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EP0166655B1 - Verfahren und Vorrichtung zur Kühlung eines Pulvers mittels eines Kältefluidums - Google Patents

Verfahren und Vorrichtung zur Kühlung eines Pulvers mittels eines Kältefluidums Download PDF

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Publication number
EP0166655B1
EP0166655B1 EP85401219A EP85401219A EP0166655B1 EP 0166655 B1 EP0166655 B1 EP 0166655B1 EP 85401219 A EP85401219 A EP 85401219A EP 85401219 A EP85401219 A EP 85401219A EP 0166655 B1 EP0166655 B1 EP 0166655B1
Authority
EP
European Patent Office
Prior art keywords
powder
hopper
refrigerant fluid
towards
tubular framework
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP85401219A
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English (en)
French (fr)
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EP0166655A1 (de
Inventor
Gérard Dubrulle
Alain Roullet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Priority to AT85401219T priority Critical patent/ATE34040T1/de
Publication of EP0166655A1 publication Critical patent/EP0166655A1/de
Application granted granted Critical
Publication of EP0166655B1 publication Critical patent/EP0166655B1/de
Expired legal-status Critical Current

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Classifications

    • 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
    • C11D13/12—Cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
    • F28C3/00—Other direct-contact heat-exchange apparatus
    • F28C3/10—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material
    • F28C3/12—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material the heat-exchange medium being a particulate material and a gas, vapour, or liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
    • F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air

Definitions

  • the present invention relates to a method and an installation for cooling, by means of a refrigerant, a powder and in particular a detergent powder.
  • washing powder In the powder manufacturing industries, it is necessary to cool them for various reasons relating both to the particular constitution of the powders and to the requirements posed by the packaging operations. This is for example the case of so-called “economical” washing powders, which work at low temperature (30 to 60 ° C) instead of boiling and to which are added washing agents, surfactants or other specific additives which cannot withstand high conditioning temperatures.
  • washing powder is produced continuously, at tonnages ranging from 10 to 50 tonnes / h, on a single installation.
  • the raw materials (liquids and solids), after having been mixed and then dried (for example with hot air), are transported, by means of conveyor belts, in the form of a powder having an average particle size of 500 microns.
  • the powder then arrives at the bottom of a vertical or slightly inclined cylinder, while still being at a temperature of 70 to 90 ° C.
  • the powder is then sucked upwards, into this cylinder, with colder ambient air and it arrives at a point located 10 to 40 meters higher, point where it separates from the air by gravity.
  • the powder then falls into one or more receiving hoppers from where it is taken up to receive the specific additives, before being sent to the packaging workshop.
  • the desired temperature in the detergent hopper is about 25 to 40 ° C.
  • the cooling of the powder produced by heat exchange with this sucked air-turns out to be insufficient It was therefore necessary to implement additional cooling methods to allow the desired temperature to be reached in the receiving hopper.
  • a refrigerating group which cools either the powder alone (by means of a solid / liquid exchanger for example) or the air alone, or again at the same time air and powder.
  • This process has the disadvantage of having a low yield, of being very expensive, unreliable and of not being flexible.
  • liquid nitrogen spraying device can consist of a simple torus pierced with holes directed upwards or by a ramp of liquid nitrogen inlet tubes oriented upwards.
  • the exchange of frigories with the air and the powder sucked up is relatively homogeneous because of the Reynolds number and the height of the lift cylinder with air flow.
  • US patent 4222527 describes a cryo-grinding process in which a particulate product to be ground is first cooled in a cylindrical hopper using liquid nitrogen. This is sent by a cane pierced with openings facing upwards and placed at the base of the hopper. The product thus precooled is then ground under injection of liquid nitrogen, at low temperature.
  • the present invention aims to remedy these drawbacks by providing a method and an installation of remarkably simple design, of very easy implementation, making it possible to obtain selective cooling of the powder alone with a variable refrigerating contribution, and this, in the best security conditions.
  • this method of cooling a powder in which the powder is poured into a hopper through its upper opening, then cooled inside said hopper before being discharged through a lower opening thereof, this powder forming a mass of predetermined height inside said hopper, the powder being cooled using a refrigerant under pressure in the liquefied state, is characterized in that the fluid is injected in the form of elementary jets in the powder mass using a tubular frame provided with orifices, in particular slots, oriented towards the bottom of the hopper through which said jets exit, pointing towards the axis of the hopper, and in this that said tubular frame is placed in the hopper at a height, from the lower opening of the hopper, which is between half and a third of the height of the mass of powder.
  • the invention also relates to an installation for cooling, by means of a refrigerant, a powder, in particular a detergent powder comprising a hopper containing said powder, in which the powder falls in the hopper before its distribution towards a post located downstream, comprising, in the powder reception hopper, a device for injecting a liquefied refrigerant, connected to a reservoir of this pressurized fluid, said injection device consisting of a tubular frame of polygonal or circular shape in plan, extending horizontally across the hopper, pierced with orifices, in particular with slots, regularly distributed in the lower part of the wall of said tubular frame, each of these orifices allowing an elementary jet of refrigerant to escape directed downward and towards the vertical axis of the hopper, that is to say towards the zone where the pressure of the powder is the highest, the section and the number of these orifices depending on the desired refrigerant flow, the tubular frame ensuring the injection being placed at a distance from the bottom of the receiving hopper,
  • the installation also includes a regulation assembly comprising a temperature sensor for reading the temperature of the powder at the outlet of the hopper, and means for controlling the flow of the refrigerant towards the injection device, depending on the powder temperature recorded by the sensor.
  • the method and the installation according to the invention make it possible to cool the powder in the hopper without modifying its physicochemical characteristics and its particle size, whatever the flow rate of the powder at the outlet of the hopper.
  • the refrigerant used in the process and the installation according to the invention is chosen so as to be inert with respect to the powder and it can preferably be constituted by liquid nitrogen.
  • the method according to the invention offers the advantage of making it possible to achieve a very significant saving in liquid nitrogen. Furthermore, this process has a great flexibility of implementation because the flow rate of liquid nitrogen can be easily adapted to the conditions of production and in particular to the flow rate of the cooled powder at the outlet of the hopper.
  • the method according to the invention also makes it possible to make an additional saving on the heating energy of the air evacuated at the top of the lifting cylinder with air flow, with a view to using this air for drying, given that the air used for entraining the powder in the lifting cylinder is not cooled.
  • the process does not require the obligation to install an oxygen detection because the cooling is not carried out in the workshops.
  • the injection of the cryogenic fluid within the powder stored in the receiving hopper causes an inerting effect with respect to this powder, while in the conventional process the nitrogen gas is entrained outside with the air.
  • the cooling installation shown in FIG. 1 is intended to cool a mass of powder 1 contained in a reception hopper 2.
  • This reception hopper 2 of frustoconical or pyramidal shape, is located below the upper end of a vertical or slightly inclined lifting cylinder 3, into which the powder is aspirated with ambient air.
  • the powder separates from the air flow and falls into the hopper 2, as indicated by the arrow in solid line f, while the air continues to flow. outward movement, as indicated by the arrow f1 in dashes.
  • the powder is first of all precooled by the suction air (system called “air-lift” " ).
  • the receiving hopper 2 there is a dosing extractor device 4, for example of the rotary valve type, which ensures the distribution, on a conveyor belt, of an appropriate flow of powder 1 cooled to a determined temperature.
  • the cooling of the powder 1 is carried out within the powder itself, while it is contained in the receiving hopper 2, and this by means of a device for injecting a cryogenic fluid.
  • a cryogenic fluid for example liquid nitrogen.
  • This injection device 5 is advantageously constituted by a tubular frame of polygonal or circular shape in plan, extending horizontally across the hopper 2 and which is connected, externally, to a source of liquid nitrogen.
  • the shape of the tubular frame is adapted to the section of the hopper so as to be at a distance from the edges of the hopper sufficient to prevent liquid nitrogen from coming into contact with its walls before vaporization.
  • a sectional view fig.
  • the surface B between the edges of the hopper and the tubular frame is substantially equal to the surface A located inside the frame.
  • This tubular frame 5 is pierced with orifices, in particular with slots 6, regularly distributed over its wall.
  • the section and the number of these slots 6 depend on the desired flow rate of liquid nitrogen.
  • These slots generally have a section equal to about half that of the frame, with symmetry in the cutting plane (fig. 3) so as to inject the same amount of nitrogen towards surfaces A and B. (height D / 2 of a slot for a height D of the frame).
  • Liquid nitrogen is injected under pressure in order to be able to penetrate the powder.
  • the slots 6 are preferably formed in the lower part the inner wall of the tubular frame 5 so that each of these slots 6 lets out an elementary jet of liquid nitrogen directed downwards and towards the vertical axis of the hopper, that is to say towards the zone where the powder pressure is highest.
  • the tubular frame 5 ensuring the injection of liquid nitrogen must be at a height, starting from the bottom of the receiving hopper 2, which is between half and a third of the height of the mass of powder. 1.
  • the device 5 for injecting liquid nitrogen into the powder mass 1 makes it possible to obtain the desired liquid nitrogen flow rates, while avoiding the "filling or rising of cold liquid or gaseous nitrogen in cracks which are created. in the powder mass 1.
  • the injection device 5 must also be designed to allow good homogeneity of the distribution of the frigories provided, while not clogging, that is to say it must not be blocked by icing due to the 10 to 15% humidity of the powder 1 or by the powder itself.
  • the injection device 5 is connected, by means of an isolated cryogenic line 7, to a tank (or evaporator) of liquid nitrogen 8 under pressure, due to the height at which the injection is to be carried out liquid nitrogen in the powder 1.
  • the cooling installation according to the invention also comprises a set for regulating the flow rate of liquid nitrogen injected into the powder 1.
  • This set includes a regulator proper 9 which is connected to a temperature probe 10 engaged in the part lower of the hopper 2, to continuously measure the temperature of the powder 1 at the outlet of this hopper.
  • This regulator in turn acts on one or more valves connected to the cryogenic line 7.
  • the regulator 9 controls two valves 11 and 12 connected in parallel.
  • the cooling is carried out, by direct injection of liquid nitrogen, in a place where only the powder 1 is present, the temperature of this powder having already been lowered beforehand as a result of its passage through the air-flow lifting cylinder 3.
  • This direct injection of liquid nitrogen, via the injection device 5, within the powder mass 1 allows regulation of the cooling power over a very wide range.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Detergent Compositions (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Claims (9)

1. Verfahren zum Kühlen eines Pulvers (1), bei welchem das Pulver in einen Trichter (2) durch seine obere Öffnung geschüttet wird, dann im Inneren dieses Trichters gekühlt wird, bevor es durch eine untere Öffnung desselben abgezogen wird, wobei dieses Pulver eine Masse einer vorbestimmten Höhe im Inneren dieses Trichters bildet und mit Hilfe eines Kühlfluids unter Druck in verflüssigtem Zustand gekühlt wird, dadurch gekennzeichnet, daß das Fluid in der Form von Grundstrahlen in die Pulvermass mit Hilfe eines rohrförmigen Rahmens (5) eingespritzt wird, der mit Öffnungen, insbesondere mit Schlitzen (6) versehen ist, die zum unteren Teil des Trichters ausgerichtet sind, durch welche diese Strahlen austreten und sich zur Trichterachse hinrichten, und daß man diesen rohrförmigen Rahmen im Trichter auf einer Höhe, ausgehend von der unteren Öffnung des Trichters, anordnet, die zwischen der Mitte und dem Drittel der Höhe der Pulvermasse verstanden wird.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Ränder des rohrförmigen Rahmens unter einem Abstand der Wände des Trichters angeordnet sind, der ausreicht, um zu vermeiden, daß der flüssige Stickstoff mit diesen vor der Verdampfung in Kontakt tritt.
3. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß man als verflüssigtes Kühlfluid ein bezüglich dem Pulver inertes Fluid und vorzugsweise flüssigen Stickstoff verwendet.
4. Anlage zum Kühlen eines Pulvers (1) mittels eines Kühlfluids, insbesondere eines Detergenspulvers, mit einem das Pulver enthaltenden Trichter (2), bei welcher das Pulver vor seiner Verteilung in Richtung auf eine abstromig angeordnete Stelle in den Trichter fällt, wobei die Anlage in dem Aufnahmetrichter (2) für das Pulver (1) eine Einspritzvorrichtung (5) für ein verflüssig- tes Kältefluid aufweist, die mit einem Behälter (8) für dieses Fluid unter Druck verbunden ist, dadurch gekennzeichnet, daß die Einspritzvorrichtung (5) durch einen rohrförmigen Rahmen polygonaler Form oder Kreisform im Querschnitt gebildet ist, der sich horizontal quer über den Trichter (2) erstreckt, mit Öffnungen durchbohrt ist, insbesondere Schlitzen (6), die gleichmäßig im unteren Teil der Wand des rohrförmigen Rahmens (5) verteilt sind, wobei jede dieser Öffnungen ein Entweichen eines Grundstrahls des Kältefluids erlaubt, welches zum unteren Teil und zur vertikalen Achse des Trichters gerichtet ist, d.h. zu einer Zone, wo der Pulverdruck am höchsten ist, wobei der Querschnitt und die Anzahl dieser Öffnungen vom Durchsatz des gewünschten Kältefluids abhängt und der rohrförmige Rahmen (5), welcher das Einspritzen sicherstellt, in einem Abstand vom unteren Teil des Aufnahmetrichters (2) angeordnet ist, der zwischen der Hälfte und dem Drittel der Höhe der Pulvermasse (1) im Trichter verstanden wird.
5. Anlage nach Anspruch 4, dadurch gekennzeichnet, daß sie auch einem Regulieraufbau aufweist, der einen Temperaturmeßgeber (10) für das Anheben der Temperatur des Pulvers (1) am Ausgang des Trichters (2) sowie Steuermittel (9, 11, 12) aufweist für den Durchsatz des Kältefluids in Richtung der Einspritzvorrichtung in Funktion der Temperatur des Pulvers (1), welche durch den Meßgeber (10) angehoben ist.
6. Anlage nach Anspruch 5, dadurch gekennzeichnet, daß die Steuermittel für den Durchsatz des Kältefluids eine Reguliereinrichtung (9) aufweisen, welche auf zwei parallel geschaltete Ventile (11, 12) wirkt.
7. Anlage nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, daß der Trichter (2) mit Mitteln zum Ansaugen des Pulvers versehen ist, welche das Pulver vom unteren zum oberen Teil des Trichters durch Luftzug ansaugen, wodurch zuvor eine Kühlung dieses Pulvers erzeugt wird.
8. Anlage nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Geometrie des rohrförmigen Rahmens (5) Bezüglich der dem Trichter (2) entsprechenden Ränder so ist, daß die Oberfläche (B) zwischen den Rändern des Trichters (2) und dem rohrförmigen Rahmen (5) im wesentlichen gleich der Oberfläch (A) ist, die im Inneren dieses Rahmens (5) angeordnet ist.
9. Anlage nach Anspruch 8, dadurch gekennzeichnet, daß die Öffnungen des rohrförmigen Rahmens (5) einen Querschnitt haben, welcher das Einspritzen derselben Menge an Stickstoff zu den Oberflächen (A) und (B) erlaubt.
EP85401219A 1984-06-22 1985-06-19 Verfahren und Vorrichtung zur Kühlung eines Pulvers mittels eines Kältefluidums Expired EP0166655B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85401219T ATE34040T1 (de) 1984-06-22 1985-06-19 Verfahren und vorrichtung zur kuehlung eines pulvers mittels eines kaeltefluidums.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8409810 1984-06-22
FR8409810A FR2566515B1 (fr) 1984-06-22 1984-06-22 Procede et installation de refroidissement, au moyen d'un fluide frigorigene d'une poudre

Publications (2)

Publication Number Publication Date
EP0166655A1 EP0166655A1 (de) 1986-01-02
EP0166655B1 true EP0166655B1 (de) 1988-05-04

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ID=9305308

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85401219A Expired EP0166655B1 (de) 1984-06-22 1985-06-19 Verfahren und Vorrichtung zur Kühlung eines Pulvers mittels eines Kältefluidums

Country Status (12)

Country Link
US (1) US4619113A (de)
EP (1) EP0166655B1 (de)
JP (1) JPS6117880A (de)
KR (1) KR860000367A (de)
AT (1) ATE34040T1 (de)
AU (1) AU573850B2 (de)
BR (1) BR8502986A (de)
CA (1) CA1272038A (de)
DE (1) DE3562527D1 (de)
ES (2) ES8606620A1 (de)
FR (1) FR2566515B1 (de)
ZA (1) ZA854709B (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2713321B1 (fr) * 1993-12-06 1996-01-12 Air Liquide Appareillage pour refroidir une masse de matière liquide, ou éventuellement pulvérulente.
GB2291885A (en) * 1994-07-29 1996-02-07 Procter & Gamble Comminuting detergent compositions
DE19717006A1 (de) * 1997-04-23 1998-10-29 Daimler Benz Ag Verfahren zur Kühlung von stückigem oder körnigem Gut sowie Vorrichtung zur Durchführung des Verfahrens
FR2764366B1 (fr) 1997-06-10 1999-07-16 Air Liquide Procede et installation de refroidissement du contenu d'une enceinte
FR2782153B1 (fr) 1998-08-05 2000-12-01 Air Liquide Dispositif et procede d'injection d'un fluide frigorigene dans un appareil melangeur de produits
DE10132072C1 (de) * 2001-07-05 2002-10-10 Gerhard Auer Verfahren und Vorrichtung zur direkten Kühlung von Pigmenten nach einer Dampfstrahlmahlung
DE50208268D1 (de) 2001-07-05 2006-11-09 Kerr Mcgee Pigments Internat G Verfahren zur direkten kühlung von feinteiligen feststoffen
FR2892270B1 (fr) * 2005-10-26 2008-02-01 Gervais Danone Sa Puree de fruits ou de legumes microfoisonnee et son procede de preparation
FR2924491B1 (fr) 2007-12-04 2009-12-18 Valeo Systemes Thermiques Intercalaire ondule muni de persiennes pour echangeur de chaleur
FR2949647B1 (fr) * 2009-09-10 2011-10-21 Air Liquide Procede et installation de refroidissement du contenu d'une enceinte mettant en oeuvre un systeme de convection forcee dans la partie haute de l'enceinte
CN110831691A (zh) 2017-07-07 2020-02-21 林德股份公司 低温lco2面粉冷却系统

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US2648206A (en) * 1950-03-11 1953-08-11 J Sparks Van Method and apparatus for cooling aggregates
US2919862A (en) * 1953-08-31 1960-01-05 Knapsack Ag Process and apparatus for comminuting solid viscous substances, with a liquefied gas as a precooling agent
US3150496A (en) * 1958-06-24 1964-09-29 John R Hightower Cooling concrete ingredients
US3036440A (en) * 1960-02-03 1962-05-29 United States Steel Corp Method of cooling briquettes of iron particles
US3410065A (en) * 1966-04-12 1968-11-12 John L. Martin Harvester for alfalfa and other forage crops
US3583172A (en) * 1969-06-30 1971-06-08 Union Carbide Corp Cryogenic cooling of concrete
US3672182A (en) * 1970-06-25 1972-06-27 Air Prod & Chem Water cooling method and apparatus employing liquid nitrogen
DE2659546A1 (de) * 1976-12-30 1978-07-13 Boehringer Mannheim Gmbh Verfahren zur herstellung von gefrorenen granulaten
US4348867A (en) * 1977-01-21 1982-09-14 General Kinematics Corporation Method for treating moist pulverulent material
US4222527A (en) * 1979-02-22 1980-09-16 Union Carbide Corporation Cryopulverizing packed bed control system
US4250714A (en) * 1979-05-04 1981-02-17 Covy Allan P Method for cooling metal turnings
FR2456556A1 (fr) * 1979-05-18 1980-12-12 Air Liquide Procede et installation de broyage cryogenique de produits
US4245478A (en) * 1979-08-17 1981-01-20 Covy Allan P Method for cooling metal turnings and other metals
FR2532821B1 (fr) * 1982-09-13 1987-08-14 Carboxyque Francaise Procede et installation de refroidissement de la viande dans un hachoir-melangeur par injection de neige carbonique
US4479362A (en) * 1982-12-10 1984-10-30 Air Products And Chemicals, Inc. Cryogenic cooling of pneumatically transported solids

Also Published As

Publication number Publication date
AU573850B2 (en) 1988-06-23
ES536599A0 (es) 1986-04-01
CA1272038A (fr) 1990-07-31
FR2566515A1 (fr) 1985-12-27
ES554233A0 (es) 1987-04-01
US4619113A (en) 1986-10-28
ES8704617A1 (es) 1987-04-01
ATE34040T1 (de) 1988-05-15
BR8502986A (pt) 1986-03-04
EP0166655A1 (de) 1986-01-02
FR2566515B1 (fr) 1987-03-27
DE3562527D1 (en) 1988-06-09
AU4392285A (en) 1986-01-02
JPS6117880A (ja) 1986-01-25
KR860000367A (ko) 1986-01-28
ES8606620A1 (es) 1986-04-01
ZA854709B (en) 1986-02-26

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