associated with another valve (71), intended to maintain a slight leak to ensure the ascent of the water in the tubing (52).
  • the mixing valve (70) is then connected by a tubing (72) to a submerged coil (73), which is connected by a new tubing (74) to the volume (75) to be conditioned disposed outside the enclosure (11).
  • the gas conditioning device according to the invention operates in the following manner.
  • the compressed air (1) is brought to temperature by passing through the thermostatically controlled enclosure (11). Its forced passage through the venturi (31,33,34) causes the water (50) contained in the vaporization chamber (36) to be sucked in via the pipe (52) and its filter (56). The water which then opens into the neck (33) of this venturi saturates the air which passes through it. This air, after having discharged the heaviest drops of water on the horizontal plates of the vaporization chamber (36), leaves the latter through the orifice (65) and the pipe (67) until reaching the mixing valve (70). This valve (70) is controlled so that the air which escapes therefrom at (72) has a determined hygrometry.
  • this valve (70) corresponds to a stable air humidity. If you want to control the operation more precisely, you can measure the temperature and humidity in the volume to be conditioned (75) and keep the setpoint at 0.1% relative humidity by small pulses on this valve (70).
  • the water sprayed into the neck (33) is partly evaporated in the diverging portion (34) and the chamber (36), and the excess falls back into the tank (37).
  • the heat required for this evaporation is provided by the conductive body of the humidifier (30) provided with exchange fins (60, 61).
  • the separation of the droplets and additional evaporation is obtained by passage through baffles (plates, grids) located in the chamber (36).
  • the saturated air produced (67) is then mixed with dry air (25) in a controllable mixing valve (70) to produce the conditioned air (75).
  • a slight air leak in (43) allows a sweep and the maintenance of the constant water level (51) in the chamber (36)
  • another controlled leak (71) also makes it possible to maintain a slight flow necessary for the spray when relatively dry air is desired. Indeed, this controlled leak (71) allows the ejection of saturated air, and correspondingly prevents defusing the venturi. Finally, it makes it possible to use this device even for very low flow, since the pressure drop is permanently maintained.
  • the air contained in the chamber (36) exerts a pressure greater than the column of water contained respectively in the tubing (39) and in the tank (44).
  • the valve (43) allows a slight flow of air leakage, a reverse water-air flow is established in the duct (39), so that if the water level (51) in the vaporization chamber (36) exceeds that of the high point of the orifice (38), the excess water is discharged into the tank (44).
  • the water level (51) in the chamber (36) is below the high point of the orifice (38)
  • the water descends from the reservoir (44) towards the chamber (36).
  • the water level in the vaporization chamber (36) is regulated by excess or by fault, the regulation precision being fixed by the leakage air flow authorized by the valve (46).
  • the reservoir (44) can be filled in a complementary manner from the expansion tank (42), after the closing of the piloted valve (45) and the opening of the valves (43) and (46).
  • Figure 3 shows as already said a simplified embodiment of the invention.
  • the parts common to Figures 1,2 and 3 have kept the same references.
  • the pressurized air (1) is expanded to a set pressure by passing it through a controlled pressure regulator (6) before the inlet (20) of the thermostatically controlled enclosure (11).
  • the dry air supply tubing (24) is integrally connected to the sealed humidifier (30), and the saturated air outlet port (65) is integrally connected to a tubing (80,67) associated in series to a pressure reducer (81), then to a pressure gauge (82) and a valve (83), and always in series to the submerged coil (73) in turn connected to the volume (75) to be conditioned.
  • the regulator (81) / valve (83) assembly can be replaced by a flow regulator. In this way, by simply varying the flow rate, it is possible to obtain the desired conditioning of the volume (75) of gas of constant concentration in water vapor, directly a function of the pressure and the temperature prevailing in the humidifier (30). .
  • the operation of the installation is particularly stabilized at constant air flow.
  • Variations in the humidity of the outlet air (75) are directly linked to the pressure and temperature in the humidifier (30), and to the temperature and working pressure.
  • This completely reversible form of use can also be used to dehumidify the air for room conditioning, for example, or can be used for compressed gases other than air, and liquids other than water.
  • This solution is particularly advantageous, because it leads to controlled air which can be calculated from known physical laws, since everything passes through the venturi (33). However whatever the humidity required, the flow rate is always constant in the vaporization chamber (36).
  • this device can be used successfully for the conditioning of any volume or any enclosure requiring a hygrometric degree controlled and programmed with precision, such as for example in measuring devices, in particular in laboratories, or in spray guns. spraying, for example of paint, gas and solvent mixtures, etc.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Air Humidification (AREA)
  • Defrosting Systems (AREA)
  • Ventilation (AREA)
  • Treating Waste Gases (AREA)
  • Gas Separation By Absorption (AREA)
  • Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)
  • Central Air Conditioning (AREA)
  • Air Conditioning Control Device (AREA)

Claims (13)

  1. Verfahren zur Regelung des Konditionierens eines Gasstromes, bei dem
    - die Temperatur des Gases auf die gewünschte Konditioniertemperatur gebracht wird,
    - das Gas mittels einer Konditionierflüssigkeit gesättigt wird,
    - und das so erhaltene gesättigte und thermisch konditionierte Gas mit dem nicht-konditionierten ungesättigten Gas in einem von dem gewünschten Konditionieren abhängigen Verhältnis gemischt wird, dadurch gekennzeichnet, daß
    - die Temperatur der Flüssigkeit auf eine nahe bei der Konditioniertemperatur des Gases liegende Temperatur gebracht wird,
    - das Gas durch Zerstäuben der Flüssigkeit in einem Druckabfallkanal mit Venturi-Effekt gesättigt wird, der selbst thermisch konditioniert ist und in folgender Reihenfolge umfaßt:
    - einen sich verengenden Abschnitt, der mit der Rohrleitung für die Zuführung des komprimierten Gases verbunden ist,
    - einen Hals, in den die Konditionierflüssigkeit einmündet,
    - und einen sich aufweitenden Abschnitt, der in eine Verdampfungskammer mündet, die das gesättigte und konditionierte Gas abgibt.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Sättigung des Gases durch die Druckabsenkung selbst geregelt ist, die sich selbst in der Unterdruckatmosphäre ausbildet.
  3. Verfahren nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß zunächst der Druck des Gases beim Eintritt mittels eines Steuergliedes reguliert und das Gas vollständig in den sich verengenden Abschnitt des Venturi-Kanales eingeleitet wird, und daß das gesättigte, aus der Verdampfungskammer ausgelassene Gas bei konstantem Durchsatz auf den Verwendungsdruck entspannt wird, um ein Konditionieren des Gases mit konstanter Konzentration an Kühlflüssigkeitsdampf und in unmittelbarer Abhängigkeit von der Temperatur und dem Druck in dem Sättiger zu erzielen.
  4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das zu konditionierende Gas komprimierte Luft und die Konditionierflüssigkeit Wasser ist.
  5. Vorrichtung zur Regelung des Konditionierens eines Gasstromes, die in einem thermostabilisierten Behälter (11), der dazu vorgesehen ist, eine Flüssigkeit (12) zur Wärmeübertragung aufzunehmen, in einer in diesen Behälter (11) eingetauchten Lage umfaßt:
    . eine mit einer Gasquelle (1) verbundene Zuführung (21, 22) des Gases bei einer bestimmten Temperatur;
    . einen Sättiger (30) für das Gas, um eine Konditionierflüssigkeit (50) mit dem zu konditionierenden Gas (1) in Berührung zu bringen;
    . eine Auslaßrohrleitung (67, 72, 73, 74, 80) für das konditionierte Gas, die die Auslaßöffnung des Sättigers mit dem zu konditionierenden Volumen (75) verbindet,
    dadurch gekennzeichnet, daß der Sättiger (30) einen Druckabfallkanal mit Venturi-Effekt umfaßt, der einer Verdampfungskammer (36) zugeordnet ist, die Mittel zur Beaufschlagung mit der Flüssigkeit (50) auf einen konstanten Flüssigkeitsstand (51) umfaßt, wobei der Venturi-Kanal in folgender Reihenfolge umfaßt:
    - einen sich verengenden Abschnitt (31), der mit einer thermostabilisierten Rohrleitung (24) für die Zuleitung des Gases verbunden ist (32), die die Verlängerung der Zuführung (20, 21) für das komprimierte Gas bildet,
    - einen Hals (33),
    - einen sich aufweitenden Abschnitt (34), der in die Verdampfungskammer (36) mündet,
    wobei die Verdampfungskammer (36)
    . eine Verbindungs-Rohrleitung (52) für die Konditionierflüssigkeit (50) aufweist, die in den Hals (33) des Venturi-Kanales mündet,
    . und eine Auslaßöffnung (65) aufweist, die oberhalb des maximalen für die Konditionierflüssigkeit (50) in der Verdampfungskammer (36) vorgesehenen Flüssigkeitsstandes angeordnet ist.
  6. Vorrichtung zur Regelung des Konditionierens eines Gasstromes nach Anspruch 5, dadurch gekennzeichnet, daß die Verdampfungskammer (36) eine Flüssigkeit-Gas-Trennkammer (66) aufweist, die oberhalb des für die Flüssigkeit (50) vorgesehenen Flüssigkeitsstandes (51) angeordnet ist und mit der Auslaßrohrleitung (67, 72, 73, 74, 80) verbunden ist.
  7. Vorrichtung zum Konditionieren nach einem der Ansprüche 5 oder 6, dadurch gekennzeichnet, daß die Verdampfungskammer (36) ein Mittel (40) für die Beaufschlagung mit der Flüssigkeit auf einen konstanten Flüssigkeitsstand (51) aufweist, das ein Expansionsgefäß (42), ein erstes Ventil (43) mit einer geringfügigen Leckage, eine thermostabilisierte Flüssigkeitsreserve (44) und ein zweites Steuerventil (45) umfaßt, wobei diese thermostabilisierte Einheit, die außerhalb des oder in dem Behälter (11) angeordnet ist, mit einer Rohrleitung (39) verbunden ist, die durch den Behälter (11) verläuft und mit einer Öffnung (38) verbunden ist, die in die Verdampfungskammer (36) in Höhe des konstanten Flüssigkeitsstandes (51) mündet.
  8. Vorrichtung zum Konditionieren nach einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, daß das äußere Ende der Rohrleitung (52), die über einen zwischengeschalteten Filter (56) die Verdampfungskammer (36) mit dem Hals (33) des Venturi-Kanales verbindet, zwei durchgehende Öffnungen (55) aufweist, die einander gegenüberliegend und horizontal in dem Abschnitt des Halses (33) angeordnet sind.
  9. Vorrichtung zum Konditionieren nach einem der Ansprüche 5 bis 8, dadurch gekennzeichnet, daß die Verdampfungskammer (36) mit konstantem Flüssigkeitsstand (51) eine Folge von aus einem wärmeleitenden Material bestehenden Gittern oder horizontalen Platten aufweist, die mit der Kammer eine Einheit bilden, wobei die Gitter oder Platten eine Vielzahl von Öffnungen aufweisen, die von einer Platte zur anderen gegenseitig versetzt sind und dazu vorgesehen sind, die Kondenströpfchen der Konditionierflüssigkeit aufzufangen und mithin den Wärmeaustausch zwischen dem gesättigten Gas und der Verdampfungskammer zu fördern.
  10. Vorrichtung zum Konditionieren nach einem der Ansprüche 5 bis 9, dadurch gekennzeichnet, daß die Auslaßöffnung (65) der Verdampfungskammer (36) mit einem in der Art einer Zentrifuge ausgebildeten Tröpfchenabscheider (100) verbunden ist, der in dem Behälter (11) oberhalb der Auslaßöffnung (65) angeordnet ist, und dessen Auslaß (101) des gesättigten Gases mit der Auslaßrohrleitung (80) verbunden ist, wobei der Auslaß der abgeschiedenen Flüssigkeit durch eine Rohrleitung (102) mit der Flüssigkeitsreserve (50) durch eine Öffnung (103) verbunden ist, die sich unterhalb des für die Flüssigkeit vorgesehenen Flüssigkeitsstandes (51) befindet.
  11. Vorrichtung zum Konditionieren nach einem der Ansprüche 5 bis 10, dadurch gekennzeichnet, daß die Rohrleitung (22) für die Zuführung des trockenen Gases mittels einer Verzweigung (23) an eine zweite Rohrleitung (25) angeschlossen ist, die durch ein Steuermischventil (70) mit der Auslaßrohrleitung (67) des gesättigten Gases der Verdampfungskammer (36) verbunden ist, wobei das Mischventil (70) seinerseits seriell mit einer thermostabilisierten Rohrleitung (73) verbunden ist, die mit der Auslaßrohrleitung (74) verbunden ist.
  12. Vorrichtung zum Konditionieren nach einem der Ansprüche 5 oder 11, dadurch gekennzeichnet, daß die Quelle für die komprimierte Luft (1) mit der Zuführungsrohrleitung (21) seriell mit einem Reduzierventil (3), einem Trockenmittel (4) und einem zweiten Reduzierventil (6) verbunden ist, um die Rohrleitung (21) mit trockener Luft bei konstantem Durchsatz zu beaufschlagen.
  13. Vorrichtung zum Konditionieren nach Anspruch 11, die automatisiert ist, mit:
    - einer Meßapparatur für die Temperatur und die Dampfkonzentration des konditionierten Gases (75);
    - einem Mikroprozessorsystem, das mit einer Multifunktionskarte für numerische/analoge Eingaben/ Ausgaben ausgerüstet ist;
    - einem spezifischen Kontroll- und Steuerprogramm für die Steuerelemente (2, 6, 8, 14, 45, 70), das die programmierten Stellwerte der Temperatur und der Dampfkonzentration verwaltet.
EP91420413A 1990-11-27 1991-11-22 Verfahren zur Regelung des Konditionierens eines Gases und Vorrichtung dazu Expired - Lifetime EP0488909B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9015134A FR2669555B1 (fr) 1990-11-27 1990-11-27 Dispositif de conditionnement de gaz.
FR9015134 1990-11-27

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EP0488909A1 EP0488909A1 (de) 1992-06-03
EP0488909B1 true EP0488909B1 (de) 1995-08-02

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US (1) US5249740A (de)
EP (1) EP0488909B1 (de)
JP (1) JPH04288418A (de)
AT (1) ATE125728T1 (de)
CA (1) CA2054800A1 (de)
DE (1) DE69111762T2 (de)
FR (1) FR2669555B1 (de)

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NL9200415A (nl) * 1992-03-06 1993-10-01 Bronkhorst High Tech Bv Werkwijze voor het omzetten van een vloeistofstroom in een gasstroom, en inrichting voor het uitvoeren van de werkwijze.
FR2746308B1 (fr) * 1996-03-22 1998-04-30 Oreal Compositions de teinture des fibres keratiniques contenant des imidazolo-azoles ; leur utilisation en teinture comme coupleurs ; procede de teinture
FR2746309B1 (fr) 1996-03-22 1998-04-17 Oreal Composition de teinture des fibres keratiniques contenant des pyrazolopyrimidineoxo ; leur utilisation pour la teinture comme coupleurs, procedes de teinture
FR2746310B1 (fr) 1996-03-22 1998-06-12 Oreal Compositions de teinture des fibres keratiniques contenant des pyrazolin-3,5-dione ; leur utilisation pour la teinture comme coupleurs, procede de teinture
FR2746391B1 (fr) 1996-03-22 1998-04-17 Oreal Compositions cosmetiques a base de pyrazolin-4,5-diones, nouvelles pyrazolin-4,5 diones, procedes de preparation et utilisations
FR2746306B1 (fr) 1996-03-22 1998-04-30 Oreal Compositions de teinture des fibres keratiniques contenant des pyrazolo-azoles ; leur utilisation pour la teinture comme coupleurs, procede de teinture
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Publication number Publication date
FR2669555B1 (fr) 1993-07-23
ATE125728T1 (de) 1995-08-15
DE69111762T2 (de) 1996-02-08
FR2669555A1 (fr) 1992-05-29
JPH04288418A (ja) 1992-10-13
DE69111762D1 (de) 1995-09-07
EP0488909A1 (de) 1992-06-03
US5249740A (en) 1993-10-05
CA2054800A1 (fr) 1992-05-28

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